javascript - 来自 http 409 的 Ajax 解析响应

Question

尝试使用 Ajax 解析出消息对象，但无法获得对 messages.msg 的引用。它确实使用 PostMan 正确显示，但无法在 Ajax 中获取此消息。

PostMail 正确处理响应:

    {
       "httpStatusCode": 409,
       "httpStatus": "CONFLICT",
       "messages": {
           "msg": "ticket 1112 is owned by 2223"
    }
}

Ajax

fail(function(xhr, status, error) {
//fail(function(err) { did not work
        //console.log(err);    did not work
        //xhr.responseText;    did not work
        //var msg = $.parseJSON(err).msg;  did not work
        //alert(msg);   did not work
        var acc = []
        $.each(xhr, function(index, value) {
            acc.push(index + ': ' + value);
        });
        alert(JSON.stringify(acc));   //did not see any object which includes  response message
        console.log('FAIL');
    })

完成显示非常适合 202 接受

done(function(data, statusText, xhr) {
        console.log('SUCCESS');
        alert(data.messages.msg);
    })

Answer 1

必须捕获 409，然后添加到正文:
捕捉(HttpClientErrorException ex){
返回

ResponseEntity.status(HttpStatus.CONFLICT).body(ex.getResponseBodyAsString()); –

然后在 .fail 中访问
var 数据 = JSON.parse(jqXHR.responseText);