通过反射去获取集合类中的泛型实际类型
package com.huaxia.utils.learn;import java.io.InputStream;import java.lang.reflect.Method;import java.lang.reflect.ParameterizedType;import java.lang.reflect.Type;import java.util.Date;import java.util.List;import java.util.Properties;import java.util.Vector;public class ClassLoaderTest {public static void main(String[] args) throws Exception {//// 从classpath根目录开始找配置文件//InputStream is = ClassLoaderTest.class.getClassLoader()//.getResourceAsStream("config.properties");//Properties prop = new Properties();//prop.load(is);//is.close();//System.out.println(prop.get("apple"));Method m = ClassLoaderTest.class.getMethod("applyVector", Vector.class,List.class);Type[] types = m.getGenericParameterTypes();for(Type t:types){System.out.println(((ParameterizedType) t).getRawType());System.out.println(((ParameterizedType) t).getActualTypeArguments()[0]);}}public static <T> void applyVector(Vector<Date> p,List<T> o){}}

?执行结果：

class java.util.Vector

class java.util.Date

interface java.util.List

T