{"id":5740,"date":"2024-08-01T22:47:33","date_gmt":"2024-08-01T14:47:33","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=5740"},"modified":"2024-08-02T16:03:50","modified_gmt":"2024-08-02T08:03:50","slug":"%e6%8e%8c%e6%8f%a1spring-mvc%e4%b8%ad%e8%87%aa%e5%ae%9a%e4%b9%89%e6%b3%a8%e8%a7%a3%e7%9a%84%e5%a6%99%e7%94%a8%ef%bc%8c%e4%b8%ba%e4%bd%a0%e7%9a%84%e4%bb%a3%e7%a0%81%e5%a2%9e%e6%b7%bb%e6%95%b4%e6%b4%81","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/spring-boot\/%e6%8e%8c%e6%8f%a1spring-mvc%e4%b8%ad%e8%87%aa%e5%ae%9a%e4%b9%89%e6%b3%a8%e8%a7%a3%e7%9a%84%e5%a6%99%e7%94%a8%ef%bc%8c%e4%b8%ba%e4%bd%a0%e7%9a%84%e4%bb%a3%e7%a0%81%e5%a2%9e%e6%b7%bb%e6%95%b4%e6%b4%81\/","title":{"rendered":"\u638c\u63e1Spring MVC\u4e2d\u81ea\u5b9a\u4e49\u6ce8\u89e3\u7684\u5999\u7528\uff0c\u4e3a\u4f60\u7684\u4ee3\u7801\u589e\u6dfb\u6574\u6d01\u4e0e\u4f18\u96c5\u3002"},"content":{"rendered":"
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\u6ce8\u89e3\u4ecb\u7ecd<\/span><\/strong><\/span><\/section>\n

\u5728Spring MVC\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u81ea\u5b9a\u4e49\u6ce8\u89e3\u6765\u6269\u5c55\u548c\u5b9a\u5236\u5316\u6211\u4eec\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u81ea\u5b9a\u4e49\u6ce8\u89e3\u662f\u4e00\u79cd\u901a\u8fc7Java\u7684\u6ce8\u89e3\u673a\u5236\u5b9a\u4e49\u7684\u7279\u6b8a\u6ce8\u89e3\uff0c\u53ef\u4ee5\u5e94\u7528\u4e8e\u63a7\u5236\u5668\u7c7b\u3001\u65b9\u6cd5\u6216\u8005\u65b9\u6cd5\u53c2\u6570\u4e0a\uff0c\u4ee5\u5b9e\u73b0\u4e0d\u540c\u7684\u529f\u80fd\u548c\u884c\u4e3a\u3002<\/span><\/p>\n

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\u65e5\u5fd7\u8bb0\u5f55\uff1a<\/strong>\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u81ea\u5b9a\u4e49\u6ce8\u89e3\uff0c\u7528\u4e8e\u6807\u8bb0\u9700\u8981\u8fdb\u884c\u65e5\u5fd7\u8bb0\u5f55\u7684\u65b9\u6cd5\uff0c\u4ece\u800c\u5b9e\u73b0\u65e5\u5fd7\u7684\u7edf\u4e00\u5904\u7406\u3002<\/span><\/p>\n

\u7f13\u5b58\u63a7\u5236\uff1a<\/strong>\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u81ea\u5b9a\u4e49\u6ce8\u89e3\uff0c\u7528\u4e8e\u6807\u8bb0\u9700\u8981\u8fdb\u884c\u7f13\u5b58\u7ba1\u7406\u7684\u65b9\u6cd5\uff0c\u4ece\u800c\u5b9e\u73b0\u7f13\u5b58\u7684\u81ea\u52a8\u5316\u7ba1\u7406\u3002<\/span><\/p>\n

\u4f7f\u7528\u81ea\u5b9a\u4e49\u6ce8\u89e3\u6d41\u7a0b<\/span><\/strong><\/span><\/section>\n

\u5b9a\u4e49\u6ce8\u89e3\uff1a<\/strong>\u4f7f\u7528\u6ce8\u89e3\u8bed\u6cd5\uff0c\u5728\u76f8\u5173\u7684\u6ce8\u89e3\u7c7b\u4e0a\u5b9a\u4e49\u81ea\u5b9a\u4e49\u6ce8\u89e3\uff0c\u53ef\u4ee5\u6307\u5b9a\u6ce8\u89e3\u7684\u76ee\u6807\u8303\u56f4\u548c\u5c5e\u6027\u3002<\/span><\/p>\n

\u6807\u8bb0\u4f7f\u7528\uff1a<\/strong>\u5728\u63a7\u5236\u5668\u7c7b\u3001\u65b9\u6cd5\u6216\u8005\u65b9\u6cd5\u53c2\u6570\u4e0a\u4f7f\u7528\u81ea\u5b9a\u4e49\u6ce8\u89e3\uff0c\u6807\u8bc6\u9700\u8981\u5e94\u7528\u81ea\u5b9a\u4e49\u903b\u8f91\u7684\u5730\u65b9\u3002<\/span><\/p>\n

\u5904\u7406\u6ce8\u89e3\uff1a<\/strong>\u901a\u8fc7Spring\u7684AOP\u3001\u62e6\u622a\u5668\u7b49\u673a\u5236\uff0c\u5bf9\u6807\u8bb0\u4e86\u7279\u5b9a\u81ea\u5b9a\u4e49\u6ce8\u89e3\u7684\u7c7b\u3001\u65b9\u6cd5\u6216\u8005\u53c2\u6570\u8fdb\u884c\u5904\u7406\uff0c\u5b9e\u73b0\u76f8\u5173\u7684\u529f\u80fd\u3002<\/span><\/p>\n

JDK\u5143\u6ce8\u89e3<\/span><\/strong><\/span><\/section>\n
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@Retention\uff1a\u5b9a\u4e49\u6ce8\u89e3\u7684\u4fdd\u7559\u7b56\u7565<\/span><\/code>@Retention(RetentionPolicy.SOURCE)    \/\/\u6ce8\u89e3\u4ec5\u5b58\u5728\u4e8e\u6e90\u7801\u4e2d\uff0c\u5728class\u5b57\u8282\u7801\u6587\u4ef6\u4e2d\u4e0d\u5305\u542b<\/span><\/code>@Retention(RetentionPolicy.CLASS)     \/\/\u9ed8\u8ba4\u7684\u4fdd\u7559\u7b56\u7565\uff0c\u6ce8\u89e3\u4f1a\u5728class\u5b57\u8282\u7801\u6587\u4ef6\u4e2d\u5b58\u5728\uff0c\u4f46\u8fd0\u884c\u65f6\u65e0\u6cd5\u83b7\u5f97\uff0c<\/span><\/code>@Retention(RetentionPolicy.RUNTIME)\/\/\u6ce8\u89e3\u4f1a\u5728class\u5b57\u8282\u7801\u6587\u4ef6\u4e2d\u5b58\u5728\uff0c\u5728\u8fd0\u884c\u65f6\u53ef\u4ee5\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u5230<\/span><\/code><\/code>@Target\uff1a\u6307\u5b9a\u88ab\u4fee\u9970\u7684Annotation\u53ef\u4ee5\u653e\u7f6e\u7684\u4f4d\u7f6e(\u88ab\u4fee\u9970\u7684\u76ee\u6807)<\/span><\/code>@Target(ElementType.TYPE)                      \/\/\u63a5\u53e3\u3001\u7c7b<\/span><\/code>@Target(ElementType.FIELD)                     \/\/\u5c5e\u6027<\/span><\/code>@Target(ElementType.METHOD)                    \/\/\u65b9\u6cd5<\/span><\/code>@Target(ElementType.PARAMETER)                 \/\/\u65b9\u6cd5\u53c2\u6570<\/span><\/code>@Target(ElementType.CONSTRUCTOR)               \/\/\u6784\u9020\u51fd\u6570<\/span><\/code>@Target(ElementType.LOCAL_VARIABLE)            \/\/\u5c40\u90e8\u53d8\u91cf<\/span><\/code>@Target(ElementType.ANNOTATION_TYPE)           \/\/\u6ce8\u89e3<\/span><\/code>@Target(ElementType.PACKAGE)\/\/\u5305<\/span><\/code><\/code>@Inherited\uff1a\u6307\u5b9a\u88ab\u4fee\u9970\u7684Annotation\u5c06\u5177\u6709\u7ee7\u627f\u6027<\/span><\/code><\/code>@Documented\uff1a\u6307\u5b9a\u88ab\u4fee\u9970\u7684\u8be5Annotation\u53ef\u4ee5\u88abjavadoc\u5de5\u5177\u63d0\u53d6\u6210\u6587\u6863.<\/span><\/code><\/pre>\n<\/section>\n
\u53ef\u80fd\u6709\u7684\u540c\u5b66\u770b\u5230\u8fd9\u4e48\u591a\u6709\u70b9\u8499\uff0c\u5176\u5b9e\u5927\u53ef\u4e0d\u5fc5\uff0c\u5b9e\u9645\u5f00\u53d1\u4e2d\u5e38\u7528\u7684\u4e5f\u5c31\u51e0\u4e2a\u3002\u4e0b\u9762\u6211\u4eec\u4e00\u5757\u6765\u770b\u4e0b\u600e\u4e48\u58f0\u660e\u548c\u4f7f\u7528\u6ce8\u89e3\u3002<\/span><\/p>\n
\u58f0\u660e\u6ce8\u89e3<\/span><\/strong><\/span><\/section>\n
\u4f7f\u7528@interface\u5173\u952e\u5b57 \u6765\u58f0\u660e\u6ce8\u89e3<\/span><\/p>\n
\u793a\u4f8b\uff1a<\/span><\/p>\n
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2\u3001\u59cb\u7ec8\u4e0d\u4f1a\u4e22\u5f03\uff0c\u8fd0\u884c\u671f\u4e5f\u4fdd\u7559\u8be5\u6ce8\u89e3\u3002<\/span><\/p>\n
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package com.mkj.publicservice.utils.annotationtest;<\/span><\/code><\/code>import java.lang.annotation.*;<\/span><\/code><\/code>\/**<\/span><\/code> * @author: mkj<\/span><\/code> *\/<\/span><\/code>@Target({ElementType.TYPE,ElementType.METHOD,ElementType.FIELD,ElementType.PARAMETER})<\/span><\/code>@Retention(RetentionPolicy.RUNTIME)<\/span><\/code>@Inherited<\/span><\/code>public @interface MyAnnotateOne {<\/span><\/code>    \/\/\u8fd4\u56de\u7c7b\u578b\u81ea\u5b9a\u4e49\u5373\u53ef<\/span><\/code>    String classTest() default \"classTest\";<\/span><\/code>    String[] methodTest() default \"methodTest\";<\/span><\/code>    String fieldTest() default \"fieldTest\";<\/span><\/code>    String parameterTest() default \"parameterTest\";<\/span><\/code>}<\/span><\/code><\/code><\/pre>\n<\/section>\n
\u4f7f\u7528\u6ce8\u89e3<\/span><\/strong><\/span><\/section>\n
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@MyAnnotateOne(classTest = \"classTest001\")<\/span><\/code>public class AnnotateTest {<\/span><\/code>    @MyAnnotateOne(classTest = \"classTest001\",fieldTest = \"fieldTest001\")<\/span><\/code>    private String name;<\/span><\/code>    @MyAnnotateOne(methodTest = {\"methodTest001\",\"methodTest002\"})<\/span><\/code>    public void test001(@MyAnnotateOne(parameterTest = \"parameterTest001\") String params){<\/span><\/code>        System.out.println(params);<\/span><\/code>    }<\/span><\/code>}<\/span><\/code><\/pre>\n<\/section>\n
\u6d4b\u8bd5\u6ce8\u89e3<\/span><\/strong><\/span><\/section>\n
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@Test<\/span><\/code>    public void test() throws Exception {<\/span><\/code>        \/\/\u83b7\u53d6\u7c7b\u4e0a\u7684\u6ce8\u89e3<\/span><\/code>        MyAnnotateOne myAnnotateClass = AnnotateTest.class.getAnnotation(MyAnnotateOne.class);<\/span><\/code>        System.out.println(\"\u7c7b\u4e0a\u7684\u6ce8\u89e3--\"+myAnnotateClass.classTest());<\/span><\/code>        \/\/\u83b7\u53d6\u5c5e\u6027\u6ce8\u89e3<\/span><\/code>        MyAnnotateOne myAnnotateField =AnnotateTest.class.getDeclaredField(\"name\").getAnnotation(MyAnnotateOne.class);<\/span><\/code>        System.out.println(\"\u5c5e\u6027\u6ce8\u89e3\"+myAnnotateField.classTest()+\"--\"+myAnnotateField.fieldTest());<\/span><\/code>        \/\/\u83b7\u53d6\u65b9\u6cd5\u4e0a\u7684\u6ce8\u89e3<\/span><\/code>        MyAnnotateOne myAnnotateMethod =AnnotateTest.class.getMethod(\"test001\",String.class).getAnnotation(MyAnnotateOne.class);<\/span><\/code>        String methodStr = \"\";<\/span><\/code>        for (String methodVlaue : myAnnotateMethod.methodTest()){<\/span><\/code>            methodStr+=methodVlaue+\",\";<\/span><\/code>        }<\/span><\/code>        System.out.println(\"\u65b9\u6cd5\u4e0a\u7684\u6ce8\u89e3\"+methodStr);<\/span><\/code>        \/\/\u83b7\u53d6\u53c2\u6570\u4e0a\u7684\u6ce8\u89e3<\/span><\/code>        Parameter[] parameters = AnnotateTest.class.getMethod(\"test001\",String.class).getParameters();<\/span><\/code>        for (Parameter parameter : parameters){<\/span><\/code>            MyAnnotateOne myAnnotateParameter = parameter.getAnnotation(MyAnnotateOne.class);<\/span><\/code>            if (myAnnotateParameter!=null){<\/span><\/code>                System.out.println(\"\u53c2\u6570\u4e0a\u7684\u6ce8\u89e3\"+myAnnotateParameter.parameterTest());<\/span><\/code>            }<\/span><\/code>        }<\/span><\/code><\/code>    }<\/span><\/code><\/pre>\n<\/section>\n
\u8f93\u5165\u7ed3\u679c\u5982\u4e0b\uff1a<\/span><\/p>\n