之前用spring aop和cglib,现在换了一个简单的例子。发现执行方法sayHello1()和sayHello2()都输出“before”和“after” 天啊,好难,懂我在说什么吗关于?我现在快疯了。TT
public interface HelloWorld {
void sayHello1(String say);
void sayHello2(String say);
}
public static class HelloWorldImpl implements HelloWorld {
@Override
public void sayHello1(String say) { System.out.println(say); }
@Override
public void sayHello2(String say) { System.out.println(say); }
}
public static class Invocation implements InvocationHandler {
private final Object target;
public Invocation(Object target) { this.target = target; }
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
System.out.println("before..."); // TODO method before
Object object = method.invoke(target, args);
System.out.println("after..."); // TODO method after
return object;
}
}
public static void main(String[] args) {
HelloWorld helloWorld = (HelloWorld) Proxy.newProxyInstance(
ClassLoader.getSystemClassLoader(),
new Class[] { HelloWorld.class },
new Invocation(new HelloWorldImpl())
);
helloWorld.sayHello1("Hello World1 ...");
helloWorld.sayHello2("Hello World2 ...");
}