反射获取方法

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people代码如下：

package com.wzd.tool;public class People {private String name;private String sex;private int age;public People(){System.out.println("构造方法被调用了啊！");}public People(String name){this.name=name;System.out.println("构造方法被调用了啊！+String");}public People(int age){this.age=age;System.out.println("构造方法被调用了啊！+int");}private People(String name,String sex){this.name=name;this.sex=sex;System.out.println("构造方法被调用了啊！+name  +sex");}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public void print(){System.out.println("this man is 36 years old");}public void print(String sex,int age){System.out.println("this"+ sex+" is "+age+" years old");}public static int[] print(String name,String sex,int age){System.out.println("this "+ sex+" called "+name+" is "+age+" years old");int[] list={1,2,3,4,5,6,7};return list;}private String[] getPersonalInfo(){System.out.println("the superman is 邓超");String[] info={"邓超","李晨","王祖蓝","王宝强","Baby","郑凯","陈赫"};return info;}}

<span style="white-space:pre"></span>放射获取方法如下：

</pre><pre name="code" class="java"><span style="white-space:pre"></span>public static void main(String[] args){System.out.println("这里是main方法()");}

/* * 反射执行people的print()方法 * */@Testpublic void test1() throws Exception{Class<People> clazz1=People.class;Method method=clazz1.getMethod("print", null);method.invoke(new People(), null);}/* * 反射执行people的print(String name,String sex)方法 * */@Testpublic void test2() throws Exception{Class<People> clazz1=People.class;Method method=clazz1.getMethod("print", String.class,int.class);method.invoke(new People(), "man",25);}/* * 反射执行people的print(String name,String sex,int age)方法(有返回值，静态方法) * */@Testpublic void test3() throws Exception{Class<People> clazz1=People.class;Method method=clazz1.getMethod("print", String.class,String.class,int.class);//调用静态方法可以不用有具体的对象int[] li=(int[])method.invoke(null,"王五","man",25);for(int i=0;i<li.length;i++){System.out.println(li[i]);}}/* * 反射执行people的print(String name,String sex,int age)方法（private方法） * */@Testpublic void test4() throws Exception{Class<People> clazz1=People.class;Method method=clazz1.getDeclaredMethod("getPersonalInfo", null);method.setAccessible(true);//调用静态方法可以不用有具体的对象String[] li=(String[])method.invoke(new People(),null);for(int i=0;i<li.length;i++){System.out.println(li[i]);}}

</pre><pre name="code" class="java"><span style="white-space:pre"></span>/** * 通过反射执行main方法 */@Testpublic void testMain() throws Exception{Class clazz1 = MethodGetDemo.class;Method method=clazz1.getMethod("main", String[].class);method.invoke(null, new String[]{"w","z"});}

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