/**代理接口*/
public interface IHello {
String hi(String key);
}
/**代理接口实现类*/
public class HelloImpl implements IHello {
@Override
public String hi(String key) {
String str = "hello:" + key;
System.out.println("HelloImpl! " + str);
return str;
}
}
/**jdk动态代理类*/
public class JdkProxy implements InvocationHandler {
private Object target;
public JdkProxy(Object target) {
this.target = target;
}
/**
* 获取被代理接口实例对象
*
* @param <T>
* @return
*/
public <T> T getProxy() {
return (T) Proxy.newProxyInstance(target.getClass().getClassLoader(), target.getClass().getInterfaces(), this);
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
System.out.println(">>> JdkProxy start");
Object result = method.invoke(target, args);
System.out.println(">>> JdkProxy end");
return result;
}
}
/**测试*/
public class Demo2Test {
public static void main(String[] args) {
JdkProxy proxy = new JdkProxy(new HelloImpl());
IHello helloProxy = proxy.getProxy();
helloProxy.hi(" jdk proxy !");
}
}