Question

我是开发和Spring Boot的新手.. 我想创建一个上传文件的应用程序并显示它的哈希值我设法创建一个基本的应用程序，但当我尝试做一个表单和“POST” 我在STS控制台上收到以下错误的文件：请求方法“POST”不受支持能否请你帮忙？这是我的控制器代码：

package controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/")
public class FileUploadController {

    @RequestMapping(value = "/", method = RequestMethod.POST)
    public void downloadFile(@RequestParam(value="file") String file){

    }

}

Answer 1

@PostMapping("/")
public String handleFileUpload(@RequestParam("file") MultipartFile file,
        RedirectAttributes redirectAttributes) {

    storageService.store(file);
    redirectAttributes.addFlashAttribute("message",
            "You successfully uploaded " + file.getOriginalFilename() + "!");

    return "redirect:/";
}



<form method="POST" enctype="multipart/form-data" action="/">
        <table>
            <tr><td>File to upload:</td><td><input type="file" name="file" /></td></tr>
            <tr><td></td><td><input type="submit" value="Upload" /></td></tr>
        </table>
    </form>

Answer 2

我想我明白了。我已经删除了存储服务，只是将重定向发布到test.html 它工作正常我只需要知道如何操作这个文件并将其哈希值返回给web应用程序

update [Table] set [Count]= isnull((select top 1 [Previous].[Count] 
                                    from [Table] as [Previous]
                                    where [Previous].[Count] <> 0 and 
                                          [Previous].[Date] <= [Table].[Date] and
                                          [Previous].[Id] = [Table].[Id]
                                    order by [Previous].[Date] desc),
                                   0) as [Count]

谢谢你们！

尝试上传文件时不支持请求方法“POST”

2 个答案: