1、创建接口类

package com.lx.proxy;public interface StudentService {    void study();}

2、接口实现类，具体业务处理

package com.lx.proxy;public class StudentServiceImp implements StudentService {    @Override    public void study() {        System.out.println("day day up !");    }}

3、静态代理类

package com.lx.proxy;public class StudentProxy implements StudentService {    private StudentService student;    public StudentProxy(StudentService student){        this.student = student;    }    @Override    public void study() {        System.out.println("before study !");        student.study();        System.out.println("after study !");    }}

4、客户端

package com.lx.proxy;public class Client1 {    public static void main(String[] args){        StudentProxy studentProxy = new StudentProxy(new StudentServiceImp());        studentProxy.study();    }}