Java\u6ce8\u89e3\uff08Annotation\uff09\u662fJava\u8bed\u8a00\u4e2d\u7684\u4e00\u79cd\u5143\u6570\u636e\uff0c\u5b83\u4e3a\u4ee3\u7801\u6dfb\u52a0\u4e86\u66f4\u591a\u7684\u4fe1\u606f\uff0c\u4ee5\u4fbf\u4e8e\u5728\u7f16\u8bd1\u3001\u8fd0\u884c\u65f6\u6216\u8005\u662f\u5728\u4ee3\u7801\u751f\u6210\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u89e3\u6790\u548c\u5904\u7406\u3002\u5728Java\u9886\u57df\uff0c\u6ce8\u89e3\u5df2\u7ecf\u6210\u4e3a\u4e86\u5f00\u53d1\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8Java\u6ce8\u89e3\u7684\u539f\u7406\u3001\u4f5c\u7528\u4ee5\u53ca\u5b9e\u9645\u5e94\u7528\u573a\u666f\uff0c\u5e76\u63d0\u4f9b\u4e09\u4e2a\u5177\u4f53\u7684\u4f7f\u7528\u793a\u4f8b\u3002<\/p>\n\n\n\n
Java\u6ce8\u89e3\u672c\u8d28\u4e0a\u662f\u4e00\u79cd\u63a5\u53e3\uff0c\u5b83\u53ef\u4ee5\u5305\u542b\u5143\u6570\u636e\uff0c\u7528\u4e8e\u63cf\u8ff0\u7a0b\u5e8f\u7684\u884c\u4e3a\u3002\u5728Java\u4e2d\uff0c\u6ce8\u89e3\u901a\u8fc7 Java\u6ce8\u89e3\u7684\u539f\u7406\u57fa\u4e8e\u53cd\u5c04\u673a\u5236\u3002\u5728\u8fd0\u884c\u65f6\uff0c\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u53cd\u5c04\u673a\u5236\u83b7\u53d6\u7c7b\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\u7b49\u7684\u6ce8\u89e3\u4fe1\u606f\uff0c\u4ece\u800c\u6839\u636e\u6ce8\u89e3\u7684\u5185\u5bb9\u6267\u884c\u76f8\u5e94\u7684\u903b\u8f91\u3002\u8fd9\u79cd\u673a\u5236\u4f7f\u5f97Java\u6ce8\u89e3\u975e\u5e38\u7075\u6d3b\uff0c\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u5404\u79cd\u4e0d\u540c\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n \u6ce8\u89e3\u4e5f\u53eb\u5143\u6570\u636e\uff0c\u4f8b\u5982\u6211\u4eec\u5e38\u89c1\u7684@Override\u548c@Deprecated\uff0c\u6ce8\u89e3\u662fJDK1.5\u7248\u672c\u5f00\u59cb\u5f15\u5165\u7684\u4e00\u4e2a\u7279\u6027\uff0c\u7528\u4e8e\u5bf9\u4ee3\u7801\u8fdb\u884c\u8bf4\u660e\uff0c\u53ef\u4ee5\u5bf9\u5305\u3001\u7c7b\u3001\u63a5\u53e3\u3001\u5b57\u6bb5\u3001\u65b9\u6cd5\u53c2\u6570\u3001\u5c40\u90e8\u53d8\u91cf\u7b49\u8fdb\u884c\u6ce8\u89e3<\/p>\n\n\n\n \u4e00\u822c\u5e38\u7528\u7684\u6ce8\u89e3\u53ef\u4ee5\u5206\u4e3a\u4e09\u7c7b\uff1a<\/p>\n\n\n\n Java\u6ce8\u89e3\u4e3b\u8981\u6709\u4ee5\u4e0b\u51e0\u79cd\u4f5c\u7528\uff1a<\/p>\n\n\n\n Java\u6ce8\u89e3\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u5e38\u89c1\u7684\u573a\u666f\u5305\u62ec\uff1a<\/p>\n\n\n\n Java\u6ce8\u89e3\uff08Annotation\uff09\u662fJava\u8bed\u8a00\u4e2d\u7684\u4e00\u79cd\u5143\u6570\u636e\uff0c\u5b83\u4e3a\u4ee3\u7801\u6dfb\u52a0\u4e86\u66f4\u591a\u7684\u4fe1\u606f\uff0c\u4ee5\u4fbf\u4e8e\u5728\u7f16\u8bd1\u3001\u8fd0\u884c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118],"tags":[16],"class_list":["post-3229","post","type-post","status-publish","format-standard","hentry","category-118","tag-java"],"yoast_head":"\n@<\/code>\u7b26\u53f7\u6765\u6807\u8bc6\uff0c\u901a\u5e38\u7d27\u8ddf\u5728\u7c7b\u3001\u65b9\u6cd5\u3001\u5b57\u6bb5\u6216\u5176\u4ed6\u5143\u7d20\u7684\u58f0\u660e\u4e4b\u524d\u3002\u7f16\u8bd1\u5668\u548c\u5176\u4ed6\u5de5\u5177\u53ef\u4ee5\u901a\u8fc7\u6ce8\u89e3\u6765\u83b7\u53d6\u989d\u5916\u7684\u4fe1\u606f\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u52a0\u667a\u80fd\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n\n
\u4e8c. Java\u6ce8\u89e3\u7684\u4f5c\u7528<\/h5>\n\n\n\n
\n
\u4e09. Java\u6ce8\u89e3\u7684\u5b9e\u9645\u5e94\u7528\u573a\u666f<\/h5>\n\n\n\n
\n
@Entity<\/code>\u3001@Table<\/code>\u6ce8\u89e3\u5c31\u7528\u4e8e\u6307\u5b9a\u5b9e\u4f53\u7c7b\u5bf9\u5e94\u7684\u6570\u636e\u5e93\u8868\u3002<\/li>\n\n\n\n@RequestMapping<\/code>\u6ce8\u89e3\u53ef\u4ee5\u7528\u4e8e\u63cf\u8ff0Controller\u4e2d\u7684\u8bf7\u6c42\u6620\u5c04\u5173\u7cfb\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7\u5de5\u5177\u81ea\u52a8\u751f\u6210API\u6587\u6863\u3002<\/li>\n\n\n\n\u56db. \u5b9e\u9645\u4f7f\u7528\u573a\u666f\u793a\u4f8b<\/h5>\n\n\n\n
\u573a\u666f\u4e00\uff1a\u81ea\u5b9a\u4e49\u6ce8\u89e3\u5b9e\u73b0\u6743\u9650\u63a7\u5236<\/h6>\n\n\n\n
import java.lang.annotation.*;\n\n@Retention(RetentionPolicy.RUNTIME)\n@Target(ElementType.METHOD)\npublic @interface RequiresPermission {\n String value();\n}\n\npublic class PermissionChecker {\n public static void checkPermission(String permission) {\n \/\/ \u6743\u9650\u68c0\u67e5\u903b\u8f91\n }\n}\n\npublic class UserController {\n @RequiresPermission(\"user:view\")\n public void viewUser() {\n PermissionChecker.checkPermission(\"user:view\");\n \/\/ \u663e\u793a\u7528\u6237\u4fe1\u606f\n }\n}<\/code><\/pre>\n\n\n\n\u573a\u666f\u4e8c\uff1a\u4f7f\u7528\u6ce8\u89e3\u7b80\u5316\u914d\u7f6e\u6587\u4ef6\u8bfb\u53d6<\/h6>\n\n\n\n
import java.lang.annotation.*;
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface ConfigField {
String value();
}
public class AppConfig {
@ConfigField(\"database.url\")
private String dbUrl;
@ConfigField(\"database.username\")
private String dbUsername;
@ConfigField(\"database.password\")
private String dbPassword;
\/\/ \u7701\u7565getter\u548csetter\u65b9\u6cd5
}
public class ConfigReader {
public static void readConfig(Object obj) {
\/\/ \u8bfb\u53d6\u914d\u7f6e\u6587\u4ef6\u5e76\u6ce8\u5165\u503c
}
}
<\/code><\/pre>\n\n\n\n\u573a\u666f\u4e09\uff1a\u4f7f\u7528\u6ce8\u89e3\u5b9e\u73b0\u81ea\u5b9a\u4e49Aspect<\/h6>\n\n\n\n
import java.lang.annotation.*;\n\n@Retention(RetentionPolicy.RUNTIME)\n@Target(ElementType.METHOD)\npublic @interface LogExecutionTime {\n}\n\npublic class LoggingAspect {\n @Around(\"@annotation(LogExecutionTime)\")\n public Object logExecutionTime(ProceedingJoinPoint joinPoint) throws Throwable {\n long startTime = System.currentTimeMillis();\n Object result = joinPoint.proceed();\n long endTime = System.currentTimeMillis();\n System.out.println(joinPoint.getSignature() + \" executed in \" + (endTime - startTime) + \" ms\");\n return result;\n }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"