反射获取泛型

package com.sinosoft;

import com.sinosoft.lis.bq.PEdorAppBL;

import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Map;

//使用反射获取泛型信息
public class Test {

    public String test01(Map<String, PEdorAppBL> map,Double dou){
        return "yyy";

    }
    public Map<String, PEdorAppBL> test02(){
        return null;

    }

    public static void main(String[] args) throws NoSuchMethodException {
        System.out.println("方法1");
        Method method = Test.class.getMethod("test01", Map.class, Double.class);
        Type[] genericParameterTypes = method.getGenericParameterTypes();
        for (Type genericParameterType:genericParameterTypes) {
            System.out.println("=========="+genericParameterType);
            if(genericParameterType instanceof ParameterizedType){
                Type[] actualTypeArguments = ((ParameterizedType) genericParameterType).getActualTypeArguments();
                for(Type actualTypeArgument:actualTypeArguments){
                    System.out.println(actualTypeArgument);
                }

            }
        }
        System.out.println("方法2");
        Method method2 = Test.class.getMethod("test02", null);
        Type genericReturnType = method2.getGenericReturnType();
        if(genericReturnType instanceof ParameterizedType){
            Type[] actualTypeArguments = ((ParameterizedType) genericReturnType).getActualTypeArguments();
            for(Type actualTypeArgument:actualTypeArguments){
                System.out.println(actualTypeArgument);
            }

        }
    }
}



运行结果：

方法1
==========java.util.Map<java.lang.String, com.sinosoft.lis.bq.PEdorAppBL>
class java.lang.String
class com.sinosoft.lis.bq.PEdorAppBL
==========class java.lang.Double
方法2
class java.lang.String
class com.sinosoft.lis.bq.PEdorAppBL

具体代码解释，可以参考这个网址:https://blog.csdn.net/weixin_39452731/article/details/82916840