通过反射获取注解的属性值（源代码)

package com.tedu.test; import com.tedu.anno.Cherry; import com.tedu.use_anno.ParameterNameTest; import java.lang.annotation.Annotation; import java.lang.reflect.Method; import java.util.Arrays; public class GetAnnoPropertyValueAtMethodParameter { public static void main(String[] args) throws NoSuchMethodException { Class clazz = ParameterNameTest.class; //获取“方法参数”上的注解的值 Method method = clazz.getDeclaredMethod("method2", String.class, String.class); String[] parameterNames = getMethodParameterNamesByAnnotation(method); System.out.println("\"方法参数\"上的注解值获取到"+ Arrays.toString(parameterNames)); } /** ​ * 获取给 "方法参数" 注解的值 ​ * @param method 要获取参数名的方法 ​ * @return 按参数顺序排列的参数名列表 ​ */ public static String[] getMethodParameterNamesByAnnotation(Method method) { Annotation[][] parameterAnnotations = method.getParameterAnnotations(); if (parameterAnnotations == null || parameterAnnotations.length == 0) { return null; } String[] parameterNames = new String[parameterAnnotations.length]; int i = 0; for (Annotation[] parameterAnnotation : parameterAnnotations) { for (Annotation annotation : parameterAnnotation) { if (annotation instanceof Cherry) { Cherry param = (Cherry) annotation; parameterNames[i++] = param.value(); } } } return parameterNames; } }