package com.yjf.esupplier.common.test;import java.lang.reflect.Constructor;import java.lang.reflect.Method;/** * @author shusheng * @description 通过反射获取成员方法并使用 * @Email shusheng@yiji.com * @date 2019/1/5 18:37 */public class ReflectDemo3 {    public static void main(String[] args) throws Exception {        // 获取字节码文件对象        Class c = Class.forName("com.yjf.esupplier.common.test.Person");        // 获取自己的包括父亲的公共方法        Method[] methods1 = c.getMethods();        for (Method method : methods1) {            System.out.println(method);        }        System.out.println("-------------------------------");        // 获取自己的所有的方法        Method[] methods2 = c.getDeclaredMethods();        for (Method method : methods2) {            System.out.println(method);        }        System.out.println("-------------------------------");        //通过无参构造方法拿到对象        Constructor con = c.getConstructor();        Object obj = con.newInstance();        //获取单个方法并使用        Method m1 = c.getMethod("show");        m1.invoke(obj);        System.out.println("-------------------------------");        //第一个参数表示对象是谁，第二参数表示调用该方法的实际参数        Method m2 = c.getMethod("method", String.class);        m2.invoke(obj, "Hello");        System.out.println("-------------------------------");        // 返回值是Object接收        Method m3 = c.getMethod("getString", String.class, int.class);        Object objString = m3.invoke(obj, "hello", 100);        String s = (String) m3.invoke(obj, "hello", 100);        System.out.println(objString);        System.out.println(s);        System.out.println("-------------------------------");        // private void function()        Method m4 = c.getDeclaredMethod("function");        m4.setAccessible(true);        m4.invoke(obj);    }}

package com.yjf.esupplier.common.test;/** * @author shusheng * @description * @Email shusheng@yiji.com * @date 2018/12/29 13:42 */public class Person {        private String name;        int age;        public String address;        public Person() {        }        private Person(String name) {            this.name = name;        }        Person(String name, int age) {            this.name = name;            this.age = age;        }        public Person(String name, int age, String address) {            this.name = name;            this.age = age;            this.address = address;        }        public void show() {            System.out.println("show方法的输出");        }        public void method(String s) {            System.out.println("method方法的输出： " + s);        }        public String getString(String s, int i) {            return s + "---" + i;        }        private void function() {            System.out.println("function方法的输出");        }        @Override        public String toString() {            return "Person [name=" + name + ", age=" + age + ", address="                    + address                    + "]";        }}