dynamicproxy.service.HelloService
class="java">package dynamicproxy.service; public interface HelloService { public void sayHello(); }
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dynamicproxy.service.impl.HelloServiceImpl
package dynamicproxy.service.impl; import dynamicproxy.service.HelloService; public class HelloServiceImpl implements HelloService { @Override public void sayHello() { System.out.println("hello everyone ... "); } }
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dynamicproxy.handler.LogHandler
package dynamicproxy.handler; import java.lang.reflect.InvocationHandler; import java.lang.reflect.Method; public class LogHandler implements InvocationHandler { private Object target = null; public LogHandler(Object target) { this.target = target; } private void doBefore(){ System.out.println("do before ... "); } private void doAfter(){ System.out.println("do after ... "); } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { doBefore(); Object res = method.invoke(target, args); doAfter(); return res; } }
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dynamicproxy.test.Main
package dynamicproxy.test; import java.lang.reflect.InvocationHandler; import java.lang.reflect.Proxy; import dynamicproxy.handler.LogHandler; import dynamicproxy.service.HelloService; import dynamicproxy.service.impl.HelloServiceImpl; public class Main { public static void main(String[] args) { HelloService target = new HelloServiceImpl(); InvocationHandler handler = new LogHandler(target); HelloService helloService = (HelloService) Proxy.newProxyInstance(target.getClass().getClassLoader(), target.getClass().getInterfaces(), handler); helloService.sayHello(); } }
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