Java動態代理簡單實現

Java動態代理簡單實現：

1. package com.dynamic.proxy;
3. public class ProxyDemo {
5. public static void main(String[] args) throws SecurityException, NoSuchMethodException {
7. LogHandler logHandler = new LogHandler();
9. IHello hello = (IHello)logHandler.bind(new HelloImp());
11. hello.toHello("cross");
12. hello.toHello1("cross");
14. }
15. }

1. package com.dynamic.proxy;
3. import java.lang.reflect.InvocationHandler;
4. import java.lang.reflect.Method;
5. import java.lang.reflect.Proxy;
7. public class LogHandler implements InvocationHandler {
9. private Object deledate;
11. public Object bind(Object deledate){
12. this.deledate = deledate;
13. Object proxy = Proxy.newProxyInstance(deledate.getClass().getClassLoader(), deledate.getClass().getInterfaces(), this);
14. return proxy;
15. }
17. public Object invoke(Object proxy, Method method, Object[] obj)
18. throws Throwable {
20. doBefore();
22. Object result = method.invoke(deledate, obj);
24. doAfter();
26. return result;
27. }
29. private void doBefore() {
30. System.out.println("before....");
31. }
34. private void doAfter() {
35. System.out.println("after....");
36. }
38. }

1. package com.dynamic.proxy;
3. public interface IHello {
4. public void toHello(String name);
5. public void toHello1(String name);
6. }

1. package com.dynamic.proxy;
3. public class HelloImp implements IHello {
5. public void toHello(String name) {
6. System.out.println("method hello:" + name);
7. }
8. public void toHello1(String name) {
9. System.out.println("method hello1:" + name);
10. }
12. }