无法解析多部分 servlet 请求，嵌套异常是 org.apache.commons.fileupload.FileUploadException

Question

当我使用 CommonsMultipartResolver 库在 Spring 中上传 10 MB 大小的 csv 文件时出现错误。我已经在 xml 文件中完成了以下设置 Xml 文件配置：

 <beans:bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- max upload size in bytes -->
<beans:property name="maxUploadSize" value="99971520" /> <!-- 99MB -->

<!-- max size of file in memory (in bytes) -->
<beans:property name="maxInMemorySize" value="1048576" /> <!-- 1MB -->

控制器代码：

 @RequestMapping(value="/uploadForm",method = RequestMethod.POST)
public @ResponseBody  String  uploadForm1(@ModelAttribute("admin") BillingAndRecon  billingandrecon,@RequestParam String id,BindingResult result,Principal principal,@RequestParam MultipartFile file,HttpSession session) throws ServiceException, DaoException, IllegalStateException, IOException {


    File uploadFile = null;
    String msg = "";

    if (!file.getOriginalFilename().equals("")) {

        logger.info("Before  Multipart file get path >> ");
        BillingAndReconServiceImpl asi = (BillingAndReconServiceImpl) this.billingAndReconService;// not correct!!
        String uploadDirectoryPath = asi.getUploadDirectoryPath(); // not correct!!

        uploadFile = new File( uploadDirectoryPath + file.getOriginalFilename());
        logger.info("Before  Multipart file get path uploadDirectoryPath >> "+uploadDirectoryPath);
        file.transferTo(uploadFile);
    }
}

表单页面：

<form:form action="./uploadForm" method="post" enctype="multipart/form-data" ModelAttribute=="admin">
          <input type="file" name="file" />
          <input type="text" name="id" />
           </form:form>

但我不明白什么是问题。我尝试设置大小和设置标题也enctype="multipart/form-data"，但尚未解决。

以下是错误：

org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; nested exception is org.apache.commons.fileupload.FileUploadException: the request was rejected because no multipart boundary was found] with root cause org.apache.commons.fileupload.FileUploadException: the request was rejected because no multipart boundary was found
at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:954)
at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:331)
at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:351)
at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126)
at org.springframework.web.multipart.commons.CommonsMultipartResolver.parseRequest(CommonsMultipartResolver.java:156)
at org.springframework.web.multipart.commons.CommonsMultipartResolver.resolveMultipart(CommonsMultipartResolver.java:139)
at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1047)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:892)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:827)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)

Answer 1

正如 @ChristianMaioliM 在评论中要求的那样，添加了更多关于 您的代码中的问题是BindingResult 参数未遵循模型对象。

Errors 或 BindingResult 参数必须跟在被立即绑定的模型对象之后，因为方法签名可能有多个模型对象，并且 Spring 将为它们中的每一个创建一个单独的 BindingResult 实例，因此以下示例将不起作用

参考文档Invalid ordering of BindingResult and @ModelAttribute

要解决此问题，请更改控制器方法处理程序签名以遵循 BindingResult 和模型对象之间的参数顺序，例如：

发件人：

@RequestMapping(value="/uploadForm",method = RequestMethod.POST)
public @ResponseBody  String  uploadForm1(@ModelAttribute("admin") BillingAndRecon  billingandrecon,@RequestParam String id,BindingResult result,Principal principal,@RequestParam MultipartFile file,HttpSession session) throws ServiceException, DaoException, IllegalStateException, IOException {

收件人：

@RequestMapping(value="/uploadForm",method = RequestMethod.POST)
public String  uploadForm1(
            @ModelAttribute("admin") BillingAndRecon billingandrecon, 
            BindingResult result,
            Principal principal,
            HttpSession session) throws ServiceException, DaoException, IllegalStateException, IOException {
  //do file save here
  return "some-view-name";
}

并在 BillingAndRecon 类中添加多部分/绑定字段，例如：

public class BillingAndRecon {
  private MultipartFile file;
  private String id;

  no-arg constructor;
  getters;
  setters;
}

注意： BindingResult 参数应该在@ModelAttrubiute/@RequestBody 的立即数之后

和jsp形式：

<form:form action="${pageContext.request.contextPath}/uploadForm"  
   method="post" 
   enctype="multipart/form-data" 
   modelAttribute="admin">
      <input type="file" name="file" />
      <form:input path="id" />
</form:form>

并且不要忘记在 GET 处理程序中添加绑定实例，例如：

@RequestMapping(value="/uploadForm",method = RequestMethod.GET)
public String uploadFormView(Model model){
  model.addAttribute("admin", new BillingAndRecon());
  return "your-upload-view-name";
}

Answer 2

有时，如果过滤器链中有任何特定于应用程序的过滤器，并且如果它们正在关闭流，则您会收到此异常。 从异常堆栈跟踪中，查找是否存在任何特定于应用程序的过滤器并禁用它们并检查

Answer 3

org.springframework.web.multipart.MultipartException：解析多部分servlet请求失败；嵌套异常是 java.io.IOException: org.apache.tomcat.util.http.fileupload.FileUploadException: Stream closed

在 Spring Boot 2.1.12 上运行良好，升级到 2.2.4 后失败（两个版本运行相同的嵌入式 Tomcat 9.0.30）。

根本原因是我们使用了 logback-access 过滤器来记录请求和响应。过滤器使用缓存包装器包装 HttpServletRequest 并在沿过滤器链传递请求之前关闭输入流。这在调用 javax.servlet.http.HttpServletRequest#getParts 时导致了一个问题，因为该调用被委托给原始 Tomcat 的请求（具有现在关闭的输入流），然后导致“流关闭”异常。

触发此问题的 Spring 更改是 hiddenHttpMethodFilter 不再存在于过滤器链中。以前这个过滤器是第一个被调用的过滤器，它会调用 HttpServletRequest#getParameter，这反过来会使 Tomcat 的请求实现解析多部分内容并将这些部分存储在对象中（以便以后调用#getParts 将使用并且不再尝试解析它们）。

我将此报告给 Logback：https://jira.qos.ch/browse/LOGBACK-1503

解决方法 - 在将请求传递给 logback 的过滤器之前调用 HttpServletRequest#getParameter（有关代码，请参阅 LOGBACK-1503），以强制 Tomcat 在输入流仍处于打开状态时解析和存储请求部分。