java springboot文件上传

Question

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.multipart.MultipartException: Failed to parse multipart servlet request; nested exception is java.io.IOException: org.apache.tomcat.util.http.fileupload.FileUploadException: Stream ended unexpectedly] with root cause

org.apache.tomcat.util.http.fileupload.MultipartStream$MalformedStreamException: Stream ended unexpectedly
    at org.apache.tomcat.util.http.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:981) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.util.http.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:879) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at java.io.InputStream.read(InputStream.java:101) ~[na:1.8.0_181]
    at org.apache.tomcat.util.http.fileupload.util.Streams.copy(Streams.java:98) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.util.http.fileupload.util.Streams.copy(Streams.java:68) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.util.http.fileupload.MultipartStream.readBodyData(MultipartStream.java:572) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.util.http.fileupload.MultipartStream.discardBodyData(MultipartStream.java:596) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.util.http.fileupload.impl.FileItemIteratorImpl.findNextItem(FileItemIteratorImpl.java:266) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.util.http.fileupload.impl.FileItemIteratorImpl.hasNext(FileItemIteratorImpl.java:297) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:283) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.connector.Request.parseParts(Request.java:2922) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.connector.Request.getParts(Request.java:2824) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.connector.RequestFacade.getParts(RequestFacade.java:1098) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:95) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:88) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:87) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1178) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1012) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:652) ~[tomcat-embed-core-9.0.46.jar:4.0.FR]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.46.jar:4.0.FR]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_181]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.46.jar:9.0.46]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]

    @PostMapping(value = "/addq")
    public void addRole12(MultipartHttpServletRequest request) throws IOException {

        request.getFileMap();
       /* String filePath = System.getProperty("user.dir")+File.separator;

        File images = new File(filePath+image.getOriginalFilename());
        image.transferTo(images);

        File xl = new File(filePath +System.currentTimeMillis()+file.getName());
        file.transferTo(xl);

        byte[] bytes = IOUtils.toByteArray(FileUtil.getInputStream(images));
        String encode = Base64.encode(bytes);

        Document document = XmlUtil.readXML(xl);
        cn.hutool.json.JSONObject jsonObject2 = JSONUtil.xmlToJson(XmlUtil.format(document));
        cn.hutool.json.JSONObject s = jsonObject2.getJSONObject("EventNotificationAlert");
        s.put("image",encode);
        s.put("HikvisionCamera","Hikvision");
        String jsonStringData = s.toString();

        LeavePosition leavePosition = JSONObject.parseObject(jsonStringData, LeavePosition.class);
        System.out.println(leavePosition.toString());
        FileUtil.del(xl);
        FileUtil.del(images);*/

    }

spring boot接受文件时报错

Answer 1

• 你可以看下这个问题的回答https://ask.csdn.net/questions/7445597
• 我还给你找了一篇非常好的博客，你可以看看是否有帮助，链接：java springboot 切割分片上传大文件
• 同时，你还可以查看手册：spring boot-6.使用Spring Boot开发 中的内容
• 除此之外, 这篇博客: java springboot实现图片上传服务器中的 java springboot实现图片上传服务器 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:
  

• ---

  话不多说，直接上代码：

  controller层

  /**
       * 上传应用图标文件
       * @param uploadFile
       * @param request
       * @return
       */
      @PostMapping("/uploadFile")
      public void uploadFile(@RequestParam(value = "file",required = true) MultipartFile uploadFile,
                           HttpServletRequest request) {
           firstService.uploadFile(uploadFile,request);
  
      }
  
  

  service层

  
  import com.trs.dto.Boo;
  import org.springframework.web.multipart.MultipartFile;
  
  import javax.servlet.http.HttpServletRequest;
  
  /**
   * Demo class
   *
   * @author crazy-water
   * @date 11/27/2021 18:23
   */
  public interface FirstService {
      void isNull(Boo boo);
  
      void uploadFile(MultipartFile uploadFile, HttpServletRequest request);
  }
  
  

  serviceImpl层

  @Override
      public void uploadFile(MultipartFile uploadFile, HttpServletRequest request) {
          File folder = new File("D:/Download/");
          if (!folder.isDirectory()) {
              folder.mkdirs();
          }
  
          // 对上传的文件重命名，避免文件重名
          String oldName = uploadFile.getOriginalFilename();
          String newName = UUID.randomUUID().toString()
                  + oldName.substring(oldName.lastIndexOf("."), oldName.length());
          try {
              // 文件保存
              uploadFile.transferTo(new File(folder, newName));
  
              // 返回上传文件的访问路径
              String filePath = request.getScheme() + "://" + request.getServerName()
                      + ":" + request.getServerPort() +uploadFile+ newName;
  
          } catch (IOException e) {
              throw new RuntimeException("错误");
          }
      }
  
  

  最后看结果，此处把本机当成服务器，如图：
  
  初始没有文件，postman发送请求上传文件后，如图：
  
  结果：
  

• 您还可以看一下 章秀淞老师的Java全栈一课通课程中的 spring boot的全局配置小节, 巩固相关知识点
  
• 以下回答由chatgpt基于相关博客总结生成:

  解决Spring Boot在接收文件时报错的问题可以按以下步骤进行：

  1. 确认错误信息：首先需要确定报错的具体信息，包括异常类型和堆栈跟踪等。这些信息可以帮助我们更好地理解问题的本质。

  2. 检查代码逻辑：检查上传文件的相关代码逻辑，包括Controller中的文件上传方法和相关依赖注入等。确保代码逻辑正确，并且相关组件的配置正确。

  3. 检查文件上传配置：检查application.properties或application.yml文件中的相关配置，确保文件上传的路径和大小限制等配置正确。

  4. 检查依赖引入：检查pom.xml文件中相关的依赖，包括spring-boot-starter-web、spring-boot-starter-tomcat、spring-boot-starter-data-jpa等，确保与文件上传相关的依赖正确引入。

  5. 检查文件大小限制：在Spring Boot中，默认情况下，文件上传的大小被限制为1MB。如果上传的文件大小超过了默认限制，可以通过配置multipart.max-file-size和multipart.max-request-size属性来修改限制。

  例如，在application.properties中添加以下配置：

     spring.servlet.multipart.max-file-size=10MB
     spring.servlet.multipart.max-request-size=10MB
  

  1. 检查文件保存路径：检查上传文件的保存路径，确保路径存在并具备写入权限。可以通过配置spring.servlet.multipart.location属性来指定保存路径。

  例如，在application.properties中添加以下配置：

     spring.servlet.multipart.location=/path/to/upload/directory
  

  1. 使用MultipartFile接收文件：在文件上传的Controller方法中，使用MultipartFile作为参数来接收文件。

  例如：

     @PostMapping("/upload")
     public String uploadFile(@RequestParam("file") MultipartFile file) {
        // 处理文件上传逻辑
     }
  

  1. 处理文件上传逻辑：根据业务需求，编写相应的文件上传逻辑，包括保存文件、验证文件类型和大小等操作。

  例如：

     @PostMapping("/upload")
     public String uploadFile(@RequestParam("file") MultipartFile file) {
        if (!file.isEmpty()) {
           String fileName = file.getOriginalFilename();
           // 保存文件
           File uploadedFile = new File("/path/to/upload/directory/" + fileName);
           try {
              file.transferTo(uploadedFile);
           } catch (IOException e) {
              // 处理文件保存异常
           }
        } else {
           // 文件为空，处理逻辑
        }
        // 其他逻辑
     }
  

  如果以上步骤都正确无误，那么应该能够解决Spring Boot在接收文件时报错的问题。如果问题仍然存在，请提供具体的错误信息以便进一步调查和分析。