code: public static Map<String, String> getParamMap(ServletRequest request) {
  		Map<String, String> params = new HashMap<String, String>();
  		for (Map.Entry<String, String[]> entry : getParams(request).entrySet()) {
  			params.put(entry.getKey(), ArrayUtil.join(entry.getValue(), StrUtil.COMMA));
  		}
  		return params;
  	}
docs: 获得所有请求参数
  
  @param request 请求对象{@link ServletRequest}
  @return Map