使用AOP思想实现日志的添加

//1、创建日志表syslog-------》创建日志的实体类---------》在web.xml中配置监听

<listener>
     <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>

--------》书写LogAop组件，并封装到实体类中，保存到数据库

package com.hope.controller;

import com.hope.domain.SysLog;
import com.hope.service.ISysLogService;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.User;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.Date;

/**
 * @author newcityman
 * @date 2019/12/14 - 22:44
 */
@Component
@Aspect
public class LogAop {

    @Autowired
    private HttpServletRequest request;

    private Date visitTime;    //开始时间
    private Class clazz;       //访问的类
    private Method method;     //访问的方法
    private Long executionTime;  //访问时长

    @Autowired
    private ISysLogService sysLogService;

    //前置通知   主要获取开始时间，执行的是哪个类，哪个方法
    @Before("execution(* com.hope.controller.*.*(..))")
    public void doBefore(JoinPoint jp) throws Exception {
        visitTime = new Date();   //当前时间就是开始的时间
        clazz = jp.getTarget().getClass();   //具体访问的类
        String methodName = jp.getSignature().getName();  //获取的访问方法的名称
        Object[] args = jp.getArgs();

        //获取具体执行的方法的method对象
        if (args == null || args.length == 0) {
            method = clazz.getMethod(methodName);
        } 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);
        }


    }

    @After("execution(* com.hope.controller.*.*(..))")
    public void doAfter(JoinPoint jp) throws Exception {
        executionTime = new Date().getTime() - visitTime.getTime();  //获取访问时长
        String url = "";
        //获取url
        if (clazz != null && method != null && clazz != LogAop.class) {
            //获取类上的@RequestMapping("/***")
            RequestMapping clazzAnnotation = (RequestMapping) clazz.getAnnotation(RequestMapping.class);
            if (clazzAnnotation != null) {
                String[] clazzValue = clazzAnnotation.value();
                //获取方法上@RequestMapping("/***")
                RequestMapping methodAnnotation = method.getAnnotation(RequestMapping.class);
                if (methodAnnotation != null) {
                    String[] methodValue = methodAnnotation.value();
                    url = clazzValue[0] + methodValue[0];
                }
            }
        }
        //获取访问的ip地址
        String ip = request.getRemoteAddr();

        //获取系统的当前操作者
        SecurityContext context = SecurityContextHolder.getContext();
        User user = (User) context.getAuthentication().getPrincipal();
        String username = user.getUsername();

        //将日志相关信息封装到SysLog对象
        SysLog sysLog = new SysLog();
        sysLog.setVisitTime(visitTime);
        sysLog.setUsername(username);
        sysLog.setIp(ip);
        sysLog.setUrl(url);
        sysLog.setExecutionTime(executionTime);
        sysLog.setMethod("[类名] " + clazz.getName() + " [方法名] " + method.getName());

        //调用SysLogSservice的方法
        sysLogService.save(sysLog);

    }

}