java 设计模式 代理 静态和动态

package com.zkk;

/**
* 定义一个账户接口
*
* @author Administrator
*
*/
public interface Count {
// 查看账户方法
public void queryCount();

// 修改账户方法
public void updateCount();

}

package com.zkk;

/**
* 委托类(包含业务逻辑)
*
* @author Administrator
*
*/
public class CountImpl implements Count {

@Override
public void queryCount() {
System.out.println("查看账户方法...");
}

@Override
public void updateCount() {
System.out.println("修改账户方法...");
}

}

package com.zkk;

public class CountProxy implements Count {
private Count countImpl;

/**
* 覆盖默认构造器
*
* @param countImpl
*/
public CountProxy(CountImpl countImpl) {
this.countImpl = countImpl;
}

@Override
public void queryCount() {
System.out.println("事务处理之前");
// 调用委托类的方法;
countImpl.queryCount();
System.out.println("事务处理之后");
}

@Override
public void updateCount() {
System.out.println("事务处理之前");
// 调用委托类的方法;
countImpl.updateCount();
System.out.println("事务处理之后");

}

}

package com.zkk;

public class Test {
public static void main(String[] args) {
CountImpl countImpl = new CountImpl();
CountProxy countProxy = new CountProxy(countImpl);
countProxy.updateCount();
countProxy.queryCount();
}
}