{"id":2308,"date":"2026-05-29T21:47:53","date_gmt":"2026-05-29T21:47:53","guid":{"rendered":"https:\/\/vkrastev1blog.com\/?p=2308"},"modified":"2026-11-03T19:35:02","modified_gmt":"2026-11-03T22:35:02","slug":"questions-and-informations-prepairing-for-java-developer-job-interview","status":"publish","type":"post","link":"https:\/\/vkrastev1blog.com\/2026\/05\/29\/questions-and-informations-prepairing-for-java-developer-job-interview\/","title":{"rendered":"\u51c6\u5907 Java \u5f00\u53d1\u4eba\u5458\u9762\u8bd5\u7684\u95ee\u9898\u548c\u4fe1\u606f"},"content":{"rendered":"\n

Java \u5f00\u53d1\u4eba\u5458\u9762\u8bd5\u51c6\u5907\u95ee\u9898\u548c\u4fe1\u606f<\/h2>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n
\n\n\n\n

SOLID \u539f\u5219\u662f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n

\u4ec0\u4e48\u662f\u5355\u4e00\u804c\u8d23\u539f\u5219\uff08SRP\uff09<\/h2>\n\n\n\n

\u4e00\u4e2a\u7c7b\u5e94\u8be5\u53ea\u6709\u4e00\u79cd\u8d23\u4efb\uff0c\u4e5f\u53ea\u6709\u4e00\u4e2a\u9700\u8981\u6539\u53d8\u7684\u7406\u7531\u3002
\u597d\u5904\u5305\u62ec\u66f4\u5bb9\u6613\u6d4b\u8bd5\u3001\u66f4\u4f4e\u8026\u5408\u548c\u66f4\u597d\u7684\u7ec4\u7ec7\u3002
\u4f8b\u5b50\uff1a<\/p>\n\n\n

\n\t
\n\t\t
\n\t\t\t\n
\n
public class Book {<\/div>
private String name;<\/div>
private String author;<\/div>
private String text;<\/div>
\/\/ constructor, getters, and setters<\/div>
}<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u5f00\u95ed\u539f\u5219\uff08OCP\uff09<\/h2>\n\n\n\n
\u8f6f\u4ef6\u7ec4\u4ef6\uff08\u7c7b\u3001\u6a21\u5757\u3001\u51fd\u6570\uff09\u5e94\u8be5\u5bf9\u6269\u5c55\u5f00\u653e\uff0c\u4f46\u5bf9\u4fee\u6539\u5173\u95ed\u3002
\u8fd9\u662f\u901a\u8fc7\u4f7f\u7528\u63a5\u53e3\u3001\u62bd\u8c61\u7c7b\u548c\u7ee7\u627f\u6765\u5b9e\u73b0\u7684\u3002
\u4f8b\u5b50\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
interface Shape {<\/div>
double area();<\/div>
}<\/div>
class Circle implements Shape <\/div>
{ \/* implementation \/ } <\/div>
class Rectangle implements Shape <\/div>
{ \/ implementation *\/ }<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u91cc\u6c0f\u66ff\u6362\u539f\u7406\uff08LSP\uff09<\/h2>\n\n\n\n
\u5b50\u7c7b\u578b\u5fc5\u987b\u80fd\u591f\u66ff\u6362\u5176\u57fa\u672c\u7c7b\u578b\u800c\u4e0d\u6539\u53d8\u7a0b\u5e8f\u7684\u6b63\u786e\u6027\u3002\u8fd9\u9075\u5faa\u201cis-a\u201d\u5173\u7cfb\u3002
\u4f8b\u5b50\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
class Bird <\/div>
{ \/* common bird behavior \/ } <\/div>
class Sparrow extends Bird <\/div>
{ \/ specific sparrow behavior *\/ }<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u63a5\u53e3\u9694\u79bb\u539f\u5219 (ISP)<\/h2>\n\n\n\n
\u4e0d\u5e94\u5f3a\u8feb\u5ba2\u6237\u7aef\u4f9d\u8d56\u4ed6\u4eec\u4e0d\u4f7f\u7528\u7684\u63a5\u53e3\u3002\u5c06\u5927\u578b\u63a5\u53e3\u5206\u89e3\u4e3a\u66f4\u5c0f\u3001\u66f4\u5177\u4f53\u7684\u63a5\u53e3\u3002
\u4f8b\u5b50\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
interface Worker {<\/div>
void work();<\/div>
}<\/div>
interface Eater {<\/div>
void eat();<\/div>
}<\/div>
class Robot implements Worker <\/div>
{ \/* implementation *\/ }<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u4f9d\u8d56\u5012\u7f6e\u539f\u5219\uff08DIP\uff09<\/h2>\n\n\n\n
\u9ad8\u5c42\u6a21\u5757\u4e0d\u80fd\u4f9d\u8d56\u4e8e\u4f4e\u5c42\u6a21\u5757\uff1b\u4e24\u79cd\u7c7b\u578b\u90fd\u5fc5\u987b\u4f9d\u8d56\u4e8e\u62bd\u8c61\u3002\u62bd\u8c61\u4e0d\u5e94\u8be5\u4f9d\u8d56\u4e8e\u7ec6\u8282\uff1b\u7ec6\u8282\u5fc5\u987b\u4f9d\u8d56\u4e8e\u62bd\u8c61\u3002<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
\/\/ Abstraction<\/div>
interface MessageSender {<\/div>
void sendMessage(String message);<\/div>
}<\/div>
<\/div>
\/\/ High-level module<\/div>
class NotificationService {<\/div>
private MessageSender messageSender;<\/div>
<\/div>
public NotificationService(MessageSender messageSender) {<\/div>
this.messageSender = messageSender;<\/div>
  }<\/div>
<\/div>
public void send(String message) {<\/div>
messageSender.sendMessage(message);<\/div>
  }<\/div>
}<\/div>
<\/div>
\/\/ Low-level module<\/div>
class EmailSender implements MessageSender {<\/div>
@Override<\/div>
public void sendMessage(String message) {<\/div>
System.out.println("Sending Email: " + message);<\/div>
  }<\/div>
}<\/div>
<\/div>
\/\/ Another Low-level module<\/div>
class SmsSender implements MessageSender {<\/div>
@Override<\/div>
public void sendMessage(String message) {<\/div>
System.out.println("Sending SMS: " + message);<\/div>
  }<\/div>
}<\/div>
<\/div>
\/\/ Use SmsSender<\/div>
MessageSender smsSender = new SmsSender();<\/div>
NotificationService notificationService2 = <\/div>
              new NotificationService(smsSender);<\/div>
notificationService2.send("Hello via SMS!");<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
MessageSender \u63a5\u53e3\u4f5c\u4e3a\u62bd\u8c61\u3002\u66f4\u9ad8\u7ea7\u522b\u7684\u6a21\u5757NotificationService\u4f9d\u8d56\u4e8e\u8fd9\u4e2a\u62bd\u8c61\u800c\u4e0d\u662f\u5177\u4f53\u7684\u5b9e\u73b0\u3002
EmailSender \u548c SmsSender \u7b49\u8f83\u4f4e\u7ea7\u522b\u7684\u6a21\u5757\u4e5f\u4f9d\u8d56\u4e8e\u5b9e\u73b0 MessageSender \u63a5\u53e3\u7684\u62bd\u8c61\u3002<\/p>\n\n\n\n
\n\n\n\n
SQL \u4e2d\u7684\u89c4\u8303\u5316\u662f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n
\u4ec0\u4e48\u662f\u6807\u51c6\u5316\uff1f
\u89c4\u8303\u5316\u6d89\u53ca\u5728\u5173\u7cfb\u6570\u636e\u5e93\u4e2d\u6784\u5efa\u6570\u636e\u4ee5\u6d88\u9664\u5197\u4f59\u7b49\u5f02\u5e38\u60c5\u51b5\u3002\u5b83\u5c06\u5927\u578b\u590d\u6742\u7684\u8868\u5206\u89e3\u4e3a\u8f83\u5c0f\u7684\u8868\uff0c\u540c\u65f6\u4fdd\u7559\u6570\u636e\u4e4b\u95f4\u7684\u5173\u7cfb\u3002<\/p>\n\n\n\n
\u4e3a\u4ec0\u4e48\u6807\u51c6\u5316\u5f88\u91cd\u8981\uff1f
\u51cf\u5c11\u5197\u4f59\uff1a\u901a\u8fc7\u5c06\u6570\u636e\u5212\u5206\u4e3a\u8f83\u5c0f\u7684\u8868\uff0c\u6211\u4eec\u53ef\u4ee5\u907f\u514d\u591a\u6b21\u5b58\u50a8\u76f8\u540c\u7684\u4fe1\u606f\u3002
\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\uff1a\u8f83\u5c0f\u7684\u89c4\u8303\u5316\u8868\u53ef\u4ee5\u52a0\u5feb\u67e5\u8be2\u7684\u6267\u884c\u901f\u5ea6\u3002
\u6700\u5927\u9650\u5ea6\u5730\u51cf\u5c11\u66f4\u65b0\u5f02\u5e38\uff1a\u53ef\u4ee5\u5728\u4e0d\u5f71\u54cd\u5176\u4ed6\u8bb0\u5f55\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c\u66f4\u6539\u3002
\u63d0\u9ad8\u6570\u636e\u5b8c\u6574\u6027\uff1a\u786e\u4fdd\u6570\u636e\u4e00\u81f4\u4e14\u51c6\u786e\u3002<\/p>\n\n\n\n
\u5e94\u7528\u5f52\u4e00\u5316\u7684\u573a\u666f
\u6570\u636e\u5b8c\u6574\u6027\uff1a\u9632\u6b62\u66f4\u65b0\u6570\u636e\u65f6\u51fa\u73b0\u4e0d\u4e00\u81f4\uff08\u4f8b\u5982\uff0c\u5f53\u5ba2\u6237\u7684\u5e74\u9f84\u53d1\u751f\u53d8\u5316\u65f6\uff09\u3002
\u9ad8\u6548\u67e5\u8be2\uff1a\u901a\u8fc7\u5206\u89e3\u6570\u636e\u6765\u7b80\u5316\u590d\u6742\u67e5\u8be2\u3002
\u5b58\u50a8\u4f18\u5316\uff1a\u5220\u9664\u591a\u4f59\u7684\u5197\u4f59\u4ee5\u8282\u7701\u7a7a\u95f4\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u5fae\u670d\u52a1\u5355\u4f53\uff1f<\/h2>\n\n\n\n
\u4ec0\u4e48\u662f\u5355\u4f53\uff1f<\/p>\n\n\n\n
\u5355\u4f53\u5e94\u7528\u7a0b\u5e8f\u88ab\u6784\u5efa\u4e3a\u5355\u4e2a\u5b8c\u6574\u7684\u6a21\u5757\u3002\u5b83\u5c06\u6240\u6709\u7ec4\u4ef6\uff08\u4f8b\u5982\u5ba2\u6237\u7aef UI\u3001\u6570\u636e\u5e93\u548c\u670d\u52a1\u5668\u7aef\u5e94\u7528\u7a0b\u5e8f\uff09\u7d27\u5bc6\u8fde\u63a5\u5230\u4e00\u4e2a\u516c\u5171\u4ee3\u7801\u5e93\u4e2d\u3002<\/p>\n\n\n\n
\u4f18\u70b9\uff1a
\u8f7b\u677e\u90e8\u7f72\uff1a\u7531\u4e8e\u5b83\u662f\u5355\u4e2a\u53ef\u6267\u884c\u6587\u4ef6\u6216\u76ee\u5f55\uff0c\u56e0\u6b64\u90e8\u7f72\u7b80\u5355\u660e\u4e86\u3002
\u5f00\u53d1\u901f\u5ea6\uff1a\u5728\u9879\u76ee\u751f\u547d\u5468\u671f\u7684\u65e9\u671f\u9636\u6bb5\uff0c\u6574\u4f53\u5f0f\u67b6\u6784\u56e0\u5176\u7b80\u5355\u6027\u800c\u5141\u8bb8\u5feb\u901f\u5f00\u53d1\u3002
\u6027\u80fd\uff1a\u96c6\u4e2d\u7684\u4ee3\u7801\u5e93\u53ef\u4ee5\u6709\u6548\u5730\u5904\u7406\u5404\u79cd\u529f\u80fd\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u5fae\u670d\u52a1\uff1f<\/h2>\n\n\n\n
\u5fae\u670d\u52a1\u5c06\u5e94\u7528\u7a0b\u5e8f\u5206\u89e3\u4e3a\u66f4\u5c0f\u7684\u3001\u53ef\u72ec\u7acb\u90e8\u7f72\u7684\u670d\u52a1\u3002\u6bcf\u9879\u670d\u52a1\u90fd\u4e13\u6ce8\u4e8e\u7279\u5b9a\u7684\u4e1a\u52a1\u9886\u57df\u3002<\/p>\n\n\n\n
\u4f18\u70b9\uff1a
\u53ef\u6269\u5c55\u6027\uff1a\u5fae\u670d\u52a1\u5141\u8bb8\u72ec\u7acb\u5730\u6269\u5c55\u5404\u4e2a\u7ec4\u4ef6\u3002
\u7075\u6d3b\u6027\uff1a\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u4e3a\u6bcf\u4e2a\u670d\u52a1\u9009\u62e9\u4e0d\u540c\u7684\u6280\u672f\u3002
\u9694\u79bb\u6027\uff1a\u4e00\u9879\u670d\u52a1\u4e2d\u7684\u9519\u8bef\u4e0d\u4f1a\u5f71\u54cd\u5176\u4ed6\u670d\u52a1\u3002<\/p>\n\n\n\n
\u6311\u6218\uff1a
\u590d\u6742\u6027\uff1a\u7ba1\u7406\u591a\u4e2a\u670d\u52a1\u9700\u8981\u53ef\u9760\u7684\u7f16\u6392\u3002
\u7f51\u7edc\u5f00\u9500\uff1a\u670d\u52a1\u4e4b\u95f4\u7684\u901a\u4fe1\u4f1a\u5e26\u6765\u5ef6\u8fdf\u3002
\u90e8\u7f72\u590d\u6742\u6027\uff1a\u8de8\u591a\u4e2a\u670d\u52a1\u534f\u8c03\u66f4\u65b0\u53ef\u80fd\u5177\u6709\u6311\u6218\u6027\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u591a\u6001\u6027\uff1f<\/h2>\n\n\n\n
\u65b9\u6cd5\u91cd\u5199\uff1a
\u5f53\u5b50\u7c7b\u4e3a\u5176\u8d85\u7c7b\u4e2d\u5df2\u5b9a\u4e49\u7684\u65b9\u6cd5\u63d0\u4f9b\u7279\u5b9a\u5b9e\u73b0\u65f6\u3002<\/p>\n\n\n\n
\u65b9\u6cd5\u91cd\u8f7d\uff1a
\u5f53\u4e00\u4e2a\u7c7b\u5177\u6709\u591a\u4e2a\u540c\u540d\u4f46\u5177\u6709\u4e0d\u540c\u53c2\u6570\uff08\u4e0d\u540c\u6570\u91cf\u6216\u7c7b\u578b\u7684\u53c2\u6570\uff09\u7684\u65b9\u6cd5\u65f6\u3002<\/p>\n\n\n\n
\n\n\n\n
\u79c1\u6709\u6784\u9020\u51fd\u6570\u7684\u76ee\u7684\u662f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n
\u79c1\u6709\u6784\u9020\u51fd\u6570\u7528\u5728\u5b9e\u7528\u7a0b\u5e8f\u7c7b\u6216\u5e38\u91cf\u7c7b\u4e2d\u3002
\u8fd9\u4e9b\u7c7b\u4ec5\u5305\u542b\u9759\u6001\u65b9\u6cd5\u6216\u6210\u5458\u3002<\/p>\n\n\n\n
\u907f\u514d\u7ee7\u627f\uff08\u907f\u514d\u5b50\u7c7b\u5316\uff09<\/p>\n\n\n\n
\u5efa\u9020\u8005\u59d4\u6258\uff1a
\u79c1\u6709\u6784\u9020\u51fd\u6570\u5141\u8bb8\u6784\u9020\u51fd\u6570\u59d4\u6258\uff0c\u5176\u4e2d\u7279\u5b9a\u6784\u9020\u51fd\u6570\u8c03\u7528\u516c\u5171\u79c1\u6709\u6784\u9020\u51fd\u6570\u3002<\/p>\n\n\n\n
\u5355\u4f8b\u6a21\u5f0f<\/p>\n\n\n\n
\n\n\n\n
\u5bf9\u4e8e JVM<\/h2>\n\n\n\n
\u6c47\u7f16\uff1a
\u5f53\u60a8\u7f16\u8bd1 .java \u6587\u4ef6\u65f6\uff0cJava \u7f16\u8bd1\u5668\u4f1a\u751f\u6210\u5305\u542b\u5b57\u8282\u7801\uff08\u4e2d\u95f4\u8868\u793a\uff09\u7684 .class \u6587\u4ef6\u3002
\u5b57\u8282\u7801\u4e0e\u5e73\u53f0\u65e0\u5173\uff0c\u53ef\u4ee5\u5728\u4efb\u4f55\u5177\u6709\u517c\u5bb9 JVM \u7684\u7cfb\u7edf\u4e0a\u8fd0\u884c\u3002<\/p>\n\n\n\n
\u7c7b\u52a0\u8f7d\u5668\u5b50\u7cfb\u7edf\uff1a
\u8d1f\u8d23\u5c06\u7c7b\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002
\u5b83\u8bfb\u53d6.class \u6587\u4ef6\uff0c\u751f\u6210\u4e8c\u8fdb\u5236\u6570\u636e\u5e76\u5c06\u5176\u5b58\u50a8\u5728\u65b9\u6cd5\u533a\u4e2d\u3002
\u521b\u5efa\u4e00\u4e2a Class \u5bf9\u8c61\uff0c\u8868\u793a\u5806\u5185\u5b58\u4e2d\u52a0\u8f7d\u7684\u7c7b\u3002<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
Example: <\/div>
Student s1 = new Student(); <\/div>
Class c1 = s1.getClass();<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\u94fe\u63a5\uff1a
\u5b83\u7531\u4e09\u4e2a\u6b65\u9aa4\u7ec4\u6210\uff1a
\u9a8c\u8bc1\uff1a\u68c0\u67e5.class \u6587\u4ef6\u7684\u6b63\u786e\u6027\u3002
\u51c6\u5907\u5de5\u4f5c\uff1a\u4e3a\u7c7b\u53d8\u91cf\u63d0\u4f9b\u8f85\u52a9\u5185\u5b58\u5e76\u521d\u59cb\u5316\u5b83\u4eec\u3002
\u89e3\u6790\uff08\u53ef\u9009\uff09\uff1a\u89e3\u6790\u5bf9\u5176\u4ed6\u7c7b\u6216\u65b9\u6cd5\u7684\u7b26\u53f7\u5f15\u7528\u3002<\/p>\n\n\n\n
\u521d\u59cb\u5316\uff1a
\u6267\u884c\u9759\u6001\u521d\u59cb\u5316\u7a0b\u5e8f\uff08\u4f8b\u5982\u9759\u6001\u5757\uff09\u5e76\u521d\u59cb\u5316\u9759\u6001\u53d8\u91cf\u3002
\u5b9e\u4f8b\u53d8\u91cf\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\u521d\u59cb\u5316\u3002<\/p>\n\n\n\n
\u6267\u884c\u5f15\u64ce\uff1a
\u5c06\u5b57\u8282\u7801\u8f6c\u6362\u4e3a\u673a\u5668\u7801\u3002
\u5305\u62ec\u7528\u4e8e\u6027\u80fd\u4f18\u5316\u7684\u5373\u65f6 (JIT) \u7f16\u8bd1\u3002<\/p>\n\n\n\n
\u7b80\u800c\u8a00\u4e4b\uff0cJVM \u901a\u8fc7\u89e3\u91ca\u5b57\u8282\u7801\u548c\u7ba1\u7406\u5185\u5b58\uff0c\u8ba9 Java \u7a0b\u5e8f\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u8fd0\u884c\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u79c1\u6709\u62bd\u8c61\u65b9\u6cd5\uff1f<\/h2>\n\n\n\n
\u62bd\u8c61\u7c7b\u4e2d\u79c1\u6709\u65b9\u6cd5\u7684\u7528\u4f8b\uff1a<\/p>\n\n\n\n
\u5c3d\u7ba1\u62bd\u8c61\u65b9\u6cd5\u4e0d\u80fd\u662f\u79c1\u6709\u7684\uff0c\u4f46\u60a8\u53ef\u4ee5\u5728\u62bd\u8c61\u7c7b\u4e2d\u51fa\u4e8e\u5404\u79cd\u76ee\u7684\u4f7f\u7528\u79c1\u6709\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
\u8f85\u52a9\u65b9\u6cd5\uff1a\u5b9e\u73b0\u7531\u5176\u4ed6\u65b9\u6cd5\u5171\u4eab\u7684\u901a\u7528\u529f\u80fd\u3002
\u5c01\u88c5\uff1a\u5bf9\u5b50\u7c7b\u9690\u85cf\u5b9e\u73b0\u7ec6\u8282\u3002
\u7c7b\u4f3c\u7ed3\u6784\u7684\u7c7b\uff1a\u4f7f\u7528\u79c1\u6709\u65b9\u6cd5\u521b\u5efa\u5c0f\u7c7b\u4f5c\u4e3a\u6570\u636e\u5bb9\u5668<\/p>\n\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u5783\u573e\u6536\u96c6\u5668\uff1f<\/h2>\n\n\n\n
\u5806\u5185\u5b58\uff1a
Java \u5bf9\u8c61\u662f\u5728\u5806\u5185\u5b58\u4e2d\u521b\u5efa\u7684\uff0c\u5806\u5185\u5b58\u662f\u4e13\u95e8\u5206\u914d\u7684\u5185\u5b58\u533a\u57df\u3002
\u67d0\u4e9b\u5bf9\u8c61\u53d8\u5f97\u4e0d\u53ef\u7528\uff08\u7a0b\u5e8f\u4e0d\u518d\u5f15\u7528\uff09\u3002<\/p>\n\n\n\n
\u5783\u573e\u6536\u96c6\u5668\uff08GC\uff09\uff1a
GC \u8bc6\u522b\u5e76\u5220\u9664\u672a\u4f7f\u7528\u7684\u5bf9\u8c61\u4ee5\u91ca\u653e\u5185\u5b58\u3002
\u5b83\u5728\u540e\u53f0\u81ea\u52a8\u8fd0\u884c\u3002
\u4e24\u79cd\u7c7b\u578b\uff1a
Minor GC\uff1a\u5220\u9664\u5e74\u8f7b\u4ee3\u4e2d\u4e0d\u53ef\u7528\u7684\u5bf9\u8c61\u3002
Major GC\uff08Full GC\uff09\uff1a\u6e05\u9664\u8001\u5e74\u4ee3\u4e2d\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n
\u597d\u5904\uff1a
\u5f00\u53d1\u8005\u4e0d\u9700\u8981\u624b\u52a8\u5220\u9664\u5bf9\u8c61\u3002
GC \u786e\u4fdd\u5185\u5b58\u53ef\u7528\u6027\u5e76\u9632\u6b62 OutOfMemoryErrors\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff1f<\/h2>\n\n\n\n
OOP\u7684\u56db\u4e2a\u539f\u5219\uff1a<\/p>\n\n\n\n
\u5c01\u88c5\uff1a\u5c06\u6570\u636e\uff08\u5c5e\u6027\uff09\u548c\u65b9\u6cd5\uff08\u51fd\u6570\uff09\u5206\u7ec4\u5728\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u4ee5\u9690\u85cf\u5b9e\u73b0\u7ec6\u8282\u5e76\u63d0\u4f9b\u5e72\u51c0\u7684\u63a5\u53e3\u3002<\/p>\n\n\n\n
\u7ee7\u627f\uff1a\u57fa\u4e8e\u73b0\u6709\u7c7b\u521b\u5efa\u65b0\u7c7b\uff0c\u7ee7\u627f\u5176\u5c5e\u6027\u548c\u884c\u4e3a\u3002\u8fd9\u9f13\u52b1\u4ee3\u7801\u91cd\u7528\u3002<\/p>\n\n\n\n
\u591a\u6001\u6027\uff1a\u5141\u8bb8\u901a\u8fc7\u516c\u5171\u63a5\u53e3\u4ee5\u76f8\u540c\u7684\u65b9\u5f0f\u5904\u7406\u4e0d\u540c\u7c7b\u7684\u5bf9\u8c61\u3002\u8fd9\u63d0\u4f9b\u4e86\u7075\u6d3b\u6027\u5e76\u4f7f\u7cfb\u7edf\u66f4\u5bb9\u6613\u6269\u5c55\uff08\u53ef\u6269\u5c55\u6027\uff09\u3002<\/p>\n\n\n\n
\u62bd\u8c61\uff1a\u4e13\u6ce8\u4e8e\u91cd\u8981\u7279\u5f81\uff0c\u540c\u65f6\u9690\u85cf\u4e0d\u5fc5\u8981\u7684\u590d\u6742\u6027\u3002\u62bd\u8c61\u7b80\u5316\u4e86\u8bbe\u8ba1\u5e76\u4f7f\u5176\u66f4\u6613\u4e8e\u7ef4\u62a4\u548c\u7ba1\u7406\u3002<\/p>\n\n\n\n
\n\n\n\n
ACID\u5c5e\u6027\u5bf9\u4e8e\u4fdd\u8bc1\u4e8b\u52a1\u7684\u53ef\u9760\u6027\u548c\u4e00\u81f4\u6027\u8d77\u7740\u5173\u952e\u4f5c\u7528\u3002<\/h2>\n\n\n\n
\u539f\u5b50\u6027\uff1a
\u4ea4\u6613\u8981\u4e48\u5b8c\u5168\u6267\u884c\uff0c\u8981\u4e48\u6839\u672c\u4e0d\u6267\u884c\u3002
\u4e0d\u5b58\u5728\u90e8\u5206\u63d0\u4ea4\uff1a\u5982\u679c\u4e8b\u52a1\u5728\u4e2d\u95f4\u5931\u8d25\uff0c\u5219\u5bf9\u6570\u636e\u5e93\u6240\u505a\u7684\u6240\u6709\u66f4\u6539\u90fd\u5c06\u56de\u6eda\u3002
\u793a\u4f8b\uff1a\u8003\u8651\u4ece\u8d26\u6237 X \u5411\u8d26\u6237 Y \u8f6c\u8d26 100 \u7f8e\u5143\u3002\u5982\u679c\u5728\u4ece X \u63d0\u53d6\u91d1\u989d\u4e4b\u540e\u4f46\u5728\u5c06\u91d1\u989d\u6dfb\u52a0\u5230 Y \u4e4b\u524d\u4ea4\u6613\u5931\u8d25\uff0c\u5219\u6570\u636e\u5e93\u4fdd\u6301\u4e00\u81f4\u3002<\/p>\n\n\n\n
\u4e00\u81f4\u6027\uff1a
\u6570\u636e\u5e93\u5fc5\u987b\u5728\u4e8b\u52a1\u4e4b\u524d\u548c\u4e4b\u540e\u7ef4\u62a4\u5176\u5b8c\u6574\u6027\u7ea6\u675f\u3002
\u793a\u4f8b\uff1a\u5982\u679c\u4ea4\u6613\u524d\u7684\u603b\u989d\u4e3a 700 \u7f8e\u5143\uff08X\uff1a500 \u7f8e\u5143\uff0cY\uff1a200 \u7f8e\u5143\uff09\uff0c\u4ea4\u6613\u540e\u5e94\u4fdd\u6301\u4e0d\u53d8\uff08X\uff1a400 \u7f8e\u5143\uff0cY\uff1a300 \u7f8e\u5143\uff09\u3002<\/p>\n\n\n\n
\u9694\u79bb\uff1a
\u591a\u4e2a\u4e8b\u52a1\u53ef\u4ee5\u5e76\u53d1\u8fd0\u884c\uff0c\u4e92\u4e0d\u5f71\u54cd\u3002
\u4e00\u9879\u4e8b\u52a1\u6240\u505a\u7684\u66f4\u6539\u5728\u63d0\u4ea4\u4e4b\u524d\u5bf9\u5176\u4ed6\u4e8b\u52a1\u4e0d\u53ef\u89c1\u3002
\u4fdd\u8bc1\u4e86\u4e0e\u8fde\u7eed\u6267\u884c\u4e8b\u52a1\u76f8\u540c\u7684\u7ed3\u679c\u3002
\u793a\u4f8b\uff1a\u4e8b\u52a1\u9694\u79bb\u53ef\u9632\u6b62\u7531\u4ea4\u7ec7\u7684\u64cd\u4f5c\u5f15\u8d77\u7684\u4e0d\u4e00\u81f4\u72b6\u6001\u3002<\/p>\n\n\n\n
\u8010\u7528\u6027\uff1a
\u4e00\u65e6\u4e8b\u52a1\u88ab\u63d0\u4ea4\uff0c\u5176\u66f4\u6539\u5c31\u6210\u4e3a\u6c38\u4e45\u6027\u7684\u3002
\u66f4\u6539\u53ef\u4ee5\u5728\u7cfb\u7edf\u6545\u969c\u6216\u5d29\u6e83\u540e\u5e78\u5b58\u4e0b\u6765\u3002
\u6570\u636e\u957f\u671f\u4fdd\u5b58\u6709\u4fdd\u8bc1\u3002
\u793a\u4f8b\uff1a\u5373\u4f7f\u7cfb\u7edf\u91cd\u65b0\u542f\u52a8\u540e\uff0c\u63d0\u4ea4\u7684\u66f4\u6539\u4ecd\u4f1a\u4fdd\u5b58\u3002
\u8bf7\u8bb0\u4f4f\uff0cACID \u5c5e\u6027\u4e3a\u53ef\u9760\u4e14\u4e00\u81f4\u7684\u6570\u636e\u5e93\u64cd\u4f5c\u63d0\u4f9b\u4e86\u57fa\u7840\uff01<\/p>\n\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u7b56\u7565\u6a21\u677f\uff1f<\/h2>\n\n\n\n

\u63cf\u8ff0\uff1a\u5b9a\u4e49\u4e00\u7cfb\u5217\u7b97\u6cd5\uff0c\u5c01\u88c5\u6bcf\u4e2a\u7b97\u6cd5\uff0c\u5e76\u4f7f\u5b83\u4eec\u53ef\u4ee5\u4e92\u6362\u3002\u8fd9\u4f7f\u5f97\u7b97\u6cd5\u53ef\u4ee5\u72ec\u7acb\u4e8e\u4f7f\u7528\u5b83\u7684\u5ba2\u6237\u7aef\u800c\u6539\u53d8\u3002
\u4f8b\u5b50\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
\/\/ Interface for eat behavior<\/div>
interface EatBehavior {<\/div>
void eat();<\/div>
}<\/div>
<\/div>
\/\/ Concrete implementations of eat behavior<\/div>
class NormalDiet implements EatBehavior {<\/div>
@Override<\/div>
public void eat() {<\/div>
\/\/ Normal food<\/div>
  }<\/div>
}<\/div>
<\/div>
class LosingWeightDiet implements EatBehavior {<\/div>
@Override<\/div>
public void eat() {<\/div>
\/\/ Healthy food<\/div>
  }<\/div>
}<\/div>
<\/div>
\/\/ Cat class with eat behavior<\/div>
abstract class Cat {<\/div>
EatBehavior eatBehavior;<\/div>
public void eat() {<\/div>
    eatBehavior.eat();<\/div>
  }<\/div>
<\/div>
public void setEatBehavior(EatBehavior eatBehavior) {<\/div>
 this.eatBehavior = eatBehavior;<\/div>
  }<\/div>
}<\/div>
<\/div>
\/\/ Usage<\/div>
Cat cat = new Cat();<\/div>
cat.setEatBehavior(new LosingWeightDiet());<\/div>
cat.eat(); \/\/ Cat eats with a healthier diet<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\n\n\n\n
\u521b\u4f5c\u6a21\u5f0f<\/h2>\n\n\n\n
\u8fd9\u4e9b\u6a21\u677f\u4e13\u6ce8\u4e8e\u5b9e\u4f8b\u5316\u7c7b\u3002
\u4f8b\u5b50\u5305\u62ec<\/p>\n\n\n\n
\u5de5\u5382\u65b9\u6cd5\uff0c
\u95ee\u9898\u9648\u8ff0\uff1a\u5047\u8bbe\u6211\u4eec\u60f3\u8981\u521b\u5efa\u4e0d\u540c\u7c7b\u578b\u7684\u4ea7\u54c1\uff08\u4f8b\u5982\u6c7d\u8f66\u3001\u81ea\u884c\u8f66\u3001\u81ea\u884c\u8f66\uff09\uff0c\u800c\u4e0d\u5c06\u6211\u4eec\u7684\u4ee3\u7801\u4e0e\u7279\u5b9a\u5b9e\u73b0\u7d27\u5bc6\u8054\u7cfb\u8d77\u6765\u3002
\u5173\u952e\u90e8\u4ef6\uff1a
\u4ea7\u54c1\uff1a\u4e00\u4e2a\u62bd\u8c61\u7c7b\u6216\u63a5\u53e3\uff0c\u5b9a\u4e49\u5de5\u5382\u5c06\u521b\u5efa\u7684\u5bf9\u8c61\u7684\u4e00\u822c\u64cd\u4f5c\u3002
\u5177\u4f53\u4ea7\u54c1\uff1a\u5b9e\u73b0 Product \u63a5\u53e3\u5e76\u8868\u793a\u5177\u4f53\u5bf9\u8c61\u7c7b\u578b\u7684\u771f\u5b9e\u7c7b\u3002
Creator\uff1a\u58f0\u660e\u5de5\u5382\u65b9\u6cd5\u7684\u62bd\u8c61\u7c7b\u6216\u63a5\u53e3\u3002\u5b83\u8d1f\u8d23\u521b\u5efa Product \u5bf9\u8c61\uff0c\u4f46\u59d4\u6258\u5b9e\u9645\u521b\u5efa\u5b50\u7c7b\u3002
\u5177\u4f53\u521b\u5efa\u8005\uff1a\u5b9e\u73b0\u5de5\u5382\u65b9\u6cd5\u7684\u521b\u5efa\u8005\u7684\u5b50\u7c7b\u3002\u4ed6\u4eec\u6839\u636e\u8f93\u5165\u53c2\u6570\u6216\u914d\u7f6e\u51b3\u5b9a\u521b\u5efa\u54ea\u79cd\u7279\u5b9a\u7684\u6df7\u51dd\u571f\u4ea7\u54c1\u3002
\u5de5\u5382\u65b9\u6cd5\uff1aCreator \u7c7b\u4e2d\u5b9a\u4e49\u7684\u7528\u4e8e\u521b\u5efa Product \u5bf9\u8c61\u7684\u65b9\u6cd5\u3002\u5b83\u901a\u5e38\u5728 Creator \u4e2d\u58f0\u660e\u4e3a\u62bd\u8c61\u5e76\u5728 Concrete Creator \u4e2d\u5b9e\u73b0\u3002
Java \u793a\u4f8b\uff1a\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u5bb6\u751f\u4ea7\u4e0d\u540c\u7c7b\u578b\u8f66\u8f86\u7684\u5de5\u5382\u3002\u8fd9\u662f\u4e00\u4e2a\u7b80\u5316\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
\/\/<\/span> Abstract<\/span> Product<\/span><\/div>
interface<\/span> Product<\/span> {<\/span><\/div>
void<\/span> display<\/span>()<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
\/\/<\/span> Concrete<\/span> Products<\/span><\/div>
class<\/span> Car<\/span> implements<\/span> Product<\/span> {<\/span><\/div>
public<\/span> void<\/span> display<\/span>()<\/span> {<\/span><\/div>
System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Car created"<\/span>)<\/span>;<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div>
<\/div>
class<\/span> Bike<\/span> implements<\/span> Product<\/span> {<\/span><\/div>
public<\/span> void<\/span> display<\/span>()<\/span> {<\/span><\/div>
System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Bike created"<\/span>)<\/span>;<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div>
<\/div>
\/\/<\/span> Creator<\/span> (<\/span>Factory<\/span>)<\/span><\/div>
interface<\/span> Factory<\/span> {<\/span><\/div>
Product<\/span> factoryMethod<\/span>()<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
\/\/<\/span> Concrete<\/span> Creators<\/span><\/div>
class<\/span> ConcreteFactoryA<\/span> implements<\/span> Factory<\/span> {<\/span><\/div>
public<\/span> Product<\/span> factoryMethod<\/span>()<\/span> {<\/span><\/div>
return<\/span> new<\/span> Car<\/span>()<\/span>;<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div>
<\/div>
class<\/span> ConcreteFactoryB<\/span> implements<\/span> Factory<\/span> {<\/span><\/div>
public<\/span> Product<\/span> factoryMethod<\/span>()<\/span> {<\/span><\/div>
return<\/span> new<\/span> Bike<\/span>()<\/span>;<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div>
<\/div>
public<\/span> class<\/span> FactoryMethodExample<\/span> {<\/span><\/div>
public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span><\/div>
Factory<\/span> factoryA<\/span> =<\/span> new<\/span> ConcreteFactoryA<\/span>()<\/span>;<\/span><\/div>
Product<\/span> productA<\/span> =<\/span> factoryA<\/span>.<\/span>factoryMethod<\/span>()<\/span>;<\/span><\/div>
productA<\/span>.<\/span>display<\/span>()<\/span>;<\/span><\/div>
Factory<\/span> factoryB<\/span> =<\/span> new<\/span> ConcreteFactoryB<\/span>()<\/span>;<\/span><\/div>
    Product<\/span> productB<\/span> =<\/span> factoryB<\/span>.<\/span>factoryMethod<\/span>()<\/span>;<\/span><\/div>
    productB<\/span>.<\/span>display<\/span>()<\/span>;<\/span><\/div>
}<\/span><\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\n\n\n\n
\u5efa\u8bbe\u8005<\/h2>\n\n\n\n
\u5efa\u9020\u8005\u6a21\u5f0f\u662f\u4e00\u79cd\u521b\u9020\u6027\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u53ef\u4ee5\u8ba9\u4f60\u4e00\u6b65\u6b65\u6784\u5efa\u590d\u6742\u7684\u5bf9\u8c61\uff0c
\u901a\u8fc7\u5c06\u5b83\u4eec\u7684\u6784\u9020\u4e0e\u5b83\u4eec\u7684\u8868\u5f81\u5206\u5f00\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684 Java \u793a\u4f8b\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
\/\/<\/span> Define<\/span> the<\/span> class<\/span> you<\/span> want<\/span> to<\/span> build<\/span><\/div>
class<\/span> Post<\/span> {<\/span><\/div>
private<\/span> final<\/span> String<\/span> title<\/span>;<\/span><\/div>
private<\/span> final<\/span> String<\/span> text<\/span>;<\/span><\/div>
private<\/span> final<\/span> String<\/span> category<\/span>;<\/span><\/div>
<\/div>
Post<\/span>(<\/span>Builder<\/span> builder<\/span>)<\/span> {<\/span><\/div>
    this<\/span>.<\/span>title<\/span> =<\/span> builder<\/span>.<\/span>title<\/span>;<\/span><\/div>
    this<\/span>.<\/span>text<\/span> =<\/span> builder<\/span>.<\/span>text<\/span>;<\/span><\/div>
    this<\/span>.<\/span>category<\/span> =<\/span> builder<\/span>.<\/span>category<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
\/\/<\/span> Getters<\/span> for<\/span> properties<\/span><\/div>
public<\/span> String<\/span> getTitle<\/span>()<\/span> {<\/span><\/div>
    return<\/span> title<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
public<\/span> String<\/span> getText<\/span>()<\/span> {<\/span><\/div>
    return<\/span> text<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
public<\/span> String<\/span> getCategory<\/span>()<\/span> {<\/span><\/div>
    return<\/span> category<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
\/\/<\/span> Builder<\/span> class<\/span><\/div>
public<\/span> static<\/span> class<\/span> Builder<\/span> {<\/span><\/div>
    private<\/span> String<\/span> title<\/span>;<\/span><\/div>
    private<\/span> String<\/span> text<\/span>;<\/span><\/div>
    private<\/span> String<\/span> category<\/span>;<\/span><\/div>
<\/div>
    public<\/span> Builder<\/span> title<\/span>(<\/span>String<\/span> title<\/span>)<\/span> {<\/span><\/div>
        this<\/span>.<\/span>title<\/span> =<\/span> title<\/span>;<\/span><\/div>
        return<\/span> this<\/span>;<\/span><\/div>
    }<\/span><\/div>
<\/div>
    public<\/span> Builder<\/span> text<\/span>(<\/span>String<\/span> text<\/span>)<\/span> {<\/span><\/div>
        this<\/span>.<\/span>text<\/span> =<\/span> text<\/span>;<\/span><\/div>
        return<\/span> this<\/span>;<\/span><\/div>
    }<\/span><\/div>
<\/div>
    public<\/span> Builder<\/span> category<\/span>(<\/span>String<\/span> category<\/span>)<\/span> {<\/span><\/div>
        this<\/span>.<\/span>category<\/span> =<\/span> category<\/span>;<\/span><\/div>
        return<\/span> this<\/span>;<\/span><\/div>
    }<\/span><\/div>
<\/div>
    public<\/span> Post<\/span> build<\/span>()<\/span> {<\/span><\/div>
        return<\/span> new<\/span> Post<\/span>(<\/span>this<\/span>)<\/span>;<\/span><\/div>
    }<\/span><\/div>
}<\/span><\/div>
<\/div>
\/\/<\/span> Usage<\/span><\/div>
public<\/span> class<\/span> Main<\/span> {<\/span><\/div>
public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span><\/div>
Post<\/span> post<\/span> =<\/span> new<\/span> Post<\/span>.<\/span>Builder<\/span>()<\/span><\/div>
.<\/span>title<\/span>(<\/span>"Java Builder Pattern"<\/span>)<\/span><\/div>
.<\/span>text<\/span>(<\/span>"Explaining how to implement the Builder Pattern in Java"<\/span>)<\/span><\/div>
.<\/span>category<\/span>(<\/span>"Design Patterns"<\/span>)<\/span><\/div>
.<\/span>build<\/span>()<\/span>;<\/span><\/div>
<\/div>
System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Title: "<\/span> +<\/span> post<\/span>.<\/span>getTitle<\/span>())<\/span>;<\/span><\/div>
    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Text: "<\/span> +<\/span> post<\/span>.<\/span>getText<\/span>())<\/span>;<\/span><\/div>
    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Category: "<\/span> +<\/span> post<\/span>.<\/span>getCategory<\/span>())<\/span>;<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\n\n\n\n
\u539f\u578b<\/h2>\n\n\n\n
\u539f\u578b<\/strong>

\u539f\u578b\u6a21\u5f0f\u662f\u4e00\u79cd\u521b\u9020\u6027\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5141\u8bb8\u60a8\u901a\u8fc7\u590d\u5236\u73b0\u6709\u5bf9\u8c61\u6765\u521b\u5efa\u65b0\u5bf9\u8c61\u3002
\u60a8\u65e0\u9700\u4ece\u5934\u5f00\u59cb\u521b\u5efa\u65b0\u5b9e\u4f8b\uff0c\u800c\u662f\u514b\u9686\u73b0\u6709\u539f\u578b\uff0c\u8fd9\u53ef\u4ee5\u66f4\u52a0\u9ad8\u6548\u548c\u7075\u6d3b\u3002\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a Java \u4e2d\u7684\u4f8b\u5b50\uff1a
\u5b9a\u4e49\u539f\u578b\u63a5\u53e3<\/strong>\uff1a\u9996\u5148\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a\u7684\u62bd\u8c61\u7c7b\u6216\u63a5\u53e3 Tree<\/code>\uff0c\u7528\u62bd\u8c61\u65b9\u6cd5 copy()<\/code>:<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
public abstract class Tree {<\/div>
public abstract Tree copy();<\/div>
}<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\u5177\u4f53\u539f\u578b<\/strong>\uff1a\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5b9e\u73b0\u4e24\u4e2a\u6269\u5c55\u7684\u5177\u4f53\u7c7b Tree<\/code>: PlasticTree<\/code> \u548c PineTree<\/code>\u3002\u8fd9\u4e9b\u7c7b\u4ee3\u8868\u7279\u5b9a\u7c7b\u578b\u7684\u6811\u5e76\u63d0\u4f9b\u81ea\u5df1\u7684\u65b9\u6cd5\u5b9e\u73b0 copy()<\/code>:<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
public class PlasticTree extends Tree {<\/div>
@Override<\/div>
public Tree copy() {<\/div>
PlasticTree plasticTreeClone = new PlasticTree(this.getMass(), <\/div>
this.getHeight());<\/div>
plasticTreeClone.setPosition(this.getPosition());<\/div>
return plasticTreeClone;<\/div>
  }<\/div>
}<\/div>
<\/div>
public class PineTree extends Tree {<\/div>
@Override<\/div>
public Tree copy() {<\/div>
PineTree pineTreeClone = new PineTree(this.getMass(), <\/div>
this.getHeight());<\/div>
pineTreeClone.setPosition(this.getPosition());<\/div>
return pineTreeClone;<\/div>
  }<\/div>
}<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n

\u5728\u8fd9\u4e9b\u7c7b\u4e2d\uff0c\u6211\u4eec\u6839\u636e\u6811\u7684\u7279\u5b9a\u7c7b\u578b\u5b9a\u5236\u514b\u9686\u8fc7\u7a0b\u3002\u4f8b\u5982\u6211\u4eec\u590d\u5236 \u5927\u91cf\u7684<\/em>, \u9ad8\u5ea6<\/em> \u548c \u4f4d\u7f6e<\/em> \u539f\u6765\u7684\u6811\u3002
\u7528\u6cd5<\/strong>\uff1a\u73b0\u5728\u8ba9\u6211\u4eec\u5b9e\u4f8b\u5316\u6211\u4eec\u7684\u5177\u4f53\u539f\u578b\uff1a
\u722a\u54c7<\/p>\n\n\n\n
<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
public<\/span> class<\/span> Main<\/span> {<\/span><\/div>
public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span><\/div>
Tree<\/span> originalPlasticTree<\/span> =<\/span> new<\/span> PlasticTree<\/span>(<\/span>10<\/span>,<\/span> 5<\/span>)<\/span>;<\/span><\/div>
Tree<\/span> clonedPlasticTree<\/span> =<\/span> originalPlasticTree<\/span>.<\/span>copy<\/span>()<\/span>;<\/span><\/div>
    Tree<\/span> originalPineTree<\/span> =<\/span> new<\/span> PineTree<\/span>(<\/span>15<\/span>,<\/span> 8<\/span>)<\/span>;<\/span><\/div>
    Tree<\/span> clonedPineTree<\/span> =<\/span> originalPineTree<\/span>.<\/span>copy<\/span>()<\/span>;<\/span><\/div>
<\/div>
    \/\/<\/span> Use<\/span> the<\/span> cloned<\/span> trees<\/span> as<\/span> needed<\/span><\/div>
    \/\/<\/span> ...<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662f\u7ed3\u6784\u6a21\u5f0f\uff1f<\/h2>\n\n\n\n
\u8fd9\u4e9b\u6a21\u677f\u6307\u7684\u662f\u7c7b\u7684\u7ed3\u6784\u548c\u7ec4\u6210\u3002<\/p>\n\n\n\n
\u9002\u914d\u5668\u6a21\u5f0f<\/h2>\n\n\n\n
\u9002\u914d\u5668\u6a21\u5f0f\u662f\u4e00\u79cd\u7ed3\u6784\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5141\u8bb8\u4e24\u4e2a\u4e0d\u517c\u5bb9\u7684\u63a5\u53e3\u4e00\u8d77\u5de5\u4f5c\u3002
\u5b83\u5145\u5f53\u8fd9\u4e9b\u63a5\u53e3\u4e4b\u95f4\u7684\u6865\u6881\uff0c\u4f7f\u5b83\u4eec\u80fd\u591f\u5728\u4e0d\u66f4\u6539\u6e90\u4ee3\u7801\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c\u534f\u4f5c\u3002<\/p>\n\n\n\n
\u5bf9\u8c61\u9002\u914d\u5668\uff1a
\u5728\u8fd9\u79cd\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u7ec4\u5408\u5c06\u903b\u8f91\u59d4\u6258\u7ed9\u9002\u914d\u5668\u3002
Adapter \u5305\u542b\u4e00\u4e2a Adaptee\uff0c\u5e76\u5c06 request() \u65b9\u6cd5\u59d4\u6258\u7ed9 Adaptee \u4e2d\u7684 SpecificRequest() \u65b9\u6cd5\u3002
<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
class Adaptee {<\/div>
void specificRequest() {<\/div>
System.out.println("Adaptee's specific request");<\/div>
  }<\/div>
}<\/div>
<\/div>
\/\/ Target interface<\/div>
interface Target {<\/div>
void request();<\/div>
}<\/div>
<\/div>
\/\/ Adapter (using composition)<\/div>
class Adapter implements Target {<\/div>
private final Adaptee adaptee;<\/div>
<\/div>
Adapter(Adaptee adaptee) {<\/div>
    this.adaptee = adaptee;<\/div>
}<\/div>
<\/div>
@Override<\/div>
public void request() {<\/div>
    adaptee.specificRequest();<\/div>
  }<\/div>
}<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\u7c7b\u9002\u914d\u5668\uff1a
\u9700\u8981\u591a\u91cd\u7ee7\u627f\uff08\u5728Java\u4e2d\u76f4\u63a5\u4e0d\u53ef\u80fd\uff09\u3002
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5e26\u6709\u9ed8\u8ba4\u65b9\u6cd5\u7684\u63a5\u53e3\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002
Adapter \u7ee7\u627f\u81ea Target \u7c7b\u548c Adaptee \u7c7b\u3002<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
\/\/ Target interface<\/div>
interface Target {<\/div>
void request();<\/div>
}<\/div>
<\/div>
\/\/ Adaptee (existing class)<\/div>
class Adaptee {<\/div>
void specificRequest() {<\/div>
System.out.println("Adaptee's specific request");<\/div>
  }<\/div>
}<\/div>
<\/div>
\/\/ Adapter (using class inheritance)<\/div>
class Adapter extends Adaptee implements Target {<\/div>
@Override<\/div>
public void request() {<\/div>
specificRequest();<\/div>
  }<\/div>
}<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n

\u597d\u5904\u548c\u6743\u8861\uff1a
\u7c7b\u9002\u914d\u5668\u975e\u5e38\u9002\u5408\u65b9\u6cd5\u7684\u4e00\u5bf9\u4e00\u6620\u5c04\u3002
\u5bf9\u8c61\u9002\u914d\u5668\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u7075\u6d3b\u6027\u5e76\u907f\u514d\u4e86\u6e90\u4ee3\u7801\u4fee\u6539\u3002<\/p>\n\n\n\n
\n\n\n\n
\u88c5\u9970\u6a21\u5f0f<\/h2>\n\n\n\n
\u88c5\u9970\u5668\u6a21\u5f0f\u662f\u4e00\u79cd\u521b\u9020\u6027\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5141\u8bb8\u60a8\u52a8\u6001\u5730\u5411\u5bf9\u8c61\u6dfb\u52a0\u529f\u80fd\u548c\u884c\u4e3a\uff0c\u800c\u65e0\u9700
\u5f71\u54cd\u540c\u4e00\u7c7b\u4e2d\u5176\u4ed6\u73b0\u6709\u5bf9\u8c61\u7684\u884c\u4e3a\u3002\u5f53\u60a8\u60f3\u8981\u6269\u5c55\u5bf9\u8c61\u7684\u529f\u80fd\u65f6\uff0c\u5b83\u7279\u522b\u6709\u7528\uff0c
\u800c\u4e0d\u6539\u53d8\u5176\u7ed3\u6784\u3002<\/p>\n\n\n\n
\u6982\u8ff0\uff1a
\u88c5\u9970\u5668\u6a21\u5f0f\u901a\u8fc7\u7528\u9644\u52a0\u529f\u80fd\u201c\u5305\u88c5\u201d\u539f\u59cb\u5bf9\u8c61\u6765\u63d0\u4f9b\u539f\u59cb\u5bf9\u8c61\u7684\u6269\u5c55\u63a5\u53e3\u3002
\u6211\u4eec\u66f4\u559c\u6b22\u7ec4\u5408\u800c\u4e0d\u662f\u7ee7\u627f\uff0c\u4ee5\u51cf\u5c11\u5b50\u7c7b\u5316\u7684\u5f00\u9500\u3002
\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u6dfb\u52a0\u88c5\u9970\u5668\uff0c\u8fd9\u63d0\u4f9b\u4e86\u7075\u6d3b\u6027\u3002
\u793a\u4f8b\u573a\u666f\uff1a\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5723\u8bde\u6811\u5bf9\u8c61\uff0c\u6211\u4eec\u60f3\u7528\u5404\u79cd\u5143\u7d20\uff08\u4f8b\u5982\u82b1\u73af\u3001\u91d1\u5c5e\u4e1d\u548c\u6ce1\u6ce1\u706f\uff09\u6765\u88c5\u9970\u5b83\u3002\u6211\u4eec\u5c06\u9075\u5faa\u6700\u521d\u7684\u56db\u4eba\u5e2e\u8bbe\u8ba1\u60ef\u4f8b\u3002
\u6267\u884c\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
First<\/span>,<\/span> create<\/span> a<\/span> ChristmasTree<\/span> interface<\/span>:<\/span><\/div>
Java<\/span><\/div>
<\/div>
public<\/span> interface<\/span> ChristmasTree<\/span> {<\/span><\/div>
String<\/span> decorate<\/span>()<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
Implement<\/span> the<\/span> interface<\/span> with<\/span> a<\/span> basic<\/span> tree<\/span>:<\/span><\/div>
Java<\/span><\/div>
<\/div>
public<\/span> class<\/span> ChristmasTreeImpl<\/span> implements<\/span> ChristmasTree<\/span> {<\/span><\/div>
@<\/span>Override<\/span><\/div>
public<\/span> String<\/span> decorate<\/span>()<\/span> {<\/span><\/div>
return<\/span> "Christmas tree"<\/span>;<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div>
<\/div>
Next<\/span>,<\/span> create<\/span> an<\/span> abstract<\/span> TreeDecorator<\/span> class<\/span> that<\/span> implements<\/span> <\/div>
ChristmasTree<\/span> and<\/span> holds<\/span> the<\/span> decorated<\/span> tree<\/span>:<\/span><\/div>
Java<\/span><\/div>
<\/div>
public<\/span> abstract<\/span> class<\/span> TreeDecorator<\/span> implements<\/span> ChristmasTree<\/span> {<\/span><\/div>
private<\/span> final<\/span> ChristmasTree<\/span> tree<\/span>;<\/span><\/div>
public<\/span> TreeDecorator<\/span>(<\/span>ChristmasTree<\/span> tree<\/span>)<\/span> {<\/span><\/div>
    this<\/span>.<\/span>tree<\/span> =<\/span> tree<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
@<\/span>Override<\/span><\/div>
public<\/span> String<\/span> decorate<\/span>()<\/span> {<\/span><\/div>
    return<\/span> tree<\/span>.<\/span>decorate<\/span>()<\/span>;<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div>
<\/div>
Now<\/span> create<\/span> specific<\/span> decorators<\/span>.<\/span> For<\/span> example<\/span>,<\/span> BubbleLights<\/span>:<\/span><\/div>
Java<\/span><\/div>
<\/div>
public<\/span> class<\/span> BubbleLights<\/span> extends<\/span> TreeDecorator<\/span> {<\/span><\/div>
public<\/span> BubbleLights<\/span>(<\/span>ChristmasTree<\/span> tree<\/span>)<\/span> {<\/span><\/div>
  super<\/span>(<\/span>tree<\/span>)<\/span>;<\/span><\/div>
  }<\/span><\/div>
<\/div>
@<\/span>Override<\/span><\/div>
public<\/span> String<\/span> decorate<\/span>()<\/span> {<\/span><\/div>
    return<\/span> super<\/span>.<\/span>decorate<\/span>()<\/span> +<\/span> " with Bubble Lights"<\/span>;<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div>
<\/div>
public<\/span> class<\/span> Garland<\/span> extends<\/span> TreeDecorator<\/span> {<\/span><\/div>
public<\/span> Garland<\/span>(<\/span>ChristmasTree<\/span> tree<\/span>)<\/span> {<\/span><\/div>
super<\/span>(<\/span>tree<\/span>)<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
@<\/span>Override<\/span><\/div>
public<\/span> String<\/span> decorate<\/span>()<\/span> {<\/span><\/div>
    return<\/span> super<\/span>.<\/span>decorate<\/span>()<\/span> +<\/span> " with Garland"<\/span>;<\/span><\/div>
}<\/span><\/div>
<\/div>
}<\/span><\/div>
Usage<\/span>:<\/span><\/div>
Create<\/span> decorated<\/span> trees<\/span>:<\/span><\/div>
<\/div>
public<\/span> class<\/span> DecoratorPatternDemo<\/span> {<\/span><\/div>
public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span><\/div>
ChristmasTree<\/span> tree1<\/span> =<\/span> new<\/span> Garland<\/span>(<\/span>new<\/span> ChristmasTreeImpl<\/span>())<\/span>;<\/span><\/div>
System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>tree1<\/span>.<\/span>decorate<\/span>())<\/span>;<\/span> <\/div>
\/\/<\/span> Output: "Christmas tree with Garland"<\/span><\/div>
ChristmasTree<\/span> tree2<\/span> =<\/span> new<\/span> BubbleLights<\/span>(<\/span><\/div>
new<\/span> Garland<\/span>(<\/span>new<\/span> Garland<\/span>(<\/span>new<\/span> ChristmasTreeImpl<\/span>())))<\/span>;<\/span><\/div>
    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>tree2<\/span>.<\/span>decorate<\/span>())<\/span>;<\/span> <\/div>
    \/\/<\/span> Output: "Christmas tree with Garland with Garland <\/span><\/div>
    \/\/<\/span> with<\/span> Bubble<\/span> Lights<\/span>"<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n

\u6a21\u5f0f\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u6dfb\u52a0\u88c5\u9970\u5668\uff0c\u4ece\u800c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u7075\u6d3b\u5730\u8fdb\u884c\u88c5\u9970\u3002
\u8bf7\u8bb0\u4f4f\uff0c\u88c5\u9970\u5668\u6a21\u5f0f\u5e7f\u6cdb\u7528\u4e8e\u60a8\u60f3\u8981\u6269\u5c55\u5bf9\u8c61\u7684\u884c\u4e3a\u800c\u4e0d\u4fee\u6539\u5176\u57fa\u672c\u7ed3\u6784\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n
\n\n\n\n
\u7acb\u9762\u56fe\u6848<\/h2>\n\n\n\n
\u5916\u89c2\u6a21\u5f0f\u662f\u4e00\u79cd\u7ed3\u6784\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u901a\u8fc7\u63d0\u4f9b\u7edf\u4e00\u7684\u63a5\u53e3\u6765\u7b80\u5316\u4e0e\u590d\u6742\u5b50\u7cfb\u7edf\u7684\u4ea4\u4e92\u3002
\u5b83\u5145\u5f53\u201c\u524d\u95e8\u201d\uff0c\u9690\u85cf\u5185\u90e8\u590d\u6742\u6027\u5e76\u4f7f\u7cfb\u7edf\u66f4\u6613\u4e8e\u5ba2\u6237\u4f7f\u7528\u3002<\/p>\n\n\n\n
\u5408\u6210\u7684<\/h2>\n\n\n\n
\u590d\u5408\u6a21\u5f0f\u662f\u4e00\u79cd\u7ed3\u6784\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5141\u8bb8\u60a8\u5c06\u5bf9\u8c61\u7ec4\u5408\u6210\u6811\u7ed3\u6784\u6765\u8868\u793a\u90e8\u5206-\u6574\u4f53\u5c42\u6b21\u7ed3\u6784\u3002
\u590d\u5408\u6a21\u5f0f\u80cc\u540e\u7684\u4e3b\u8981\u601d\u60f3\u662f\u6784\u5efa\u5bf9\u8c61\u7684\u6811\u7ed3\u6784\uff0c\u5176\u4e2d\u5355\u4e2a\uff08\u53f6\uff09\u5bf9\u8c61\u548c\u590d\u5408\u5bf9\u8c61\u5171\u4eab\u4e00\u4e2a\u516c\u5171\u63a5\u53e3\u3002<\/p>\n\n\n\n
\u57fa\u7840\u7ec4\u4ef6\uff08\u90e8\u95e8\uff09\uff1a\u6211\u4eec\u5c06\u5b9a\u4e49\u4e00\u4e2a\u7b80\u5355\u7684\u90e8\u95e8\u63a5\u53e3\u4f5c\u4e3a\u6211\u4eec\u7684\u57fa\u7840\u7ec4\u4ef6\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
public interface Department {<\/div>
void printDepartmentName();<\/div>
}<\/div>
<\/div>
Leaf Components (FinancialDepartment and SalesDepartment): <\/div>
Let\u2019s create classes for financial and sales departments, <\/div>
both implementing the Department interface:<\/div>
<\/div>
public class FinancialDepartment implements Department {<\/div>
  \/\/ Implementation details (e.g., id, name)<\/div>
  public void printDepartmentName() {<\/div>
  System.out.println(getClass().getSimpleName());<\/div>
  }<\/div>
}<\/div>
<\/div>
public class SalesDepartment implements Department {<\/div>
  \/\/ Implementation details (e.g., id, name)<\/div>
  public void printDepartmentName() {<\/div>
  System.out.println(getClass().getSimpleName());<\/div>
  }<\/div>
}<\/div>
<\/div>
These leaf classes implement the printDepartmentName() <\/div>
method and don\u2019t contain references to other Department objects.<\/div>
Composite Element (HeadDepartment): As a composite class, <\/div>
let\u2019s create a HeadDepartment that holds a collection of <\/div>
Department components:<\/div>
<\/div>
import java.util.ArrayList;<\/div>
import java.util.List;<\/div>
<\/div>
public class HeadDepartment implements Department {<\/div>
  private Integer id;<\/div>
  private String name;<\/div>
  private List childDepartments;<\/div>
<\/div>
  public HeadDepartment(Integer id, String name) {<\/div>
    this.id = id;<\/div>
    this.name = name;<\/div>
    this.childDepartments = new ArrayList<>();<\/div>
  }<\/div>
<\/div>
  public void printDepartmentName() {<\/div>
    childDepartments.forEach(Department::printDepartmentName);<\/div>
  }<\/div>
<\/div>
  public void addDepartment(Department department) {<\/div>
    childDepartments.add(department);<\/div>
  }<\/div>
<\/div>
  public void removeDepartment(Department department) {<\/div>
    childDepartments.remove(department);<\/div>
  }<\/div>
}<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
HeadDepartment \u7c7b\u5b9e\u73b0 printDepartmentName() \u65b9\u6cd5\u5e76\u63d0\u4f9b\u6dfb\u52a0\u548c\u5220\u9664\u5b50\u90e8\u95e8\u7684\u65b9\u6cd5\u3002
\u7528\u6cd5\uff1a\u60a8\u53ef\u4ee5\u521b\u5efa\u53f6\u90e8\u95e8\uff08\u4f8b\u5982FinancialDepartment\u3001SalesDepartment\uff09\u548c\u590d\u5408\u90e8\u95e8\uff08\u4f8b\u5982HeadDepartment\uff09\u7684\u5b9e\u4f8b\u3002\u5c06\u53f6\u90e8\u95e8\u6dfb\u52a0\u5230\u590d\u5408\u6750\u6599\u4e2d\u5e76\u6253\u5370\u5b83\u4eec\u7684\u540d\u79f0\u3002<\/p>\n\n\n\n
<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
public<\/span> class<\/span> Main<\/span> {<\/span><\/div>
public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span><\/div>
    Department<\/span> finance<\/span> =<\/span> new<\/span> FinancialDepartment<\/span>()<\/span>;<\/span><\/div>
    Department<\/span> sales<\/span> =<\/span> new<\/span> SalesDepartment<\/span>()<\/span>;<\/span><\/div>
    HeadDepartment<\/span> headDepartment<\/span> =<\/span> new<\/span> HeadDepartment<\/span>(<\/span>1<\/span>,<\/span> <\/div>
    "Company Departments"<\/span>)<\/span>;<\/span><\/div>
    headDepartment<\/span>.<\/span>addDepartment<\/span>(<\/span>finance<\/span>)<\/span>;<\/span><\/div>
    headDepartment<\/span>.<\/span>addDepartment<\/span>(<\/span>sales<\/span>)<\/span>;<\/span><\/div>
    headDepartment<\/span>.<\/span>printDepartmentName<\/span>()<\/span>;<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div>
<\/div>
Output<\/span>:<\/span><\/div>
FinancialDepartment<\/span><\/div>
SalesDepartment<\/span><\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\u590d\u5408\u6a21\u5f0f\u5141\u8bb8\u60a8\u521b\u5efa\u7075\u6d3b\u7684\u6811\u7ed3\u6784\uff0c\u5176\u4e2d
\u53ef\u4ee5\u7edf\u4e00\u5904\u7406\u5355\u4e2a\u7269\u4f53\u548c\u7ec4\u5408\u7269\uff08\u590d\u5408\u6750\u6599\uff09\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4ec0\u4e48\u662fHASH\u51fd\u6570\uff01\uff01\uff01<\/h2>\n\n\n\n
\u54c8\u5e0c\u51fd\u6570\u662f\u4e00\u79cd\u6570\u5b66\u51fd\u6570\uff0c\u5b83\u63a5\u53d7\u8f93\u5165\uff08\u6216\u201c\u6d88\u606f\u201d\uff09\u5e76\u8fd4\u56de\u56fa\u5b9a\u957f\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c
\u901a\u5e38\u662f\u6570\u5b57\u548c\u5b57\u6bcd\u7684\u5e8f\u5217\u3002\u8be5\u8f93\u51fa\u79f0\u4e3a\u201c\u54c8\u5e0c\u503c\u201d\u6216\u7b80\u79f0\u4e3a\u201c\u54c8\u5e0c\u201d\u3002 
\u54c8\u5e0c\u51fd\u6570\u5e7f\u6cdb\u5e94\u7528\u4e8e\u8ba1\u7b97\u673a\u79d1\u5b66\u548c\u5bc6\u7801\u5b66\u4e2d\uff0c\u5e76\u5177\u6709\u51e0\u4e2a\u91cd\u8981\u7684\u5c5e\u6027\uff1a<\/p>\n\n\n\n
\u54c8\u5e0c\u51fd\u6570\u662f\u5982\u4f55\u4f7f\u7528\u7684\u4ee5\u53ca\u5b83\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1f<\/h2>\n\n\n\n
\u786e\u5b9a\u6027\uff1a\u76f8\u540c\u7684\u8f93\u5165\u5c06\u59cb\u7ec8\u751f\u6210\u76f8\u540c\u7684\u54c8\u5e0c\u503c\u3002<\/p>\n\n\n\n
\u5feb\u901f\uff1a\u8be5\u51fd\u6570\u53ef\u4ee5\u5feb\u901f\u8ba1\u7b97\u4efb\u610f\u8f93\u5165\u7684\u54c8\u5e0c\u503c\u3002
\u552f\u4e00\uff08\u51e0\u4e4e\uff09\uff1a\u4e24\u4e2a\u4e0d\u540c\u7684\u8f93\u5165\u5e94\u8be5\u751f\u6210\u4e0d\u540c\u7684\u54c8\u5e0c\u503c\uff08\u6211\u4eec\u5c1d\u8bd5\u6700\u5c0f\u5316\u201c\u51b2\u7a81\u201d\uff09\u3002
\u4e0d\u53ef\u9006\uff08\u5355\u5411\uff09\uff1a\u7ed9\u5b9a\u4e00\u4e2a\u54c8\u5e0c\uff0c\u5728\u8ba1\u7b97\u4e0a\u5e94\u8be5\u65e0\u6cd5\u6062\u590d\u539f\u59cb\u8f93\u5165\u3002
\u5747\u5300\uff1a\u54c8\u5e0c\u503c\u5747\u5300\u5206\u5e03\u5728\u6e90\u7a7a\u95f4\u4e2d\u3002<\/p>\n\n\n\n
\u54c8\u5e0c\u51fd\u6570\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5404\u79cd\u5e94\u7528\u4e2d\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
\u6570\u636e\u5b8c\u6574\u6027\uff1a\u901a\u8fc7\u6bd4\u8f83\u54c8\u5e0c\u503c\u6765\u786e\u4fdd\u6570\u636e\u4e0d\u88ab\u66f4\u6539\u6216\u7be1\u6539\u3002
\u5bc6\u7801\u5b58\u50a8\uff1a\u7528\u4e8e\u5b89\u5168\u5b58\u50a8\u6563\u5217\u5bc6\u7801\u800c\u4e0d\u662f\u771f\u5b9e\u5bc6\u7801\u3002
\u5bc6\u7801\u5b66\uff1a\u7528\u4e8e\u6570\u5b57\u7b7e\u540d\u548c\u5176\u4ed6\u5bc6\u7801\u7b97\u6cd5\u3002
\u54c8\u5e0c\u8868\uff1a\u7528\u4e8e\u7f16\u7a0b\u4e2d\u9ad8\u6548\u7684\u6570\u636e\u68c0\u7d22\u3002<\/p>\n\n\n\n
\u7ed9\u6211\u4e00\u4e2a\u54c8\u5e0c\u6620\u5c04\u7684\u4f8b\u5b50 – \u4f60\u4f1a\u5982\u4f55\u5b9e\u73b0\u5b83\uff1f<\/h2>\n\n\n\n
SHA\uff08\u5b89\u5168\u54c8\u5e0c\u7b97\u6cd5\uff09\uff1a
\u5b83\u5305\u62ec SHA-1\u3001SHA-256\u3001SHA-384 \u548c SHA-512 \u7b49\u53d8\u4f53\u3002
SHA-256 \u548c SHA-512 \u5e7f\u6cdb\u5e94\u7528\u4e8e\u5bc6\u7801\u5b66\u548c\u533a\u5757\u94fe\u6280\u672f\uff08\u4f8b\u5982\u6bd4\u7279\u5e01\uff09\u3002<\/p>\n\n\n\n
<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
import<\/span> java<\/span>.<\/span>security<\/span>.<\/span>MessageDigest<\/span>;<\/span><\/div>
import<\/span> java<\/span>.<\/span>security<\/span>.<\/span>NoSuchAlgorithmException<\/span>;<\/span><\/div>
<\/div>
public<\/span> class<\/span> HashExample<\/span> {<\/span><\/div>
public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span><\/div>
try<\/span> {<\/span><\/div>
\/\/<\/span> The<\/span> input<\/span> string<\/span> to<\/span> be<\/span> hashed<\/span><\/div>
String<\/span> input<\/span> =<\/span> "Hello, world!"<\/span>;<\/span><\/div>
        \/\/<\/span> Create<\/span> a<\/span> MessageDigest<\/span> instance<\/span> for<\/span> SHA<\/span>-<\/span>256<\/span><\/div>
        MessageDigest<\/span> digest<\/span> =<\/span> <\/div>
        MessageDigest<\/span>.<\/span>getInstance<\/span>(<\/span>"SHA-256"<\/span>)<\/span>;<\/span><\/div>
<\/div>
        \/\/<\/span> Compute<\/span> the<\/span> hash<\/span><\/div>
        byte<\/span>[]<\/span> hash<\/span> =<\/span> digest<\/span>.<\/span>digest<\/span>(<\/span>input<\/span>.<\/span>getBytes<\/span>())<\/span>;<\/span><\/div>
<\/div>
        \/\/<\/span> Convert<\/span> the<\/span> hash<\/span> bytes<\/span> to<\/span> a<\/span> hexadecimal<\/span> string<\/span><\/div>
        StringBuilder<\/span> hexString<\/span> =<\/span> new<\/span> StringBuilder<\/span>()<\/span>;<\/span><\/div>
        for<\/span> (<\/span>byte<\/span> b : hash) {<\/span><\/div>
            String<\/span> hex<\/span> =<\/span> String<\/span>.<\/span>format<\/span>(<\/span>"%02x"<\/span>,<\/span> b<\/span>)<\/span>;<\/span><\/div>
            hexString<\/span>.<\/span>append<\/span>(<\/span>hex<\/span>)<\/span>;<\/span><\/div>
        }<\/span><\/div>
<\/div>
        \/\/<\/span> Print<\/span> the<\/span> resulting<\/span> hash<\/span><\/div>
        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"SHA-256 Hash: "<\/span> +<\/span> <\/div>
        hexString<\/span>.<\/span>toString<\/span>())<\/span>;<\/span><\/div>
    }<\/span> catch<\/span> (<\/span>NoSuchAlgorithmException<\/span> e<\/span>)<\/span> {<\/span><\/div>
        System<\/span>.<\/span>err<\/span>.<\/span>println<\/span>(<\/span>"Error: "<\/span> +<\/span> e<\/span>.<\/span>getMessage<\/span>())<\/span>;<\/span><\/div>
    }<\/span><\/div>
  }<\/span><\/div>
}<\/span><\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
\u8f93\u5165\u6570\u636e\uff1a\u8f93\u5165\u53d8\u91cf\u5305\u542b\u6211\u4eec\u8981\u6563\u5217\u7684\u6570\u636e\u3002
MessageDigest \u521d\u59cb\u5316\uff1aMessageDigest \u5b9e\u4f8b\u662f\u4f7f\u7528 getInstance(“SHA-256”) \u521b\u5efa\u7684\uff0c\u5b83\u6307\u5b9a SHA-256 \u54c8\u5e0c\u7b97\u6cd5\u3002
\u54c8\u5e0c\uff1a\u6458\u8981\u65b9\u6cd5\u8ba1\u7b97\u8f93\u5165\u6570\u636e\u7684\u54c8\u5e0c\u503c\u3002
\u5341\u516d\u8fdb\u5236\u8f6c\u6362\uff1a\u7531\u4e8e\u54c8\u5e0c\u503c\u662f\u4e8c\u8fdb\u5236\u683c\u5f0f\uff0c\u56e0\u6b64\u6211\u4eec\u4f7f\u7528\u5faa\u73af\u5c06\u5176\u8f6c\u6362\u4e3a\u66f4\u5177\u53ef\u8bfb\u6027\u7684\u5341\u516d\u8fdb\u5236\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n
\n\n\n\n
\u653e\u7f6e\u5e76\u6253\u8865\u4e01\uff1f\u6211\u4eec\u4ec0\u4e48\u65f6\u5019\u5e94\u8be5\u4f7f\u7528\u5b83\u4eec\uff1f<\/h2>\n\n\n\n
PUT \u548c PATCH \u662f\u7528\u4e8e\u66f4\u65b0\u670d\u52a1\u5668\u4e0a\u8d44\u6e90\u7684 HTTP \u65b9\u6cd5\uff0c\u4f46\u5b83\u4eec\u7684\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e\u5e94\u7528\u66f4\u6539\u7684\u65b9\u5f0f\uff1a<\/p>\n\n\n\n
\u653e\uff1a
\u5b8c\u6574\u66f4\u65b0\uff1a
PUT \u7528\u4e8e\u5b8c\u5168\u66ff\u6362\u73b0\u6709\u8d44\u6e90\u3002
\u5373\u4f7f\u53ea\u66f4\u6539\u4e86\u90e8\u5206\u8d44\u6e90\uff0c\u4e5f\u5fc5\u987b\u5728\u8bf7\u6c42\u4e2d\u63d0\u4ea4\u6574\u4e2a\u8d44\u6e90\u3002<\/p>\n\n\n\n
\u5982\u679c\u8d44\u6e90\u4e0d\u5b58\u5728\uff0cPUT \u901a\u5e38\u4f1a\u521b\u5efa\u5b83\uff08\u5c3d\u7ba1\u8fd9\u79cd\u884c\u4e3a\u53ef\u80fd\u4f1a\u6709\u6240\u4e0d\u540c\uff09\u3002<\/p>\n\n\n\n
\u5e42\u7b49\uff1a<\/p>\n\n\n\n
\u4f7f\u7528\u76f8\u540c\u6570\u636e\u7684\u91cd\u590d PUT \u8bf7\u6c42\u59cb\u7ec8\u4f1a\u5bfc\u81f4\u76f8\u540c\u7684\u8d44\u6e90\u72b6\u6001\u3002
\u793a\u4f8b\uff1a\u66f4\u65b0\u7528\u6237\u4e2a\u4eba\u8d44\u6599\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
json<\/div>
PUT \/users\/123<\/div>
{<\/div>
"name": "Velislav",<\/div>
"email": "velislav@example.com",<\/div>
"age": 30<\/div>
}<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n

\u5982\u679c\u4ec5\u66f4\u6539\u59d3\u540d\uff0c\u4f46\u7535\u5b50\u90ae\u4ef6\u548c\u5e74\u9f84\u4fdd\u6301\u4e0d\u53d8\uff0c\u5219\u5b83\u4eec\u4ecd\u5fc5\u987b\u51fa\u73b0\u5728\u8bf7\u6c42\u4e2d\u3002<\/p>\n\n\n\n
\u8865\u4e01\uff1a
\u90e8\u5206\u66f4\u65b0\uff1a<\/p>\n\n\n\n
PATCH \u7528\u4e8e\u90e8\u5206\u66f4\u65b0\u73b0\u6709\u8d44\u6e90\u3002
\u4ec5\u5728\u8bf7\u6c42\u4e2d\u53d1\u9001\u66f4\u6539\u7684\u5b57\u6bb5\u3002<\/p>\n\n\n\n
\u5e42\u7b49\uff08\u5927\u90e8\u5206\uff09\uff1a<\/p>\n\n\n\n
\u4e0e PUT \u4e00\u6837\uff0c\u4f7f\u7528\u76f8\u540c\u6570\u636e\u91cd\u590d PATCH \u8bf7\u6c42\u901a\u5e38\u4f1a\u5bfc\u81f4\u76f8\u540c\u7684\u8d44\u6e90\u72b6\u6001\u3002
\u4f46\u662f\uff0c\u884c\u4e3a\u53ef\u80fd\u53d6\u51b3\u4e8e\u670d\u52a1\u5668\u5b9e\u73b0\u3002<\/p>\n\n\n\n
\u793a\u4f8b\uff1a\u4ec5\u66f4\u65b0\u7528\u6237\u540d\uff1a<\/p>\n\n\n
\n\t
\n\t\t
\n\t\t\t\n
\n
json<\/div>
PATCH \/users\/123<\/div>
{<\/div>
"name": "Velislav"<\/div>
}<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n

\u8fd9\u91cc\u53ea\u66f4\u65b0\u4e86name\u5b57\u6bb5\uff0c\u5176\u4ed6\u5b57\u6bb5\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n\n\n\n
\u4e3b\u8981\u533a\u522b\uff1a
PUT \u66ff\u6362\u6574\u4e2a\u8d44\u6e90\uff0c\u800c PATCH \u4ec5\u66f4\u6539\u8d44\u6e90\u7684\u6307\u5b9a\u5b57\u6bb5\u3002<\/p>\n\n\n\n
\n\n\n\n
HTTP \u65b9\u6cd5\u53ca\u5176\u7b80\u8981\u8bf4\u660e\u3002<\/strong><\/h2>\n\n\n\n
GET\uff1a\u7528\u4e8e\u4ece\u670d\u52a1\u5668\u68c0\u7d22\u6570\u636e\u800c\u4e0d\u4fee\u6539\u5b83\u3002\u901a\u5e38\u7528\u4e8e\u83b7\u53d6\u8d44\u6e90\u6216\u4fe1\u606f\u3002
POST\uff1a\u7528\u4e8e\u5411\u670d\u52a1\u5668\u53d1\u9001\u6570\u636e\uff0c\u901a\u5e38\u7528\u4e8e\u521b\u5efa\u65b0\u8d44\u6e90\u3002\u4f8b\u5982\uff0c\u53d1\u9001\u8868\u5355\u6216\u4e0a\u4f20\u6587\u4ef6\u65f6\u3002
PUT\uff1a\u7528\u4e8e\u66f4\u65b0\u6216\u5b8c\u5168\u66ff\u6362\u670d\u52a1\u5668\u4e0a\u73b0\u6709\u7684\u8d44\u6e90\u3002\u5982\u679c\u8d44\u6e90\u4e0d\u5b58\u5728\uff0c\u5219\u53ef\u4ee5\u521b\u5efa\u5b83\u3002
PATCH\uff1a\u7528\u4e8e\u73b0\u6709\u8d44\u6e90\u7684\u90e8\u5206\u66f4\u65b0\uff0c\u4ec5\u4fee\u6539\u6307\u5b9a\u5b57\u6bb5\u3002
DELETE\uff1a\u7528\u4e8e\u4ece\u670d\u52a1\u5668\u5220\u9664\u8d44\u6e90\u3002
HEAD\uff1a\u4e0e GET \u7c7b\u4f3c\uff0c\u7528\u4e8e\u4ec5\u68c0\u7d22\u8d44\u6e90\u7684\u6807\u5934\uff0c\u800c\u4e0d\u68c0\u7d22\u8d44\u6e90\u7684\u6b63\u6587\u3002
OPTIONS\uff1a\u663e\u793a\u5141\u8bb8\u54ea\u4e9b HTTP \u65b9\u6cd5\u3002
TRACE\uff1a\u4e3b\u8981\u7528\u4e8e\u901a\u8fc7\u5c06\u8bf7\u6c42\u56de\u663e\u7ed9\u5ba2\u6237\u7aef\u6765\u8fdb\u884c\u8bca\u65ad\u76ee\u7684
CONNECT\uff1a\u5efa\u7acb\u5230\u670d\u52a1\u5668\u7684\u96a7\u9053\uff0c\u901a\u5e38\u7528\u4e8e SSL\/TLS \u8fde\u63a5\u3002<\/p>\n\n\n\n
\n\n\n\n
\u529f\u80fd\u63a5\u53e3<\/h2>\n\n\n\n
Java \u4e2d\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4ec5\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\u3002\u8fd9\u4e9b\u63a5\u53e3\u4e3b\u8981\u4e0e lambda \u8868\u8fbe\u5f0f\u548c\u65b9\u6cd5\u5f15\u7528\u4e00\u8d77\u4f7f\u7528\uff0c\u4ece\u800c\u5141\u8bb8\u66f4\u77ed\u4e14\u66f4\u5177\u53ef\u8bfb\u6027\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u98ce\u683c\u3002<\/p>\n\n\n\n
\u4e3b\u8981\u7279\u70b9\uff1a<\/h3>\n\n\n\n
    \n
  1. \u5355\u4e00\u62bd\u8c61\u65b9\u6cd5<\/strong>\uff1a\u51fd\u6570\u5f0f\u63a5\u53e3\u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002\u8fd9\u5c31\u662f\u5176\u529f\u80fd\u7684\u672c\u8d28\u3002<\/li>\n\n\n\n
  2. \u9ed8\u8ba4\u548c\u9759\u6001\u65b9\u6cd5<\/strong>\uff1a\u51fd\u6570\u5f0f\u63a5\u53e3\u53ef\u4ee5\u5305\u542b\u9ed8\u8ba4\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5\uff0c\u4f46\u5b83\u4eec\u4e0d\u7b97\u662f\u552f\u4e00\u7684\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n\n\n\n
  3. @FunctionalInterface\u6ce8\u89e3<\/strong>\uff1a\u867d\u7136\u6b64\u6ce8\u91ca\u662f\u53ef\u9009\u7684\uff0c\u4f46\u5b83\u6709\u52a9\u4e8e\u8868\u660e\u7ed9\u5b9a\u7684\u63a5\u53e3\u65e8\u5728\u53d1\u6325\u529f\u80fd\u3002\u5982\u679c\u5411\u63a5\u53e3\u6dfb\u52a0\u5176\u4ed6\u62bd\u8c61\u65b9\u6cd5\uff0c\u7f16\u8bd1\u5668\u4f1a\u629b\u51fa\u9519\u8bef\u3002<\/li>\n<\/ol>\n\n\n\n
    \u4f8b\u5b50\uff1a<\/h3>\n\n\n
    \n\t
    \n\t\t
    \n\t\t\t\n
    \n
    @<\/span>FunctionalInterface<\/span><\/div>
    interface<\/span> Calculator<\/span> {<\/span><\/div>
        int<\/span> calculate<\/span>(<\/span>int<\/span> a<\/span>,<\/span> int<\/span> b<\/span>)<\/span>;<\/span><\/div>
    }<\/span><\/div>
    <\/div>
    \/\/<\/span> Using<\/span> lambda<\/span> expression<\/span><\/div>
    public<\/span> class<\/span> Main<\/span> {<\/span><\/div>
        public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span><\/div>
            \/\/<\/span> Implementing<\/span> the<\/span> calculate<\/span> method<\/span> using<\/span> a<\/span> lambda<\/span><\/div>
            Calculator<\/span> addition<\/span> =<\/span> (<\/span>a<\/span>,<\/span> b<\/span>)<\/span> -><\/span> a<\/span> +<\/span> b<\/span>;<\/span><\/div>
            Calculator<\/span> multiplication<\/span> =<\/span> (<\/span>a<\/span>,<\/span> b<\/span>)<\/span> -><\/span> a<\/span> *<\/span> b<\/span>;<\/span><\/div>
    <\/div>
            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Addition: "<\/span> +<\/span> <\/div>
            addition<\/span>.<\/span>calculate<\/span>(<\/span>5<\/span>,<\/span> 3<\/span>))<\/span>;<\/span>  \/\/<\/span> Output: 8<\/span><\/div>
            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>"Multiplication: "<\/span> +<\/span> <\/div>
            multiplication<\/span>.<\/span>calculate<\/span>(<\/span>5<\/span>,<\/span> 3<\/span>))<\/span>;<\/span>  \/\/<\/span> Output: 15<\/span><\/div>
        }<\/span><\/div>
    }<\/span><\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
    \u4f7f\u7528\u6848\u4f8b\uff1a<\/h3>\n\n\n\n
    \u754c\u9762 Calculator<\/code> \u5728\u793a\u4f8b\u4e2d\u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5 calculate<\/code>\uff0c\u8fd9\u4f7f\u5176\u6210\u4e3a\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\u3002
    \u8fd9\u5141\u8bb8\u6211\u4eec\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u6765\u5b9e\u73b0\u66f4\u77ed\u3001\u66f4\u4f18\u96c5\u7684\u5b9e\u73b0\u3002<\/p>\n\n\n\n
    Java\u4e2d\u5e38\u7528\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\uff1a<\/h3>\n\n\n\n
    Java\u5305\u4e2d\u63d0\u4f9b\u4e86\u51e0\u4e2a\u5185\u7f6e\u7684\u51fd\u6570\u63a5\u53e3 java.util.function<\/code>\uff0c \u4f8b\u5982\uff1a<\/p>\n\n\n\n
      \n
    • \u8c13\u8bcd<\/strong>\uff1a\u63a5\u53d7\u8f93\u5165\u5e76\u8fd4\u56de\u5e03\u5c14\u503c\u3002<\/li>\n\n\n\n
    • \u529f\u80fd<\/strong>\uff1a\u63a5\u53d7\u8f93\u5165\u5e76\u8fd4\u56de R \u7c7b\u578b\u7684\u7ed3\u679c\u3002<\/li>\n\n\n\n
    • \u4f9b\u5e94\u5546<\/strong>\uff1a\u63d0\u4f9b\u4e00\u4e2a\u6ca1\u6709\u8f93\u5165\u7684\u503c\u3002<\/li>\n\n\n\n
    • \u6d88\u8d39\u8005<\/strong>\uff1a\u83b7\u53d6\u4e00\u4e2a\u503c\u5e76\u6267\u884c\u4e00\u4e2a\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n
      \u51fd\u6570\u5f0f\u63a5\u53e3\u4f7f\u5de5\u4f5c\u53d8\u5f97\u66f4\u52a0\u5bb9\u6613\uff0c\u5c24\u5176\u662f\u5728\u4f7f\u7528\u96c6\u5408\u3001\u6d41\u6216\u5f02\u6b65\u4efb\u52a1\u7b49\u573a\u666f\u4e2d\u3002<\/p>\n\n\n\n
      \u5b83\u4eec\u5141\u8bb8 Java \u91c7\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u4f8b\uff0c\u540c\u65f6\u4fdd\u7559\u5176\u9762\u5411\u5bf9\u8c61\u7684\u7279\u6027\u3002<\/h2>\n\n\n\n
      \n\n\n\n
      \u4ec0\u4e48\u662f\u9ad8\u9636\u51fd\u6570\uff1f<\/h2>\n\n\n\n
      \u9ad8\u9636\u51fd\u6570\u662f\u4e00\u79cd\u63a5\u53d7\u5176\u4ed6\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u5176\u7ed3\u679c\u7684\u51fd\u6570\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5b83\u4ee5\u529f\u80fd\u8fd0\u4f5c\uff0c\u5c06\u5176\u89c6\u4e3a\u201c\u4e00\u7b49\u516c\u6c11\u201d\u3002\u8fd9\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u4f8b\u4e2d\u7684\u4e00\u4e2a\u5f3a\u5927\u529f\u80fd\uff0c\u53ef\u4ee5\u5b9e\u73b0\u62bd\u8c61\u3001\u4ee3\u7801\u91cd\u7528\u548c\u7ec4\u5408\u3002<\/p>\n\n\n\n
      Java \u4e2d\u9ad8\u9636\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/h3>\n\n\n
      \n\t
      \n\t\t
      \n\t\t\t\n
      \n
      import java.util.function.Function;<\/div>
      <\/div>
      public class Main {<\/div>
          public static void main(String[] args) {<\/div>
              \/\/ Higher-order function: applies a function to a value<\/div>
              Function<<\/span>Integer<\/span>,<\/span> Integer<\/span>><\/span> squareFunction = x -> x * x;<\/div>
              int result = applyFunction(5, squareFunction);<\/div>
              System.out.println("Square of 5: " + result);  <\/div>
                \/\/ Output: 25<\/div>
          }<\/div>
      <\/div>
          public static int applyFunction(int value, <\/div>
          Function<<\/span>Integer<\/span>,<\/span> Integer<\/span>><\/span> function) {<\/div>
              return function.apply(value);<\/div>
          }<\/div>
      }<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
      \u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff1a<\/p>\n\n\n\n
        \n
      • \u65b9\u6cd5 applyFunction<\/code> \u662f\u4e00\u4e2a\u9ad8\u9636\u51fd\u6570\uff0c\u56e0\u4e3a\u5b83\u63a5\u53d7\u53e6\u4e00\u4e2a\u51fd\u6570 (Function<Integer, Integer><\/code>) \u4f5c\u4e3a\u53c2\u6570\u3002<\/li>\n<\/ul>\n\n\n\n
        \u7279\u5f81\uff1a<\/h3>\n\n\n\n
          \n
        1. \u63a5\u53d7\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570<\/strong>\uff1a\u9ad8\u9636\u51fd\u6570\u53ef\u4ee5\u63a5\u53d7\u5176\u4ed6\u51fd\u6570\u4f5c\u4e3a\u8f93\u5165\u6765\u6267\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u3002<\/li>\n\n\n\n
        2. \u8fd4\u56de\u51fd\u6570<\/strong>\uff1a\u5b83\u4eec\u53ef\u4ee5\u52a8\u6001\u751f\u6210\u5e76\u8fd4\u56de\u65b0\u51fd\u6570\u3002<\/li>\n\n\n\n
        3. \u9f13\u52b1\u4ee3\u7801\u91cd\u7528<\/strong>\uff1a\u4fc3\u8fdb\u6a21\u5757\u5316\u548c\u53ef\u91cd\u7528\u4ee3\u7801\uff0c\u56e0\u4e3a\u51fd\u6570\u53ef\u4ee5\u4f20\u9012\u5e76\u76f8\u4e92\u7ec4\u5408\u3002<\/li>\n<\/ol>\n\n\n\n
          \u4f7f\u7528\u6848\u4f8b\uff1a<\/h3>\n\n\n\n
          \u5728 Java \u4e2d\uff0c\u9ad8\u9636\u51fd\u6570\u901a\u5e38\u7528\u4e8e\u6d41\u3001lambda \u548c\u65b9\u6cd5\u5f15\u7528\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n
          \n\t
          \n\t\t
          \n\t\t\t\n
          \n
          List<<\/span>String<\/span>><\/span> names = Arrays.asList("John", "Jane", "Jake");<\/div>
          names.stream()<\/div>
               .filter(name -> name.startsWith("J"))  <\/div>
               \/\/ Takes a lambda function as argument<\/div>
               .forEach(System.out::println);         <\/div>
            \/\/ Takes a method reference as argument<\/div><\/code><\/pre>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n
          \u9ad8\u9636\u51fd\u6570\u4e3a Java \u7a0b\u5e8f\u589e\u6dfb\u4e86\u7075\u6d3b\u6027\u548c\u5f3a\u5927\u529f\u80fd\uff0c\u4f7f\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u7f16\u5199\u5e72\u51c0\u3001\u7b80\u6d01\u4e14\u5bcc\u6709\u8868\u73b0\u529b\u7684\u4ee3\u7801\uff01<\/h2>\n\n\n\n
          \n\n\n\n
          \u4e00\u4e9b\u771f\u5b9e\u7684\u4f8b\u5b50\u548c\u91c7\u8bbf\u7684\u7b54\u6848<\/h2>\n\n\n\n
            \n
          • \u4e86\u89e3\u591a\u6001\u6027\u3001\u9759\u6001\u65b9\u6cd5\u548c\u5b57\u7b26\u4e32\u6c60\u7b49\u57fa\u7840\u77e5\u8bc6<\/li>\n\n\n\n
          • \u719f\u6089\u96c6\u5408\uff08\u4f8b\u5982 HashSet\u3001TreeSet\uff09\u53ca\u5176\u7528\u4f8b\u3002<\/li>\n\n\n\n
          • \u6b63\u786e\u8bc6\u522bbean\u8303\u56f4\uff08\u5355\u4f8b\u3001\u539f\u578b\uff09<\/li>\n\n\n\n
          • \u4e86\u89e3\u4ec0\u4e48\u662f\u4f9d\u8d56\u6ce8\u5165\u53ca\u5176\u76ee\u7684\u3002<\/li>\n\n\n\n
          • \u77e5\u9053\u5982\u4f55\u4f7f\u7528\u8054\u7ed3\u8868\u5b9e\u73b0\u591a\u5bf9\u591a\u5173\u7cfb\u3002<\/li>\n\n\n\n
          • \u4e86\u89e3\u7d22\u5f15\u7684\u7528\u9014\uff08\u5c3d\u7ba1\u662f\u8868\u9762\u4e0a\u7684\uff09<\/li>\n\n\n\n
          • \u53ef\u4ee5\u533a\u5206\u5355\u4f53\u67b6\u6784\u548c\u5fae\u670d\u52a1\u67b6\u6784<\/li>\n\n\n\n
          • \u4e86\u89e3\u57fa\u672c\u7684\u6743\u8861\uff08\u53ef\u6269\u5c55\u6027\u3001\u53ef\u7ef4\u62a4\u6027\uff09<\/li>\n\n\n\n
          • \u6ca1\u6709\u6b63\u786e\u7406\u89e3\u91cc\u6c0f\u66ff\u6362\u539f\u7406\u548c\u4f9d\u8d56\u5012\u7f6e<\/li>\n\n\n\n
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          • \u4e0d\u719f\u6089\u9694\u79bb\u7ea7\u522b\u548c\u4e50\u89c2\/\u60b2\u89c2\u9501\u5b9a\u3002<\/li>\n<\/ul>\n\n\n\n
            \u4f18\u70b9\uff1a<\/p>\n\n\n\n
              \n
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            • \u4ed6\u719f\u6089SOLID\u3002<\/li>\n\n\n\n
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            • \u826f\u597d\u7684\u82f1\u8bed\u6c34\u5e73
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            • \u65e0\u6cd5\u89e3\u91ca\u6d3b\u9501\u3002<\/li>\n\n\n\n
            • \u5bf9finally\u5757\u7684\u7406\u89e3\u5b58\u5728\u5dee\u8ddd\u3002<\/li>\n\n\n\n
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            • \u89e3\u91ca\u5f97\u5f88\u597d\u5f88\u624e\u5b9e\u3002<\/li>\n\n\n\n
            • \u5f88\u597d\u5730\u89e3\u91ca\u4e86OOP\u3002<\/li>\n\n\n\n
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            • \u8ba8\u8bba\u54c8\u5e0c\u96c6\u3002<\/li>\n\n\n\n
            • \u8ba8\u8bba HashMap\u3002<\/li>\n\n\n\n
            • \u8ba8\u8bba ConcurrentHashMap\u3002<\/li>\n\n\n\n
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            • \u5bf9 JVM \u67b6\u6784\u6709\u5f88\u597d\u7684\u4e86\u89e3\u3002<\/li>\n\n\n\n
            • \u5f88\u597d\u5730\u89e3\u91ca\u4e86\u5e76\u53d1\u4e0e\u5e76\u884c\uff0c\u5c55\u793a\u4e86\u5bf9\u591a\u7ebf\u7a0b\u5e94\u7528\u7a0b\u5e8f\u7684\u826f\u597d\u4e86\u89e3\u3002<\/li>\n\n\n\n
            • \u5bf9 REST \u6709\u5f88\u597d\u7684\u7406\u89e3\u3002<\/li>\n\n\n\n
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