Jakarta Commons FileUpload User Manual

About this manual

This manual introduces the Jakarta Commons FileUpload library, explaining its basic concepts and how to integrate it into servlet or portlet applications. It describes the library's ability to parse multipart HTTP requests and provides examples of simple and advanced usage.

The guide also details configuration options such as memory thresholds, temporary file repositories, request size limits, and progress listeners, helping developers control resource usage and monitor upload progress. This manual is written in Chinese.

What's inside

• Using FileUpload
• How FileUpload Works
• Servlets and Portlets
• Parsing Requests
• Processing Uploaded Items
• Cleaning Resources
• Observing Upload Progress

Specifications

Frequently asked questions

How can I check if a request is a multipart upload?

Call ServletFileUpload.isMultipartContent(request) to determine if the request contains a file upload.