用 spring 引導上傳文件

Question

我正在嘗試進行簡單的文件上傳，但它給出了一個錯誤，下面是我是如何做到的。

形式：

<div class="container">
   <div th:replace="~{base :: titulo('Disparar Holerites')}"></div>
    <div class="card mt-3">
      <form class="card-body needs-validation" action="/holerite/uploadHoleritesFile" method="POST" enctype="multipart/form-data" novalidate>
        <div>
            <label for="arquivoContabilidade" class="form-label">Arquivo Recebido da Contabilidade</label>
            <div class="input-group has-validation mb-4">
                <input accept=".pdf"  type="file" class="form-control" id="arquivoContabilidade" aria-describedby="inputGroupPrepend" required>

            </div>
        </div>
        <button class="btn btn-primary" type="submit">Enviar</button>
      </form>
  </div>

Controller：

@PostMapping(value = "uploadHoleritesFile")
public String uploadHoleritesFile(@RequestParam("arquivoContabilidade") MultipartFile arquivoContabilidade, RedirectAttributes redirectAttributes){
    logger.info("Entramos aqui");
    logger.info("Recebido o arquivo: "+!arquivoContabilidade.isEmpty());
    if(arquivoContabilidade.isEmpty()){
        return "redirect:holerites/passo1";
    }
    try{
        byte[] bytes = arquivoContabilidade.getBytes();
        Path path = Paths.get(COTABILIDADE_FOLDER + arquivoContabilidade.getOriginalFilename());
        Files.write(path, bytes);


    } catch (IOException e){
        e.printStackTrace();
    }
    return "holerites/passo2";


}

錯誤：

2022-02-04 18:36:41.048 DEBUG 17136 --- [nio-8080-exec-9] osweb.servlet.DispatcherServlet：POST“/error”的“ERROR”調度，參數={multipart} 2022-02- 04 18:36:41.057 調試 17136 --- [nio-8080-exec-9] swsmmaRequestMappingHandlerMapping: 映射到 org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController#errorHtml(202-0, 2-HttpServletResponse) 04 18:36:41.077 調試 17136 --- [nio-8080-exec-9] oswsvContentNegotiatingViewResolver: 給定 [text/html, text/html;q=0.8] 2022-02-04 18:36 選擇的 'text/html' ：41.081 DEBUG 17136 --- [nio-8080-exec-9] osweb.servlet.DispatcherServlet：退出“錯誤”調度，狀態 403

Answer 1

您應該在 html 的輸入字段中添加一個屬性name="arquivoContabilidade" 。 Thymeleaf 在將其映射到多部分文件時使用name屬性。

例子：

<input accept=".pdf" name="arquivoContabilidade" type="file" class="form-control" id="arquivoContabilidade" aria-describedby="inputGroupPrepend" required>

另外，我假設您 controller 有注釋@RequestMapping("/holerite") 。

如果沒有，你也必須改變

@PostMapping(value = "uploadHoleritesFile")

至

@PostMapping(value = "/holerite/uploadHoleritesFile")

因為你的表單有<form action="/holerite/uploadHoleritesFile" method="POST"...>