Question

我的Ajax发布存在问题。阿贾克斯：

    var formData = new FormData();
    formData.append('file', files);
    formData.append("url", url);
    $.ajax({
        url : "/servisDetail/uploadSoubor",
        type : 'GET',
        processData: false,
        contentType: false,
        data : formData,           
        success : function(response) { 
            console.log(response);
            //vypisPrilohy(response);
        },
        error: function (xhr) { }
    });

和Java：

@RequestMapping(value = "/servisDetail/uploadSoubor", method= RequestMethod.GET)
public @ResponseBody
ModelMap servisDetailUploadFile(@RequestParam(value = "file",required = false) MultipartFile soubor,
                                @RequestParam(value = "url",required = false) String odkaz,
                                Locale locale){
    ModelAndView model = new ModelAndView();
    System.err.println("File: " + soubor + " and " + odkaz);
    return model.getModelMap();
}

但是打印到控制台的是：File：null和null。

没有processData：false我有一个ajax错误：非法调用并输入get或post仍然相同

有人知道如何解决吗？

Answer 1

这是因为您没有将正确的文件附加到formData。请参阅How to use FormData for ajax file upload。我尝试了下面的代码，它顺利通过了测试。

<html>
<head>
<title>Test</title>
</head>
<body>
<input type="file" name="file">
<script src="jquery-3.3.1.min.js"></script>
<script type="text/javascript">
$(function(){
    $('[name=file]').on('change', function(){
        var formData = new FormData();
        formData.append('file', $(this)[0].files[0]);
        formData.append("url", 'https://stackoverflow.com/questions/51235726/spring-ajax-send-value-but-null');
        $.ajax({
            url : "/servisDetail/uploadSoubor",
            type : 'POST',
            processData: false,
            contentType: false,
            data : formData,           
            success : function(response) { 
                console.log(response);
                //vypisPrilohy(response);
            },
            error: function (xhr) { }
        });
    })
});
</script>
</body>
</html>

我在控制台中得到了类似File: org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile@4b5db24c and https://stackoverflow.com/questions/51235726/spring-ajax-send-value-but-null的输出

Answer 2

最后，我做了不同的事情。谢谢。

        $.ajax({
        url : "/servisDetail/uploadSoubor",
        type : 'GET',
        dataType: 'json',
        contentType: 'application/json',
        data : {
            fileSize: files.size,
            fileName: files.name,
            url: url
        },         
        success : function(response) { 
            console.log(response);
            vypisPrilohy(response);
        },
        error: function (xhr) { }
    });

并使用ByteArrayInputStream byteArray = new ByteArrayInputStream(new byte[fileSize]);

Spring Ajax发送值但为空

2 个答案: