静态代理简介说明

静态代理

静态代理:
    在程序运行之前，提前在代码编写中，
	 为类编写代理类，我们将这种代理类的方式称之为“静态代理”
 

定义一个接口Target

package com.java265.proxy;
public interface Target {
   public String execute();
}

TargetImpl 实现接口Target
package com.java265.proxy;
public class TargetImpl implements Target {
   @Override
   public String execute() {
       System.out.println("TargetImpl execute！");
       return "execute";
  }
}

代理类
package com.java265.proxy;
public class Proxy implements Target{
   private Target target;
   public Proxy(Target target) {
       this.target = target;
  }

   @Override
   public String execute() {
       System.out.println("perProcess");
       String result = this.target.execute();
       System.out.println("postProcess");
       return result;
  }
}


测试类:
package com.java265.proxy;
public class ProxyTest {
   public static void main(String[] args) {
       Target target = new TargetImpl();
       Proxy p = new Proxy(target);
       String result =  p.execute();
       System.out.println(result);
  }
}

----运行以上代码,将输出以下信息----
perProcess
TargetImpl execute！
postProcess
execute