基于Spring的AOP实现自定义annotation操作日志

引入项目需要的AOP包

 <!--aop-->    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-aop</artifactId>      <version>4.1.7.RELEASE</version>    </dependency>    <dependency>      <groupId>aspectj</groupId>      <artifactId>aspectjrt</artifactId>      <version>1.5.3</version>    </dependency>    <dependency>      <groupId>org.aspectj</groupId>      <artifactId>aspectjweaver</artifactId>      <version>1.8.6</version>    </dependency>    <dependency>      <groupId>aopalliance</groupId>      <artifactId>aopalliance</artifactId>      <version>1.0</version>    </dependency>    <dependency>      <groupId>cglib</groupId>      <artifactId>cglib</artifactId>      <version>3.2.4</version>    </dependency>

要在springmvc的配置文件里加入配置文件，并指明切点类的的包，好被自动扫描

          <aop:aspectj-autoproxy/>            <context:component-scan base-package="com..util"/>            <aop:aspectj-autoproxy proxy-target-class="true" />

首先编写一个annotation的注解类

import java.lang.annotation.*;@Target({ElementType.PARAMETER, ElementType.METHOD})@Retention(RetentionPolicy.RUNTIME)@Documentedpublic  @interface SystemControllerLog {    String description()  default "";}

其次在编写用户管理的切点类，记录用户操作的的时间，ip，操作

import org.aspectj.lang.JoinPoint;import org.aspectj.lang.annotation.*;import org.springframework.stereotype.Component;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import java.lang.reflect.Method;import java.util.Date;@Aspect@Componentpublic class SystemLogAspect {    @Resource    private EwslogDao ewslogDao;    //Controller层切点，也就是上面那个注解的路径    @Pointcut("@annotation(com.util.SystemControllerLog)")    public  void controllerAspect() {    }    /**     * 前置通知 用于拦截Controller层记录用户的操作     *     * @param joinPoint 切点     */    @Before("controllerAspect()")    public  void doBefore(JoinPoint joinPoint) {        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();        HttpSession session = request.getSession();        //读取session中的用户        User user = (User) session.getAttribute("user");        String name ="";        if(user!=null){            name = user.getUsername();        }else            name = "匿名用户";        //请求的IP        String ip = request.getRemoteAddr();        String description="";        try {            description = getControllerMethodDescription(joinPoint);        } catch (Exception e) {            e.printStackTrace();        }        Ewslog ewslog = new Ewslog();        ewslog.setLoginName(name);        ewslog.setLogDate(new Date());        ewslog.setDescription(description);        ewslog.setIpAddr(ip);        System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>ip"+name);        System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>ip"+description);        System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>ip"+ip);        ewslogDao.save(ewslog);    }    public  static String getControllerMethodDescription(JoinPoint joinPoint)  throws Exception {        String targetName = joinPoint.getTarget().getClass().getName();        String methodName = joinPoint.getSignature().getName();        Object[] arguments = joinPoint.getArgs();        Class targetClass = Class.forName(targetName);        Method[] methods = targetClass.getMethods();        String description = "";        for (Method method : methods) {            if (method.getName().equals(methodName)) {                Class[] clazzs = method.getParameterTypes();                if (clazzs.length == arguments.length) {                    description = method.getAnnotation(SystemControllerLog. class).description();                    break;                }            }        }        return description;    }}

在需要记录的切面类上只需要添加一个注解就可以完成aop了。spring真是太强大了。

  @RequestMapping("/loginOut")    @SystemControllerLog(description = "用户登出")    public String index(HttpServletRequest request){        HttpSession session = request.getSession();        session.setAttribute("user", null);       return "../index";    }