获取方法通用参数类型

//package com.nowjava;


import java.lang.reflect.Method;/** 时 代 J a v a 公 众 号 提供 **/

import java.lang.reflect.ParameterizedType;

import java.lang.reflect.Type;


public class Main {

    public static Class<?> getMethodGenericParameterTypes(Method method,

            int paramIndex) {

        Class<?> literalType = method.getParameterTypes()[paramIndex];

        Type genericType = method.getGenericParameterTypes()[paramIndex];

        return chooseOneType(literalType, genericType);


    }


    static Class<?> chooseOneType(Class<?> literalType, Type genericType) {

        if (genericType instanceof ParameterizedType) {

            return digFromGenericType(genericType);

        }/* from 时代Java公众号 - nowjava.com*/

        return literalType;

    }


    static Class<?> digFromGenericType(Type genericType) {

        Type[] typeArguments = ((ParameterizedType) genericType)

                .getActualTypeArguments();

        Type type = typeArguments[0];

        if (