类图

源码
(1) Customer.java
package proxytest;
public class Customer implements Person{
public void findLove(){
System.out.println("高富帅");
System.out.println("身高180cm");
System.out.println("有6块腹肌");
System.out.println("未满18岁");
}
}
(2) JDKMeipo.java
package proxytest;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
public class JDKMeipo implements InvocationHandler{
// 被代理的对象,把引用保存下来
private Object target;
public Object getInstance(Object target) throws Exception{
this.target = target;
Class<?> clazz = target.getClass();
return Proxy.newProxyInstance(clazz.getClassLoader(),clazz.getInterfaces(),this);
}
public Object invoke( Object proxy, Method method, Object[] args ) throws Throwable{
before();
Object obj = method.invoke(this.target,args);
after();
return obj;
}
private void before(){
System.out.println("我是媒婆:我给你找对象,现在已经确认你的需求");
System.out.println("开始物色");
}
private void after(){
System.out.println("未满18岁,对不起不能早恋!!");
}
}
(3) Person.java
package proxytest;
public interface Person {
public void findLove();
}
(4) Test.java
package proxytest;
public class Test {
public static void main(String[] args){
try {
Person obj = (Person)new JDKMeipo().getInstance(new Customer());
obj.findLove();
} catch (Exception e) {
e.printStackTrace();
}
}
}
测试截图
