code: public static Map<String, String> filterBlank(Map<String, String> contentData){
  		LogUtil.writeLog("打印请求报文域 :");
  		Map<String, String> submitFromData = new HashMap<String, String>();
  		Set<String> keyset = contentData.keySet();
  		
  		for(String key:keyset){
  			String value = contentData.get(key);
  			if (StringUtils.isNotBlank(value)) {
  				// 对value值进行去除前后空处理
  				submitFromData.put(key, value.trim());
  				LogUtil.writeLog(key + "-->" + String.valueOf(value));
  			}
  		}
  		return submitFromData;
  	}
docs: 过滤请求报文中的空字符串或者空字符串
  @param contentData
  @return