后台以json数据形式返回之后前台接受的方法以及之后的解析总结

 @RequestMapping(value = "/queryDist", method = RequestMethod.POST)
    @ResponseBody
    public Result queryDist(HttpServletRequest request) {
        Boolean f = false;
        String devCode = request.getParameter("devCode");
        Subject subject = SecurityUtils.getSubject();
        String userId = (String) subject.getPrincipal();
        User user = userService.getUserById(userId);
        log.info("发送盘点指令，设备号是："+devCode+",盘点指定卡盘：为指定；");
        Map map=new HashMap();

        try {
           //。。。。。。逻辑代码省略。。。。。。。。。。。。。
                return new Result(true, ResultCodeEnum.SUCCESS.getRetCode(),ResultCodeEnum.SUCCESS.getRetMsg(),list);
            }
        } catch (Exception e) {
            log.info("加卡指令发送失败"+e.getMessage());
            e.printStackTrace();
            return new Result(false, ResultCodeEnum.CONNECT_ERROR.getRetCode(),ResultCodeEnum.CONNECT_ERROR.getRetMsg());
        }
        return new Result(f);
    }

public class Result {
    private boolean success;
    private String retCode ;
    private String retMsg;
    private Object data;
    private String message;
    private String code;
}

                        ajaxPost(basePath+"/api/deviceController/queryDist?devCode="+devCode,null,function(data){
                            if(data.retCode==‘00‘){
                                modals.correct("指令发送成功,数据盘点中，请稍后...");
                                console.log(data.data)
                                var nums=data.data;
                                console.log(nums.length)
                                for (var i=0;i<nums.length;i++){
                                    if (nums[i].indexOf("-")==0){//实际盘库有卡但是数据库记录无卡
                                        $("#showResult").append("<div class=\"eachMassage\" style=\"padding-left:10px;padding-left:10px;width: 90%;height: 25px;line-height: 25px;margin: 5px auto;background-color: rgba(0,0,255,0.3);text-align: left;border-radius: 3px;color: white;\">卡槽"+(0-nums[i])+"数据不匹配：数据库记录无卡，实际盘库结果有卡</div>\n")
                                    } else {
                                        $("#showResult").append("<div class=\"eachMassage\" style=\"padding-left:10px;padding-left:10px;width: 90%;height: 25px;line-height: 25px;margin: 5px auto;background-color:rgba(0,255,0,0.3);text-align: left;border-radius: 3px;color: white;\">卡槽"+nums[i]+"数据不匹配：数据库记录有卡，实际盘库结果无卡</div>\n")
                                    }
                                }
                            }else{
                                modals.error("指令发送失败，连接设备失败");
                            }
                        });

public List<Comments> findCommentsByMessageId(HttpServletRequest request, HttpServletResponse response,int msgId){
        List<Comments> list= service.findCommentsByMessageId(msgId);
        //将列表转成json字符串
        JSONArray json=JSONArray.fromObject(list);
        String jsonString=json.toString();
        //将json字符串返回给前台
        try {
            PrintWriter out =response.getWriter();
            out.write(jsonString);
            out.flush();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

@Override
    public String toString() {
        return "Comments [commentsId=" + commentsId + ", messageId="
                + messageId + ", messageUserId=" + messageUserId
                + ", commentsUserId=" + commentsUserId + ", commentwords="
                + commentwords + ", publishtime=" + publishtime
                + ", headimgname=" + headimgname + ", nickname=" + nickname
                + "]";
    }