Question

我尝试使用Spring和CommonsMultipartResolver上传大文件（非常类似于this related topic

上传即使是小文件（少量Kb）的结果如下：

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this 
as a fallback.

Fri Mar 02 23:54:59 MSK 2018
There was an unexpected error (type=Bad Request, status=400).
Required request part 'file' is not present

这是我的UploadController.java＆＃34; / upload＆＃34;方法代码：

@PostMapping(value = "/upload", consumes = 
MediaType.MULTIPART_FORM_DATA_VALUE)
public String singleFileUpload(@RequestParam("file") 
MultipartFile file,
                        RedirectAttributes redirectAttributes){

    if (file.isEmpty()){
        redirectAttributes.addFlashAttribute("message", "Файл для загрузки не выбран. Выберите файл в диалоге");
        return "redirect:/files";
    }

    try {

        BufferedOutputStream outputStream = new BufferedOutputStream(
                new FileOutputStream(
                        new File(UPLOAD_LOCATION + "\\", 
file.getOriginalFilename())));
        outputStream.write(file.getBytes());
        outputStream.flush();
        outputStream.close();

String.format("Файл %s успешно загружен", file.getOriginalFilename()));

    } catch (IOException e) {
        e.printStackTrace();
    }

    return "redirect:/files";

}

我的表单代码：

＆＃13;

<div class="form-group">
<form method="post" enctype="multipart/form-data" action="/upload">
<input type="file" class="file" name="file" />
<small id="fileHelp" class="form-text text-muted">Выберите файл для загрузки в файловый каталог приложения. После загрузки файл автоматически появится в этом списке. </small>
<button type="submit" class="btn btn-default">Загрузить на сервер</button>
</form>
</div>

＆＃13;

和注释bean定义：

@Bean
public MultipartResolver multipartResolver() { CommonsMultipartResolver 
multipartResolver = new CommonsMultipartResolver();
multipartResolver.setMaxUploadSize(10 * 1024 * 1024 * 1024); // 10 GB
multipartResolver.setMaxUploadSizePerFile(3 * 1024 * 1024 * 1024); // 3 GB
return multipartResolver;
}

和application.properties：

spring.http.multipart.max-file-size=3000MB
spring.http.multipart.max-request-size=3000MB

我有一个正确的属性名称＆＃34; file＆＃34;在表单输入和@RequestParam值，我也在@PostMapping注释写了一个MediaType，但它仍然无法工作。此外，我注意到，当我没有定义CommonsMultipartResolver bean时，上传工作正常，但只有少于300 Mb的文件......

我做错了什么？

Answer 1

尝试将以下属性添加到您的.properties文件中：

multipart.enabled=true

Spring Thymeleaf必填请求部分＆＃39; file＆＃39;不在场

1 个答案: