spring aop综合.docxVIP

Spring AOP代理主要分为JDKProxy代理和Cglib代理。?1. jdk要代理的类要有其对就的接口类，而Cblib代理的类则不需要。?2. jdk代理类生成类要实现InvocationHandler(java.lang.reflect.InvocationHandler)接口，而Cglib代理类生成类要实现MethodInterceptor(net.sf.cglib.proxy.MethodInterceptor).?3. 实现类代码：?jdkProxy:?? this.targetObject = targetObject;?return Proxy.newProxyInstance(this.targetObject.getClass().getClassLoader(), this.targetObject.getClass().getInterfaces(), this);?cglibProxy:?this.targetObject = targetObject;?Enhancer enhancer = new Enhancer();?enhancer.setSuperclass(this.targetObject.getClass());?enhancer.setCallback(this);?return enhancer.create();?全部代码：?package com.aop.service;?public interface UserService {?public void save(String name);?}?package com.aop.service.impl;?import com.aop.service.UserService;?public class UserServiceBen implements UserService {?private String role = null;?public String getRole() {?return role;?}?public UserServiceBen(String role) {?this.role = role;?}?@Override?public void save(String name) {?System.out.println(正在保存用户的姓名：+name);?}?}?package com.aop.proxy;?import java.lang.reflect.InvocationHandler;?import java.lang.reflect.Method;?import java.lang.reflect.Proxy;?import com.aop.service.impl.UserServiceBen;?public class JDKProxy implements InvocationHandler {?public Object targetObject;?public Object createProxyInstance(Object targetObject){?this.targetObject = targetObject;?return Proxy.newProxyInstance(this.targetObject.getClass().getClassLoader(), this.targetObject.getClass().getInterfaces(), this);?}?@Override?public Object invoke(Object proxy, Method method, Object[] args)?throws Throwable {//环绕通知?Object result = null;?UserServiceBen bean = (UserServiceBen)targetObject;?if(bean.getRole() != null){?// ... before advice-- 前置通知?try {?result = method.invoke(targetObject, args);?////after advice-- 后置通知?} catch (Exception e) {?//exception advice-- 例外通知?e.printStackTrace();?}finally{?//finalAdvice-- 最终通知?}?}?return result;?}?}?package com.aop.service.impl;?public class UserServiceCGLIBBen{?private Stri