开源项目fastupload 0.2.3发布

fastupload 0.2.3发布，增加了对sub-boundary的支持，修复了一个在0.1.1版本中发现的可能因为数据块末尾不包含完整上传文件信息的bug，新增加类，HttpFileUploadParser，担负文件上传的解析工作，原类FileUploadParser不再承担解析Http文件的功能。

新的api使用如下，

@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

//创建DiskFileFactory, 以utf－8编码解析文件上传请求，指定解析后文件存放在用户home目录下
		DiskFileFactory dff = new DiskFileFactory(System.getProperty("user.home") + "/", "utf-8"); 
		HttpFileUploadParser parser = new HttpFileUploadParser(req, dff);
		parser.parse();
	}

fastupload是目前为止处理文件上传类中最快的java实现，比apache common file upload快约约30~40%，内存占用小。

下载地址，https://sourceforge.net/projects/fastupload/files/

未来：
fastupload将会提供对Spring MVC、Struts2等流行web开发框架的支持。


历史：
开源项目fastupload 0.1.1发布， 链接： http://www.iteye.com/topic/1123990

评论

2 楼 Mojarra 2012-07-11  

cokolin 写道

借问一声，跟Servlet3.0-api新的文件上传类 javax.servlet.http.Part，相比，那个性能比较好呢？

测试了一下Servlet3.0规范中的，限于时间关系，只测试了比较小的那组文件（可以看这里， http://mojarra.iteye.com/blog/1581521）， 从数据上看，Servlet 3.0规范中的文件上传部分的API性能不及Apache Common File Upload。下面是测试数据

Servlet 3 upload costs: 38 
Servlet 3 upload costs: 12 
Servlet 3 upload costs: 14 
Servlet 3 upload costs: 12 
Servlet 3 upload costs: 12 
Servlet 3 upload costs: 11 
Servlet 3 upload costs: 15 
Servlet 3 upload costs: 15 
Servlet 3 upload costs: 16 
Servlet 3 upload costs: 13 
Servlet 3 upload costs: 12 
Servlet 3 upload costs: 11 
Servlet 3 upload costs: 12 
Servlet 3 upload costs: 17 
Servlet 3 upload costs: 11 
Servlet 3 upload costs: 15 
Servlet 3 upload costs: 15 
Servlet 3 upload costs: 183 
Servlet 3 upload costs: 44 

完整的测试代码，有兴趣可以自己测试一下

@WebServlet("/s3upload")
@MultipartConfig()
public class Servlet3FileUpload extends HttpServlet {
	private static final long serialVersionUID = 1L;

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
			IOException {
		String home = System.getProperty("user.home");
		long s = System.currentTimeMillis();
		Collection<Part> parts = request.getParts();
		for (Part p : parts) {
			String fn = String.format("%s/%s", home, p.getName());
			FileOutputStream out = new FileOutputStream(new File(fn));
			byte[] buffer = new byte[8192];
			InputStream is = p.getInputStream();
			int c = 0;
			while ((c = is.read(buffer)) != -1) {
				out.write(buffer, 0, c);
			}
			out.close();
		}
		System.out.format("Servlet 3 upload costs: %d %n", System.currentTimeMillis() - s);
	}
}

1 楼 cokolin 2012-07-06  

借问一声，跟Servlet3.0-api新的文件上传类 javax.servlet.http.Part，相比，那个性能比较好呢？