Spring aop 日志实例

spring AOP实现的记录方法调用的日志功能的应用实例：目的是记录 系统登录功能 的执行情况，技术框架简单采用Spring+Struts。

1.登录页面：

<formaction="login.do"method="post">username:<inputtype="text"name="username"/><br>password:<inputtype="password"name="password"><br><inputtype="submit"value="login"></form>

2.表单类：

/**

*

• [描述信息：登陆表单类]

*

*/

publicclassLoginActionForm extends ActionForm {privateString username;privateString password;//setter,getter方法}

3.Action类：

/**

*

• [描述信息：登陆Action]

*

*/

publicclassLoginAction extends Action {privateILoginService loginService;@OverridepublicActionForward execute (ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {LoginActionForm laf = (LoginActionForm) form;Stringusername = laf.getUsername();Stringpassword = laf.getPassword();boolean ret = loginService.login(username, password);if(ret) {returnmapping.findForward("success");}returnmapping.findForward("fail");}//loginService的setter,getter方法}

4.service层接口：

publicinterfaceILoginService {publicboolean login(StringuserName, Stringpassword);}publicinterfaceILogService {publicvoidlog();publicvoidlogArg(JoinPoint point);publicvoidlogArgAndReturn(JoinPoint point, ObjectreturnObj);}

5.service层实现类：

/**

*

• [描述信息：登录Service类]

*

*/

publicclassLoginServiceImpl implements ILoginService {/**** <p>功能实现描述:登录处理逻辑(这里是假实现)</p>** @see com.bruceyang.login.service.ILoginService#login(java.lang.String, java.lang.String)*/publicbooleanlogin(String userName, String password) {StringBuffer sb=newStringBuffer();sb.append("Target:").append("login:").append(userName).append(",").append(password);System.out.println(sb.toString());returntrue;}}

/**** <p>[描述信息：操作日志记录Service]</p>*/publicclassLogServiceImpl implementsILogService {/**** <p>功能实现描述:最简单的情况</p>** @see com.bruceyang.login.service.ILogService#log()* @author: bruce.yang* @date: Created on 2013-8-13 下午1:46:17*/publicvoidlog() {System.out.println(newSimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(newDate())+" *******Log*********");}

/**** <p>功能实现描述:有参无返回值的方法</p>** @see com.bruceyang.login.service.ILogService#logArg(org.aspectj.lang.JoinPoint)*/publicvoidlogArg(JoinPoint point) {StringBuffer sb=newStringBuffer();//获取连接点所在的目标对象Object obj=point.getTarget();//获取连接点的方法签名对象String method=point.getSignature().getName();//获取连接点方法运行时的入参列表Object[] args = point.getArgs();sb.append(newSimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(newDate())).append(" ");sb.append(obj.toString().substring(0,obj.toString().indexOf('@')));sb.append(".").append(method).append(" ");sb.append("Args:[");if(args != null) {for(inti=0;i<args.length;i++){Object o=args[i];sb.append(o);if(i<args.length-1){sb.append(",");}}}sb.append("]");System.out.println(sb.toString());}

/**** <p>功能实现描述:有参并有返回值的方法</p>** @see com.bruceyang.login.service.ILogService#logArgAndReturn(org.aspectj.lang.JoinPoint, java.lang.Object)* @author: bruce.yang* @date: Created on 2013-8-13 下午1:43:17*/publicvoidlogArgAndReturn(JoinPoint point, Object returnObj) {StringBuffer sb=newStringBuffer();//获取连接点所在的目标对象Object obj=point.getTarget();//获取连接点的方法签名对象String method=point.getSignature().getName();//获取连接点方法运行时的入参列表Object[] args = point.getArgs();sb.append(newSimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(newDate())).append(" ");sb.append(obj.toString().substring(0,obj.toString().indexOf('@')));sb.append(".").append(method).append(" ");sb.append("Args:[");if(args != null) {for(inti=0;i<args.length;i++){Object o=args[i];sb.append(o);if(i<args.length-1){sb.append(",");}}}sb.append("]").append(" ");sb.append("Ret:[").append(returnObj).append("]");System.out.println(sb.toString());}}

6.web.xml：

<!-- spring config --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:config/spring/app*.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- struts config --><servlet><servlet-name>action</servlet-name><servlet-class>org.apache.struts.action.ActionServlet</servlet-class><init-param><param-name>config</param-name><param-value>/config/struts/struts-config.xml</param-value></init-param><init-param><param-name>debug</param-name><param-value>2</param-value></init-param><init-param><param-name>detail</param-name><param-value>2</param-value></init-param><load-on-startup>2</load-on-startup></servlet><servlet-mapping><servlet-name>action</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping>

7.spring配置信息：

applicationContext.xml：

<?xmlversion="1.0"encoding="UTF-8"?><beansxmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"><beanid="logService"class="com.bruceyang.login.service.impl.LogServiceImpl"></bean><beanid="loginService"class="com.bruceyang.login.service.impl.LoginServiceImpl"></bean><aop:config><!-- 切入点 --><aop:pointcutexpression="execution(* com.bruceyang.login.service.impl.Login*.*(..))"id="myPointcut"/><!-- 切面： 将哪个对象中的哪个方法，织入到哪个切入点 --><aop:aspectid="dd"ref="logService"><!-- 前置通知<aop:before method="log" pointcut-ref="myPointcut" /><aop:after method="logArg" pointcut-ref="myPointcut"/><aop:after-returning method="logArgAndReturn" returning="returnObj" pointcut-ref="myPointcut"/>--><aop:beforemethod="log"pointcut-ref="myPointcut"/><aop:aftermethod="logArg"pointcut-ref="myPointcut"/><aop:after-returningmethod="logArgAndReturn"returning="returnObj"pointcut-ref="myPointcut"/></aop:aspect></aop:config></beans>7.Struts配置信息：  struts-config.xml：<?xmlversion="1.0"encoding="UTF-8"?><!DOCTYPE struts-config PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN""http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd"><struts-config><form-beans><form-beanname="loginActionForm"type="com.bruceyang.login.web.form.LoginActionForm"/></form-beans><action-mappings><actionpath="/tologin"forward="/login.jsp"/><actionpath="/login"type="org.springframework.web.struts.DelegatingActionProxy"name="loginActionForm"scope="request"input="/login.jsp"><forwardname="success"path="/success.jsp"/><forwardname="fail"path="/login.jsp"/></action></action-mappings><plug-inclassName="org.springframework.web.struts.ContextLoaderPlugIn"><set-propertyproperty="contextConfigLocation"value="/WEB-INF/classes/config/struts/action-servlet.xml"/></plug-in></struts-config>action-servlet.xml：<?xmlversion="1.0"encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans><importresource="login-action.xml"/></beans>login-action.xml：<?xmlversion="1.0"encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans><beanname="/login"class="com.bruceyang.login.web.action.LoginAction"><propertyname="loginService"ref="loginService"/></bean></beans>