【通过配置文件来反射运行类中的方法】

package com.yjf.esupplier.common.test;

import java.io.FileReader;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.Properties;

/**
 * @author shusheng
 * @description 通过配置文件来反射运行类中的方法
 * @Email shusheng@yiji.com
 * @date 2019/1/5 18:37
 */
public class ReflectDemo4 {

    public static void main(String[] args) throws Exception {
        // 反射前的做法
        Person p = new Person();
        p.show();
        // 反射后的做法
        Properties prop = new Properties();
        FileReader fr = new FileReader("test.txt");
        prop.load(fr);
        fr.close();
        // 获取数据
        String className = prop.getProperty("className");
        String methodName = prop.getProperty("methodName");
        //反射
        Class c = Class.forName(className);
        Constructor con = c.getConstructor();
        Object obj = con.newInstance();
        //调用方法
        Method m = c.getMethod(methodName);
        m.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
                    + "]";
        }

}