使用spring boot上载文件

Question

我试图做一个简单的文件上传，但它给出了一个错误，下面是我如何做到的。

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>

控制器：

@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";


}

错误：

2022-02-04 18:36:41.048DEBUG 17136---[nio-8080-exec-9]o.s.web.servlet.DispatcherServlet："ERROR"调度为POST"/error"，参数={multipart}2022-02-04 18:36:41.057DEBUG 17136---[nio-8080-exec-9]s. w. s. m. m. a. Request estMappingHandlerMap：映射到org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController#errorHtml（HttpServletRequest， HttpServletACK）2022-02-04 18:36:41.077DEBUG 17136---[nio-8080-exec-9]o. s. w. s. v. ContentNe谈判视图解析器：选定的"text/html"给定[text/html， text/html； q=0.8]2022-02-04 18:36:41.081DEBUG 17136---[nio-8080-exec-9]o.s.web.servlet.DispatcherServlet：退出"ERROR"调度，状态403

Answer 1

您应该在html的输入字段中添加一个属性。Thymeleaf在将其映射到多部分文件时使用name属性。

示例：

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

此外，我假设您的控制器具有注释RequestMapping（“/holerite”）。

如果没有，你也必须改变

@PostMapping(value = "uploadHoleritesFile")

到

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

因为您的表单具有<代码>