SSM——（7）添加SpringMVC拦截器记录操作日志

目录

一、资料参考

二、数据库环境

1、创建表url_log

2、MBG创建通用代码

3、logService

三、拦截器

1、编写拦截器

2、配置拦截器

---

一、资料参考

https://blog.csdn.net/shaohe18362202126/article/details/84310488

二、数据库环境

*如果不考虑日志存储在数据库中，可以略过此步骤。

1、创建表url_log

DROP TABLE IF EXISTS `url_log`;
CREATE TABLE `url_log` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `creat_time` datetime DEFAULT NULL,
  `op_name` varchar(255) DEFAULT NULL,
  `op_id` int(11) DEFAULT NULL,
  `request_url` varchar(255) DEFAULT NULL,
  `request_method` varchar(255) DEFAULT NULL,
  `request_params` varchar(255) DEFAULT NULL,
  `response_status` varchar(255) DEFAULT NULL,
  `controller_name` varchar(255) DEFAULT NULL,
  `controller_method` varchar(255) DEFAULT NULL,
  `cost_time` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=27 DEFAULT CHARSET=utf8;

2、MBG创建通用代码

UrlLogMapper.java

UrlLog.java

UrlLogMapper.xml

3、logService

/**
 * @name: UrlLogService
 * @description: log日志记录服务
 * @author: StarFall
 * @data: 2019年2月23日下午10:45:08
 */
@Service
public class UrlLogService {

	@Autowired
	private UrlLogMapper urlLogMapper;

	/**
	 * 记录log
	 * 
	 * @param log
	 */
	@Transactional
	public void addLog(UrlLog log) {
		urlLogMapper.insertSelectiveGetId(log);
	}

	/**
	 * 更新log
	 * 
	 * @param log
	 */
	@Transactional
	public void updateLog(UrlLog log) {
		urlLogMapper.updateByPrimaryKeySelective(log);
	}
}

在进行插入log的时候需要获取自增的主键，参考：https://blog.csdn.net/shaohe18362202126/article/details/84979873

三、拦截器

1、编写拦截器

/**
 * @name: LoggerInterceptor
 * @description: 日志拦截器记录操作日志
 * @author: StarFall
 * @data: 2019年2月23日下午9:46:41
 */
public class LoggerInterceptor implements HandlerInterceptor {

	@Autowired
	private UrlLogService urlLogService;
	// log4j
	private Logger logger = Logger.getLogger(LoggerInterceptor.class);
	// 本地线程存储消耗时间变量
	private static final ThreadLocal costTimeThreadLocal = new NamedThreadLocal<>("costTimeThreadLocal");
	// 本地线程存储log的id
	private static final ThreadLocal logIdThreadLocal = new NamedThreadLocal<>("logIdThreadLocal");

	/**
	 * 该方法在目标方法之前被调用.

	 * 若返回值为 true, 则继续调用后续的拦截器和目标方法. 

	 * 若返回值为 false, 则不会再调用后续的拦截器和目标方法.
	 */
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		long startTime = System.currentTimeMillis();
		costTimeThreadLocal.set(startTime);
		// logger日志记录
		logger.debug("********************LoggerInterceptor.begin********************");
		logger.debug(
				"OpTime:           " + new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.SSS").format(new Date(startTime)));
		logger.debug("RequestURL:       " + request.getRequestURL());
		logger.debug("RequestMethod:    " + request.getMethod());
		logger.debug("RequestParams:    " + getParamString(request.getParameterMap()));
		// 初始化UrlLog对象
		UrlLog log = new UrlLog();
		log.setCreatTime(new Date(startTime));
		log.setRequestUrl(request.getRequestURL().toString());
		log.setRequestMethod(request.getMethod());
		if (handler instanceof HandlerMethod) {
			HandlerMethod h = (HandlerMethod) handler;
			logger.debug("ControllerName:   " + h.getBean().getClass().getName());
			logger.debug("ControllerMethod: " + h.getMethod().getName());
			log.setControllerName(h.getBean().getClass().getName());
			log.setControllerMethod(h.getMethod().getName());
		}
		log.setRequestParams(getParamString(request.getParameterMap()));
		urlLogService.addLog(log);
		// 获取自动生成的主键
		Integer logId = log.getId();
		logIdThreadLocal.set(logId);
		return true;
	}

	/**
	 * 调用目标方法之后, 但在DispatcherServlet渲染视图之前被调用. 

	 * 可以处理对应的ModelAndView
	 */
	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {
		logger.debug("响应状态:          " + response.getStatus());
		logger.debug("最大内存:          " + Runtime.getRuntime().maxMemory() / 1024 / 1024 + "m");
		logger.debug("已分配内存:         " + Runtime.getRuntime().totalMemory() / 1024 / 1024 + "m");
		logger.debug("已分配内存中的剩余空间: " + Runtime.getRuntime().freeMemory() / 1024 / 1024 + "m");
		logger.debug("最大可用内存:        " + (Runtime.getRuntime().maxMemory() - Runtime.getRuntime().totalMemory()
				+ Runtime.getRuntime().freeMemory()) / 1024 / 1024 + "m");
		long endTime = System.currentTimeMillis();
		long startTime = costTimeThreadLocal.get();
		logger.debug("耗时:             " + (endTime - startTime) + "ms");
		// 更新log对象
		Integer logId = logIdThreadLocal.get();
		UrlLog log = new UrlLog();
		log.setId(logId);
		log.setResponseStatus(String.valueOf(response.getStatus()));
		log.setCostTime(String.valueOf((endTime - startTime) + "ms"));
		urlLogService.updateLog(log);
		logger.debug("********************LoggerInterceptor.end********************");
		// 清除本地线程
		logIdThreadLocal.remove();
		costTimeThreadLocal.remove();
	}

	/**
	 * 在DispatcherServlet渲染视图之后被调用. 主要作用是释放资源

	 */
	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
			throws Exception {

	}

	/**
	 * 从Map参数获取参数字符串
	 * 
	 * @param map
	 *            参数map
	 * @return
	 */
	private String getParamString(Map map) {
		StringBuilder sb = new StringBuilder();
		for (Entry e : map.entrySet()) {
			sb.append(e.getKey()).append("=");
			String[] value = e.getValue();
			if (value != null && value.length == 1) {
				sb.append(value[0]).append("&");
			} else {
				sb.append(Arrays.toString(value)).append("&");
			}
		}
		if (sb.length() >= 1) {
			if (sb.substring(sb.length() - 1, sb.length()).equals("&")) {
				sb.deleteCharAt(sb.length() - 1);
			}
		}
		return sb.toString();
	}
}

2、配置拦截器

在applicationContext-servlet.xml中配置拦截器

参考文章：https://blog.csdn.net/u011781521/article/details/78624276