jquery-validate remote验证，返回不同的消息内容

转自https://www.cnblogs.com/xiawuyi/

业务场景是mac地址既要验证唯一性又要验证格式是否正确，但源码中controller中仅仅是返回true或者false，无法满足业务需求，必须修改validate.js源码。

controller中代码改为：

    @ResponseBody
    @RequiresPermissions("sys:user:edit")
    @RequestMapping(value = "checkMac")
    public String checkMac(String oldMacAddress, String macAddress,HttpServletResponse response) {
        Map<String, Object> map = new HashMap<String, Object>();
        if (macAddress != null &&(macAddress.equals(oldMacAddress)||systemService.getUserByMacAddress(macAddress) == null)) {
            String reg_mac= "^[A-F0-9]{2}(-[A-F0-9]{2}){5}$"; 
            if((!Pattern.compile(reg_mac).matcher(macAddress).find())){ 
                map.put("success", false);
                map.put("message", "MAC地址格式不正确");
            }else{
                map.put("success", true);
            }
        } else {
            map.put("success", false);
            map.put("message", "MAC地址已存在");
        }
        return renderString(response,map);

    }

注意返回数据格变量和js中要获取的变量必须一致，而且必须为json格式

validate.js：修改remote中的success方法，success: function(response) 这里的 response是remote请求checkMac方法返回的json数据，

现在checkMac方法返回类型已经修改，所以该回调函数中的代码也要做相应的修改：

success回调函数中，将这两行代码：

      validator.settings.messages[element.name].remote = previous.originalMessage;
      var valid = response === true;
修改为
     var tempResponse = response;
     if (tempResponse.success != undefined) {
             response = tempResponse.success;
        }
     if (tempResponse.message != undefined) {
            validator.settings.messages[element.name].remote = tempResponse.message;
     } else {
            validator.settings.messages[element.name].remote = previous.originalMessage;
     }
     var valid = response === true;  

好了，问题解决了