java Proxy 解析---spring aop-蒲公英云

java Proxy 解析---spring aop

1.接口

public interface IAccountService { 
    int getInt(int i);
    int getInt2(int i);
}

2.实现

public class AccountServiceImpl implements IAccountService { 
    public int getInt(int i) { 
        return i;
    }
    public int getInt2(int i) { 
        return i;
    }
}

3.代理类

package com.jd.xq.proxy;
import com.jd.xq.service.IAccountService;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
/** * @author duanxiaoqiu * @Date 2020-01-07 16:21 **/
public class AccountAdvice implements InvocationHandler { 
    private IAccountService iAccountService;
    public AccountAdvice(IAccountService iAccountService) { 
        this.iAccountService = iAccountService;
    }
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { 
        if (method.getName().equals("getInt")) { 
            return 100;
        }
        return method.invoke(iAccountService, args);
    }
}

4.应用

public static void main(String[] args) { 
        //创建目标对象
        IAccountService target = new AccountServiceImpl();
        //创建代理对象
        IAccountService proxy = (IAccountService) Proxy.newProxyInstance(target.getClass().getClassLoader(),
                target.getClass().getInterfaces(),
                new AccountAdvice(target)
        );
        System.out.println(proxy.getInt(1));
        System.out.println(proxy.getInt2(1));
    }