静态署理和动态代理

静态代理和动态代理
Business.class

package aop;public interface Business {public void print();}

BusinessImpl.class

package aop;import java.util.logging.Logger;public class BusinessImpl implements Business {private Logger logger = Logger.getLogger(this.getClass().getName());public void print() {//System.out.println("Doing...");logger.info("Doing .....");}}

静态代理
StaticProxy .java

package invocation;import java.util.logging.Logger;/** * @author  E-mail:congpeixue@126.com * @version 创建时间：2008-6-17 下午11:28:37 类说明 */public class StaticProxy {private Logger logger = Logger.getLogger(this.getClass().getName());public Business business;public StaticProxy(Business business) {this.business = business;}void print() {logger.info("Start");// 回调business.print();logger.info("End");}}

StaticProxyTest.java

package invocation;/** * @author  E-mail:congpeixue@126.com * @version 创建时间：2008-6-17 下午11:38:38 * 类说明 */public class StaticProxyTest {public static void main(String[] args) {Business business = new BusinessImpl();StaticProxy proxy = new StaticProxy(business);proxy.print();}}

动态代理



LogHandler.class

package aop;import java.lang.reflect.InvocationHandler;import java.lang.reflect.Method;import java.util.logging.Logger;public class LogHandler implements InvocationHandler {private Logger logger = Logger.getLogger(this.getClass().getName());private Object delegate;public LogHandler(Object delegate) {this.delegate = delegate;}public Object invoke(Object proxy, Method method, Object[] args)throws Throwable {Object object = null;try {logger.info("start" + method);object = method.invoke(delegate, args);logger.info("end" + method);} catch(Exception e) {logger.info("Exception");}return object;}}

Main.class

package aop;import java.lang.reflect.InvocationHandler;import java.lang.reflect.Proxy;public class Main {public static void main(String[] args) {Business business = new BusinessImpl(); InvocationHandler handler = new LogHandler(business); System.out.println(business.getClass().getInterfaces());Business proxy = (Business) Proxy.newProxyInstance( business.getClass().getClassLoader(),business.getClass().getInterfaces(), handler); proxy.print(); }}

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