code: @SuppressWarnings("unchecked")
      public void addFieldMsg(String key, String value) {
          if (key == null) {
              return;
          }
          Map<String, String> fieldMsgs = null;
          // 字段错误信息
          if (!this.statusInfo.containsKey(WebResponseConstant.MESSAGE_FIELD)) {
              fieldMsgs = new HashMap<String, String>();
              this.statusInfo.put(WebResponseConstant.MESSAGE_FIELD, fieldMsgs);
          }
          fieldMsgs = (Map<String, String>) (this.statusInfo.get(WebResponseConstant.MESSAGE_FIELD));
          fieldMsgs.put(key, value);
      }
docs: 添加字段错误信息
  
  @param key
  键
  @param value
  值