Java slfj4日志记录-MDC.put函数不打印任何内容

我正在尝试使用slfj4 MDC类打印登录的用户名及其在日志中的id。这是我的密码，请告诉我哪里错了

JAVA文件-

@RequestMapping(value = "/get/{id}", method = RequestMethod.GET, produces = "application/json")
@ResponseBody
public classResponse getuser(@PathVariable("user_id") Integer user_id, @RequestParam(value = "department_id", required = false) Integer department_id) {
    JSONObject response = null;
    String username = getUserName();
    logger.debug("Testing MDC.");
    MDC.put("FirstName", "First");
    MDC.put("LastName", "Last");
    logger.info(":::ServiceContoller.getuser starts for userid" + user_id);
    logger.info(":::ServiceContoller.getCreateEnvironment:Ends for username" + username);
    try {
        response = classServiceImpl.getUser1(username, user_id, department_id);
        logger.info("Sending Environment details - {}", response);
    } catch (Exception e) {
        logger.error(e.getMessage(), e);
        return new ClassResponse(Constants.STR_ERROR, "Error getting USERDetails");
    }
    return new ClassResponse(Constants.STR_SUCCESS, response);
}

<?xml version="1.0" encoding="UTF-8" ?>
<configuration>
  <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
    <layout>
      <Pattern>%-4r [%thread] %-5level C:%X{FirstName} N:%X{LastName} - %m%n</Pattern>
    </layout>       
  </appender>

  <root> 
  <level value="info" />
    <appender-ref ref="CONSOLE"/>
  </root>  
</configuration>

XML属性文件-logback.XML-

@RequestMapping(value = "/get/{id}", method = RequestMethod.GET, produces = "application/json")
@ResponseBody
public classResponse getuser(@PathVariable("user_id") Integer user_id, @RequestParam(value = "department_id", required = false) Integer department_id) {
    JSONObject response = null;
    String username = getUserName();
    logger.debug("Testing MDC.");
    MDC.put("FirstName", "First");
    MDC.put("LastName", "Last");
    logger.info(":::ServiceContoller.getuser starts for userid" + user_id);
    logger.info(":::ServiceContoller.getCreateEnvironment:Ends for username" + username);
    try {
        response = classServiceImpl.getUser1(username, user_id, department_id);
        logger.info("Sending Environment details - {}", response);
    } catch (Exception e) {
        logger.error(e.getMessage(), e);
        return new ClassResponse(Constants.STR_ERROR, "Error getting USERDetails");
    }
    return new ClassResponse(Constants.STR_SUCCESS, response);
}

<?xml version="1.0" encoding="UTF-8" ?>
<configuration>
  <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
    <layout>
      <Pattern>%-4r [%thread] %-5level C:%X{FirstName} N:%X{LastName} - %m%n</Pattern>
    </layout>       
  </appender>

  <root> 
  <level value="info" />
    <appender-ref ref="CONSOLE"/>
  </root>  
</configuration>

%-4r[%thread]-5C级：%X{FirstName}N:%X{LastName}-%m%N

请告诉我我还需要什么或者我错在哪里。谢谢你的帮助。提前谢谢你。

你能试试这个吗

%-4相对[%thread]-5级别%logger{35}-%msg%n

谢谢。我也试过这个。但是没有起作用。发现一个非常好的项目：它解决了我的问题。你能找出问题所在吗？