aop的使用

1 spring-web.xml配置文件

 <!-- 激活组件扫描功能,扫描aop的相关组件组件 -->    <context:component-scan base-package="com.datebook.aop"/>    <!-- 启动对@AspectJ注解的支持 -->    <aop:aspectj-autoproxy proxy-target-class="true" />    <!--简化配置:        1、自动注册DefaultAnnotationHandlerMapping,AnnotationMethodHandlerAdapter        2、提供一系列:数据绑定,数字和日期的format,@NumberFormat,@DataTimeFormat,xml,json默认读写支持    -->    <mvc:annotation-driven/>

2 自己看代码

package com.datebook.aop;import org.apache.log4j.Logger;import org.aspectj.lang.JoinPoint;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;import org.springframework.core.annotation.Order;import org.springframework.stereotype.Component;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes;import java.util.Arrays;import javax.servlet.http.HttpServletRequest;/** * Created by wangH on 2017/10/20. */@Aspect@Componentpublic class WebLogAspect {    private Logger logger = Logger.getLogger(getClass());    ThreadLocal<Long> startTime = new ThreadLocal<>();    /**      * 定义拦截规则：拦截com.xjj.web.controller包下面的所有类中，有@RequestMapping注解的方法。      *@Pointcut("execution(* com.wangH.web.controller..*(..)) and @annotation(org.springframework.web.bind.annotation.RequestMapping)")       *  表示匹配com.test.dbook.web中所有的公有方法  过滤 AccountController的所有方法     *@Pointcut("execution(public * com.wangH.web.*.*(..))&& !execution( * com.wangH.web.AccountController.*(..))")    */    @Pointcut("execution( * com.test.wangH.web..*.*(..))")    public void webLog() {}    @Before("webLog()")    public void doBefore(JoinPoint joinPoint) {        try {            startTime.set(System.currentTimeMillis());            // 接收到请求，记录请求内容            ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();            HttpServletRequest request = attributes.getRequest();            // 记录下请求内容            logger.info("URL : " + request.getRequestURL().toString());            logger.info("HTTP_METHOD : " + getIpAddr(request));            logger.info("IP : " + request.getRemoteAddr());            logger.info("CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());            logger.info("ARGS : " + Arrays.toString(joinPoint.getArgs()));        } catch (Exception e) {            logger.error("***操作请求日志记录失败doBefore()***", e);        }    }    @AfterReturning(returning = "ret", pointcut = "webLog()")    public void doAfterReturning(Object ret) {        try {            // 处理完请求，返回内容            logger.info("RESPONSE : " + ret.toString());            logger.info("SPEND TIME : " + (System.currentTimeMillis() - startTime.get()));        } catch (Exception e) {            logger.error("***操作请求日志记录失败doAfterReturning()***", e);        }    }    /**     * 获取登录用户远程主机ip地址     *     * @param request     * @return     */    private String getIpAddr(HttpServletRequest request) {        String ip = request.getHeader("x-forwarded-for");        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {            ip = request.getHeader("Proxy-Client-IP");        }        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {            ip = request.getHeader("WL-Proxy-Client-IP");        }        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {            ip = request.getRemoteAddr();        }        return ip;    }}