public class TestJdkProxy {
public static void main(String[] args) {
UserService userService = new UserServiceImpl();
JdkProxy jdkProxy = new JdkProxy(userService);
UserService proxyUserService = (UserService)Proxy.newProxyInstance(userService.getClass().getClassLoader(),
userService.getClass().getInterfaces(), jdkProxy);
proxyUserService.save();
}
}
class JdkProxy implements InvocationHandler {
private Object tagetObject;
public JdkProxy(Object tagetObject){
this.tagetObject = tagetObject;
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
System.out.println("开始拦截");
Object result = method.invoke(tagetObject, args);
System.out.println("结束");
return result;
}
}
interface UserService{
void save();
}
class UserServiceImpl implements UserService{
@Override
public void save() {
System.out.println("save method");
}
}
