使用Apache命令的文件上传问题JSP/Servlet中的文件上传API

发布于 2024-10-27 13:59:53 字数 2134 浏览 1 评论 0原文

我正在尝试使用 org.apache.commons.fileupload 上传文件。但我不知道，我犯了什么错误，我在 servlet 中收到以下错误。请任何人帮助我解决这个问题..这是我收到的错误。

     javax.servlet.ServletException: Servlet execution threw an exception


 root cause 

 java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream
org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem(DiskFileItemFactory.java:199)
org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:361)
org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126)
upload1.doPost(upload1.java:34)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

这是我的 servlet 代码

   if (ServletFileUpload.isMultipartContent(req)) {

         // Create a factory for disk-based file items
         FileItemFactory factory = new DiskFileItemFactory();

         // Create a new file upload handler
         ServletFileUpload upload = new ServletFileUpload(factory);

         // Parse the request
         try {
             List<FileItem> items = upload.parseRequest(req);
             for (FileItem item : items) {
                 // process only file upload - discard other form item types
                 if (item.isFormField()) continue;

                 String fileName = item.getName();
                 // get only the file name not whole path
                 if (fileName != null) {
                    // fileName = FilenameUtils. getName(fileName);
                 }


             }
         } catch (Exception e) {
             res.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                     "An error occurred while creating the file : " + e.getMessage());
         }

     } else {
         res.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE,
                         "Request contents type is not supported by the servlet.");
     }

和表格，

          <form method="POST" action="upload1" enctype="multipart/form-data" >

谢谢

原文

im trying to upload a file using org.apache.commons.fileupload. but i dont no, what mistake i have made im getting the following error in my servlet. please any one help me on this..this is the error im getting.

     javax.servlet.ServletException: Servlet execution threw an exception


 root cause 

 java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream
org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem(DiskFileItemFactory.java:199)
org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:361)
org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126)
upload1.doPost(upload1.java:34)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

this is my servlet code

   if (ServletFileUpload.isMultipartContent(req)) {

         // Create a factory for disk-based file items
         FileItemFactory factory = new DiskFileItemFactory();

         // Create a new file upload handler
         ServletFileUpload upload = new ServletFileUpload(factory);

         // Parse the request
         try {
             List<FileItem> items = upload.parseRequest(req);
             for (FileItem item : items) {
                 // process only file upload - discard other form item types
                 if (item.isFormField()) continue;

                 String fileName = item.getName();
                 // get only the file name not whole path
                 if (fileName != null) {
                    // fileName = FilenameUtils. getName(fileName);
                 }


             }
         } catch (Exception e) {
             res.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                     "An error occurred while creating the file : " + e.getMessage());
         }

     } else {
         res.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE,
                         "Request contents type is not supported by the servlet.");
     }

and form

          <form method="POST" action="upload1" enctype="multipart/form-data" >

thank u

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此岸叶落 2024-11-03 13:59:53

java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream

它只是告诉您运行时类路径中缺少提到的类。正如包名称所暗示的那样，它是 Apache Commons IO 的一部分。您可以下载它来自 http://commons.apache.org/io。解压下载的 zip，将 JAR 文件放入 /WEB-INF/lib 中，重建/重新部署/重新启动 web 应用程序/服务器，此错误应该会消失。