SSM项目使用AOP技术进行日志记录

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本步骤只记录完成切面所需的必要代码

本人开发中遇到的问题：

切面一直切不进去，最后发现需要在springMVC的核心配置文件中中开启注解驱动才可以，只在spring的核心配置文件中开启是不会在web项目中生效的。

之后按照下面的代码进行配置，然后前端在访问controller层中的路径时即可观察到日志已经被正常记录到数据库，代码中有部分注释，看不懂的可以参照注释。接下来进入正题

1、导入maven坐标

 <!--切面--><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>5.0.2.RELEASE</version></dependency><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.7</version></dependency><!-- AspectJ Runtime --><dependency><groupId>org.aspectj</groupId><artifactId>aspectjrt</artifactId><version>1.8.7</version> </dependency>

2、核心文件配置，在springMVC.xml文件中开启AOP切面注解驱动

<?xml version="1.0" encoding="UTF-8"?>
<beansxmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd
"><!--    开启注解驱动--><context:annotation-config/><!--    开启组件扫描--><context:component-scan base-package="com.xszx"></context:component-scan><!--    开启切面注解驱动--><aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>

3、配置web.xml文件，指定spring容器的配置文件

<!DOCTYPE web-app PUBLIC"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN""http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app><display-name>Archetype Created Web Application</display-name><!--配置一个全局的参数：指定spring容器的配置文件 ServletContext--><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:beans.xml</param-value></context-param><!--解决中文乱码的filter一定要放在最前面  --><filter><filter-name>CharacterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><!-- 配置encoding，告诉我们指定的编码格式 --><init-param><param-name>encoding</param-name><param-value>utf-8</param-value></init-param><init-param><!--是否强制设置request的编码为encoding，默认false，不建议更改--><param-name>forceRequestEncoding</param-name><param-value>false</param-value></init-param><init-param><!--是否强制设置response的编码为encoding，建议设置为true，下面有关于这个参数的解释--><param-name>forceResponseEncoding</param-name><param-value>false</param-value></init-param></filter><filter-mapping><filter-name>CharacterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!--配置监听器：创建spring容器对象--><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!--定义一个request监听器--><listener><listener-class>org.springframework.web.context.request.RequestContextListener</listener-class></listener><servlet><servlet-name>SpringMVC</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!--指定配置文件的路径--><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:SpringMVC.xml</param-value></init-param></servlet><servlet-mapping><servlet-name>SpringMVC</servlet-name><url-pattern>/</url-pattern></servlet-mapping>
</web-app>

4、切面类

@Component
@Aspect
public class LogAop {@Resourceprivate LoginUserCountService loginUserCountService;@Autowiredprivate HttpServletRequest request;@Autowiredprivate ISysLogService sysLogService;private Date visitTime; //开始时间private Class clazz; //访问的类private Method method;//访问的方法//前置通知  主要是获取开始时间，执行的类是哪一个，执行的是哪一个方法@Before("execution(public * com.xszx.controller.*.*(..))")public void doBefore(JoinPoint jp) {try {visitTime = new Date(); // 当前时间就是开始访问的时间clazz = jp.getTarget().getClass(); // 具体要访问的类String methodName = jp.getSignature().getName(); // 获取访问的方法的名称Object[] args = jp.getArgs(); // 获取访问的方法的参数// 获取具体执行的方法的Method对象if (args == null || args.length == 0) {method = clazz.getMethod(methodName); // 只能获取无参数的方法} else {Class[] classArgs = new Class[args.length];for (int i = 0; i < args.length; i++) {classArgs[i] = args[i].getClass();}method = clazz.getMethod(methodName, classArgs);}} catch (NoSuchMethodException e) {//            e.printStackTrace();} catch (Exception e) {//            e.printStackTrace();}}//后置通知@After("execution(* com.xszx.controller.*.*(..))")public void doAfter(JoinPoint jp) {try {long time = new Date().getTime() - visitTime.getTime(); // 获取访问的时长String url = "";// 获取urlif (clazz != null && method != null && clazz != LogAop.class) {RequestMapping methodAnnotation = method.getAnnotation(RequestMapping.class);if (methodAnnotation != null) {String[] methodValue = methodAnnotation.value();url = methodValue[0];// 获取访问的ipString ip = request.getRemoteAddr();// 登录时将用户信息存入session，现在从session中获取当前操作的用户HttpSession httpSession = request.getSession();User user = (User)httpSession.getAttribute("loginUser");String userEmail = "";if (user == null){userEmail = "无登录用户";}else {userEmail = user.getEmail();}// 将日志相关信息封装到SysLog对象SysLog sysLog = new SysLog();sysLog.setExecutionTime(time); // 执行时长sysLog.setIp(ip);sysLog.setMethod("[类名] " + clazz.getName() + "[方法名] " + method.getName());sysLog.setUrl(url);sysLog.setUsername(userEmail);sysLog.setVisitTime(visitTime);// 调用Service完成操作sysLogService.save(sysLog);}}} catch (Exception e) {//            e.printStackTrace();}}
}

5、beans层

public class SysLog {private Integer id;private Date visitTime;private String visitTimeStr;private String username;private String ip;private String url;private Long executionTime;private String method;//记得写getter，setter方法，构造方法，toString方法
}

6、dao层

public interface ISysLogMapper {void save(SysLog sysLog) throws Exception;List<SysLog> findAll() throws Exception;
}

7、service层

@Service
public class SysLogServiceImpl implements ISysLogService {private SqlSessionTemplate sqlSessionTemplate;@Autowiredpublic void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {this.sqlSessionTemplate = sqlSessionTemplate;}@Overridepublic List<SysLog> findAll() throws Exception {ISysLogMapper iSysLogMapper = sqlSessionTemplate.getMapper(ISysLogMapper.class);return iSysLogMapper.findAll();}@Overridepublic void save(SysLog sysLog) throws Exception {ISysLogMapper iSysLogMapper = sqlSessionTemplate.getMapper(ISysLogMapper.class);iSysLogMapper.save(sysLog);}
}

8、mapper层

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.xszx.dao.ISysLogMapper"><insert id="save">insert into syslog(visitTime,username,ip,url,executionTime,method)values(#{visitTime},#{username},#{ip},#{url},#{executionTime},#{method})</insert><select id="findAll" resultType="com.xszx.beans.SysLog">select * from sysLog</select>
</mapper>

9、数据库表结构

执行完后进行测试即可，当前扫描的路径是controller下的所有方法，所以随便进入一个即可打印出对于的日志记录。  

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