ajax的坑

    @RequestMapping("/ppp")
    public InetAddress fingIp() throws Exception {

        return NetworkUtil.getLocalHostLANAddress();
    }

                   $.ajax({
                       url: "/fras/linip",//请求地址
                       type: "post",//请求方式
                       async: false,//是否异步请求
                       dataType: "text",              ///这里只能是text,而非json
                       success: function (jdata1) {
                           alert(jdata1);
                           console.log(jdata1);
                           $("#ip").val(jdata1);

                       }
                   });