1 package com.coscon.reflectionTest; 2  3 import java.lang.reflect.Method; 4 import java.lang.reflect.ParameterizedType; 5 import java.lang.reflect.Type; 6 import java.util.List; 7 import java.util.Map; 8  9 //用过反射获取泛型信息10 public class ReflectionForGenerics {11     public void test01(Map<String,User> map,List<User> users){12         System.out.println("test01");13     }14     15     public Map<Integer,User> test02(){16         System.out.println("test02");17         return null;18     }19     20     public static void main(String[] args) {21         try {22             Class clazz = Class.forName("com.coscon.reflectionTest.ReflectionForGenerics");23             //获得指定方法参数泛型信息24             Method method = clazz.getMethod("test01", Map.class,List.class);25             //获取泛型参数26             Type[] types = method.getGenericParameterTypes();27             for (Type type : types) {28                 System.out.println("#"+type);29                 if(type instanceof ParameterizedType){30                     Type[] actualTypeArguments = ((ParameterizedType) type).getActualTypeArguments();31                     for (Type type2 : actualTypeArguments) {32                         System.out.println("泛型参数类型："+type2);33                     }34                 }35             }36             37             System.out.println("--------------------------------------------------------------");38             Method method2 = clazz.getMethod("test02", null);39             //获取返回值泛型信息40             Type returnType = method2.getGenericReturnType();41             System.out.println("#"+returnType);42             if(returnType instanceof ParameterizedType){43                 Type[] typeArguments = ((ParameterizedType) returnType).getActualTypeArguments();44                 for (Type type : typeArguments) {45                     System.out.println("返回值泛型类型："+type);46                 }47             }48         } catch (Exception e) {49             // TODO Auto-generated catch block50             e.printStackTrace();51         }52     }53 }