谷歌应用程序中的rmi错误

问题描述

我在使用以下行时没有收到错误

I dont get the error when I use the following line

    FileItemIterator it = servletFileUpload.getItemIterator(request);

当我使用以下行时我明白了

I get it when I use following line

    List fileItemsList = servletFileUpload.parseRequest(request);

它们有何不同以及 rmi 与 servletFileUpload.parseRequest(request); 有何关系?

How are they different and How is rmi related to servletFileUpload.parseRequest(request);?

错误:原因:

java.lang.NoClassDefFoundError: java.rmi.server.UID is a restricted class. Please see the Google  App Engine developer's guide for more details.
    at com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:51)
    at org.apache.commons.fileupload.disk.DiskFileItem.(DiskFileItem.java:103)
    at org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem(DiskFileItemFactory.java:196)
    at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:358)
    at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126)
    at morefile.CopyOfUploadApp.doPost(CopyOfUploadApp.java:147)

上下文:在谷歌应用程序上使用 Apache 公共库的文件上传应用程序.

Context:A file upload application using Apache commons lib on google apps.

推荐答案

Commons FileUpload (1.2.1) 仅与 GAE 半兼容.仅支持流 API，但不支持传统 API，因为 GAE 不提供本地文件系统.在stacktace中看到了DiskFileItem的用法，基本上就是把上传的文件写到本地，稍后再删除.

Commons FileUpload (1.2.1) is only semi-compatible with GAE. Only streaming API is supported but not the traditional API beacuse a local filesystem is not made available by GAE. In the stacktace, I see usage of DiskFileItem, which basically writes the uploaded file locally and deletes it later.

请参阅位于 GAE 和对 Java 框架的支持

这是流式 API 用法.

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