SpringBoot實戰項目（十七）--使用攔截器實現系統日志功能

系統日志一般用來記錄用戶登錄系統后的一些操作記錄

誰（當前登錄用戶）--- 什么時間---- 做了哪些操作

 

新建sys_log(日志記錄表)

CREATE TABLE `sys_log` (
  `logId` int(11) NOT NULL AUTO_INCREMENT,
  `userName` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `msg` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `createTime` timestamp NOT NULL ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`logId`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8;

實體類

@Data
@ToString
public class SysLog implements Serializable {

    private Long logId;
    private String userName;
    private String msg;
    private String createTime;

利用自定義攔截器---MyInterceptor實現業務邏輯及數據保存操作

package com.beilin.interceptor;



import com.beilin.dao.LogDao;
import com.beilin.entity.SysLog;
import com.beilin.entity.SysUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;

/**
 *  攔截器
 */
public class MyInterceptor implements HandlerInterceptor {

    @Autowired
    private LogDao logDao;

 

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //獲取當前用戶
        SysUser user = (SysUser)request.getSession().getAttribute("user");
        Object msg = request.getSession().getAttribute("msg");
        //傳操作的JAVABEAN過來
        if (user != null && msg != null) {
            //寫入日志
            SysLog log = new SysLog();
            log.setUserName(user.getUserName());
            log.setMsg(msg.toString());
            logDao.save(log);
            //刪除msg
            request.getSession().removeAttribute("msg");
        }
    }

}

（注意：攔截器原本需要重寫三個方法的，這里為了方便直觀，只保留所需的，完整的最后附上）

這里都有相關文字說明，不再一一贅述，只要了解了設計思想其實很容易

用戶做新增，修改，刪除操作的時候才需要做記錄，查看之類的就沒必要

 @PostMapping("/add")
    @ResponseBody
  　　//新增用戶
    public Results<SysUser> save(SysUser sysUser, Integer roleId, HttpServletRequest request) {
       List<SysUser> results = userService.getUser(sysUser.getUserName(),sysUser.getTelephone(),sysUser.getEmail());
       if (results != null && results.size()>0){
           for (SysUser user : results){
               //判斷用戶名是否已存在
                if (user.getUserName().equals(sysUser.getUserName())){
                        return Results.failure(ResponseCode.USERNAME_REPEAT.getCode(), ResponseCode.USERNAME_REPEAT.getMessage());
                    }
                     //判斷手機號是否已存在
                    if (user.getTelephone().equals(sysUser.getTelephone())) {
                        return Results.failure(ResponseCode.PHONE_REPEAT.getCode(), ResponseCode.PHONE_REPEAT.getMessage());
                    }
                    //判斷郵箱是否已存在
                    if (user.getEmail().equals(sysUser.getEmail())) {
                        return Results.failure(ResponseCode.EMAIL_REPEAT.getCode(), ResponseCode.EMAIL_REPEAT.getMessage());
                    }
           }
       }
       sysUser.setStatus(1);
       //MD5加密
       sysUser.setPassWord(Md5Cipher.encryptWithSalt(sysUser.getPassWord()));
       request.getSession().setAttribute("msg","新增了用戶資料："+sysUser.toString());
            return userService.save(sysUser,roleId);
    }

如代碼所示，msg記錄用戶的操作內容，這里sysUser.toString()方法我只取幾個有意義的值，有興趣的可以自己重寫或者拼接

 

 

 這樣，sys_log表的字段都有值了，接下來把信息保存到數據庫即可

 

 

 

 這里比較簡單不需要寫service層了

項目最終效果----

 

 

 

package com.beilin.interceptor;



import com.beilin.dao.LogDao;
import com.beilin.entity.SysLog;
import com.beilin.entity.SysUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;

/**
 *  攔截器
 */
public class MyInterceptor implements HandlerInterceptor {

    @Autowired
    private LogDao logDao;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //獲取登錄時保存到session的用戶信息
        SysUser user = (SysUser) request.getSession().getAttribute("user");
        if (user == null) {
            //攔截未登錄請求
            request.getRequestDispatcher("/login").forward(request, response);
            return false;
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //獲取當前用戶
        SysUser user = (SysUser)request.getSession().getAttribute("user");
        Object msg = request.getSession().getAttribute("msg");
        //傳操作的JAVABEAN過來
        if (user != null && msg != null) {
            //寫入日志
            SysLog log = new SysLog();
            log.setUserName(user.getUserName());
            log.setMsg(msg.toString());
            logDao.save(log);
            //刪除msg
            request.getSession().removeAttribute("msg");
        }
    }

}