请求被拒绝，因为在springboot中找不到多部分边界

Question

我正在用spring boot和带有postman chrome插件的Web服务尝试这一点。

在postmancontent type=“multipart/form data”中，我得到了以下例外。

HTTP Status 500 - Request processing failed; 
nested exception is org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; 
nested exception is java.io.IOException: 
org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found

在控制器中，我指定了以下代码

@ResponseBody
@RequestMapping(value = "/file", headers = "Content-Type= multipart/form-data", method = RequestMethod.POST)

public String upload(@RequestParam("name") String name,
        @RequestParam(value = "file", required = true) MultipartFile file)
//@RequestParam ()CommonsMultipartFile[] fileUpload
{
    // @RequestMapping(value="/newDocument", , method = RequestMethod.POST)
    if (!file.isEmpty()) {
        try {
            byte[] fileContent = file.getBytes();
            fileSystemHandler.create(123, fileContent, name);
            return "You successfully uploaded " + name + "!";
        } catch (Exception e) {
            return "You failed to upload " + name + " => " + e.getMessage();
        }
    } else {
        return "You failed to upload " + name + " because the file was empty.";
    }
}

这里我指定文件处理程序代码

public String create(int jonId, byte[] fileContent, String name) {
    String status = "Created file...";
    try {
        String path = env.getProperty("file.uploadPath") + name;
        File newFile = new File(path);
        newFile.createNewFile();
        BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(newFile));
        stream.write(fileContent);
        stream.close();
    } catch (IOException ex) {
        status = "Failed to create file...";
        Logger.getLogger(FileSystemHandler.class.getName()).log(Level.SEVERE, null, ex);
    }
    return status;
}

Answer 1

这对我很有用：通过Postman将文件上传到SpringMVC后端webapp：

Answer 2

在Postman中取消选中内容类型，并且postman会根据您在运行时的输入自动检测内容类型。

Answer 3

问题是你自己在设置Content-Type，让它是空白的，谷歌Chrome会为你做的，多部分Content-Type需要知道文件边界，当你移除Content-Type时，Postman会自动为你做的。