来自spring控制器的ajax中的自定义错误消息

Question

我有一个控制器，它返回一些对象，在不好的情况下，它应该将错误消息传输到 ajax 中的错误部分。 responseText 不接受，因为 tomcat 返回给我一个带有标签和完整堆栈跟踪的整个页面，但我只需要几句话就可以向用户显示此消息。

    @RequestMapping(value = {"/charts"}, method = RequestMethod.POST)
    @ResponseBody
    public Chart handleSelectionFiled(@RequestBody Chart chart) {

        try{
            chart.doSmth();
        } catch (Exception e) {
            //some code to transmit exception message - this is my question    
        }
        return chart;
     }

ajax函数

$.ajax({
        contentType: 'application/json',
        mimeType: 'application/json',
        type: frm.attr('method'),
        url: frm.attr('action'),
        dataType: 'json',
        data: data["chosenFile"],
        success: function (response) {
            turnOffPreLoader($("#defects_info"),response);
            $('#selectionForm').submit();

        },
        error: function (jqXHR, textStatus, errorThrown) {
            $("#result").text(errorThrown);
            turnOffPreLoader($("#defects_info"),"default:50");
        }
    });

Answer 1

服务器端：

@RequestMapping(value = {"/charts"}, method = RequestMethod.POST)
@ResponseBody
public Chart handleSelectionFiled(@RequestBody Chart chart, HttpServletRequest request, HttpServletResponse response) {
    try{
       chart.doSmth();
    } catch (Exception e) {
       response.setStatus(400);
       response.getWriter().write(e.getMessage());
    }
    return chart;
}

客户端：

jQuery.ajax({// just showing how to handle error property
       error: function(jqXHR,error, errorThrown) {  
           if(jqXHR.status && jqXHR.status==400){
                alert(jqXHR.responseText); 
           }else{
               alert("Something went wrong");
           }
      }
}); 

通用 Ajax 错误处理

如果我需要对所有 ajax 请求进行一些通用错误处理。我将设置 ajaxError 处理程序并在 html 内容顶部名为 errorcontainer 的 div 上显示错误。

$("div#errorcontainer")
.ajaxError(
    function(e, x, settings, exception) {
        var message;
        var statusErrorMap = {
            '400' : "Server understood the request, but request content was invalid.",
            '401' : "Unauthorized access.",
            '403' : "Forbidden resource can't be accessed.",
            '500' : "Internal server error.",
            '503' : "Service unavailable."
        };
        if (x.status) {
            message =statusErrorMap[x.status];
                            if(!message){
                                  message="Unknown Error \n.";
                              }
        }else if(exception=='parsererror'){
            message="Error.\nParsing JSON Request failed.";
        }else if(exception=='timeout'){
            message="Request Time out.";
        }else if(exception=='abort'){
            message="Request was aborted by the server";
        }else {
            message="Unknown Error \n.";
        }
        $(this).css("display","inline");
        $(this).html(message);
   });