代理模式和委托模式

1. 静态代理

public class DefaultProcess implements IProcess{
    @Override
    public void process() {
        System.out.println("DefaultProcess!");
    }
}

public class ProxyProcess implements IProcess{
    private IProcess process;
    public ProxyProcess(IProcess process){
        this.process = process;
    }
    @Override
    public void process() {
        process.process();
    }
}

2. 动态代理

public class Handler implements InvocationHandler{
    private Object target;//代理对象
    public Handler(Object target){this.target = target;}
    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        System.out.println("代理方法执行前");
        method.invoke(target,args);
        System.out.println("代理方法执行后");
        return proxy;
    }
}

public class HandlerTest { 
    private IProcess process;
    @Before
    public void before() throws Exception {
        process = new IProcess() {
                        @Override
                        public void process() {
                            System.out.println("DefaultProcess");
                        }
                    };
    }

    @After
    public void after() throws Exception {}

    /**
    *
    * Method: test(Process process)
    *
    */
    @Test
    public void testTest() throws Exception {
        //TODO: Test goes here...
    }
    /**
    *
    * Method: invoke(Object proxy, Method method, Object[] args)
    *
    */
    @Test
    public void testInvoke() throws Exception {
        Handler handler = new Handler(process);
        IProcess p = (IProcess) Proxy.newProxyInstance(process.getClass().getClassLoader(),process.getClass().getInterfaces(), handler);
        p.process();
    }
}