FileUpload：找不到DeferredFileOutputStream类？ [英] FileUpload: DeferredFileOutputStream class not found?

问题描述

我正在使用apache FileUpload来处理..文件上传。我在码头上用它。 servlet看到multipart请求，但在执行时抛出NoClassDefFoundError异常：

I'm using apache FileUpload to handle a.. file upload. I'm using it with jetty. The servlet sees the multipart request, but throws a NoClassDefFoundError exception upon execution:

protected void doPost(HttpServletRequest request, HttpServletResponse response) 
  throws ServletException, IOException 
{
  boolean isMultipart = ServletFileUpload.isMultipartContent(req);
  if (isMultipart) {
    try {
      FileItemFactory factory = new DiskFileItemFactory();

      ServletFileUpload upload = new ServletFileUpload(factory);

      List items = upload.parseRequest(req); //  exception
      ...

抛出：

java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream
   at org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem(DiskFileItemFactory.java:199)

由以下原因引起：

java.lang.ClassNotFoundException: org.apache.commons.io.output.DeferredFileOutputStream

除了commons-fileupload-1.2.2.jar还需要包含额外的jar吗？

Is there an additional jar we need to include besides commons-fileupload-1.2.2.jar?

我的目标是上传单个文件并将其写入磁盘。

My goal is to just upload a single file and write it to disk.

谢谢

推荐答案

您需要将 CommonsIO 添加到类路径中。 Commons File Upload取决于它。

You need to add CommonsIO to the classpath. Commons File Upload is dependent on it.

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