fastupload API快速上手：报错

等提供了对struts2、spring mvc3的注解(annotation)一些高级特性的支持,而且不是SNAPSHOT版了时,在好好试试.^_^######对这些特性的支持，和这个表单文件上传的本身关系不大，不过能方便这些框架的使用者######您好，能给介绍少为啥会说他的效率在java实现中，比common-fileupload 要快吗?######fastupload采用了BM算法，查找的效率比commons fileupload的算法效率高，而commons fileupload采取的是类似于KMP查找######我使用过fileupload和cos,在实际应用中cos是要比fileupload快，当时cos很久不更新了，不知道这个如何。######我测试的样本是1.7M， 1.7M，1.2M的三个文件，得出的结论是给予这个测试的，不知道你测试的样本是什么样的，能否告诉我？######持续关注.######

######补充一下，测试的环境为tomcat 7， jdk 6
######在这里回复 @仪山湖 已经有一段时间，记得不太清了，是当时分别用fileupload和cos各写了1个servlet做后台，前台用的是一个Flex插件叫FlashFileupload，Flex插件上有上传速度和百分比，上传同一文件，进行比较，小文件差距不太明显，文件越大，cos的优势就越来越明显。用的是tomcat6，jdk6。######能否贴一下你写的代码，供我分析一下######

很简单的servlet，也是从网上收集的

cos

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.oreilly.servlet.MultipartRequest;

public class CosUploadHandler extends HttpServlet {
	public void doGet(HttpServletRequest  request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request,response);
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("text/xml; charset=utf-8");
		String rootPath = "D:\\";
		PrintWriter out = response.getWriter();
		String uploadDir = null; 
//		int fileNum = 0;
		if(request.getParameter("folder") != null) {
			uploadDir = request.getParameter("folder");
			uploadDir = rootPath + uploadDir;
		}
		uploadDir = "D:\\upload";
//		if(request.getParameter("fileNum")!= null) {
//			fileNum = Integer.parseInt(request.getParameter("fileNum"));
//		}
		int maxPostSize = 200 * 1024 * 1024;
		MultipartRequest multipartRequest = null;
		try {
			multipartRequest = new MultipartRequest(request,uploadDir,maxPostSize,"utf-8");
		} catch(IOException ex) {
			out.println("error!");
			out.flush();
			out.close();
			return;
		}
		Enumeration<?> fileNames = multipartRequest.getFileNames();
	
		while(fileNames.hasMoreElements()) {
			String fileName = (String)fileNames.nextElement();
			multipartRequest.getFile(fileName);
			System.out.println(multipartRequest.getFilesystemName(fileName));
		}
		out.println("success!");
		out.flush();
		out.close();
	}
}

 fileupload

import java.io.File;
import java.io.IOException;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class FileUploadHandler extends HttpServlet {
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request,response);
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("text/xml; charset=utf-8");
//		PrintWriter out = response.getWriter();
		String uploadDir = null;
		if(request.getParameter("uploadDir") != null) {
			uploadDir = request.getParameter("uploadDir");
			uploadDir = "D:\\" +uploadDir;
		}
		uploadDir = "D:\\upload";
		if(!ServletFileUpload.isMultipartContent(request))
		{
//			out.println("只能处理 multipart/form-data 类型的数据!");
			return;
		}
		DiskFileItemFactory fileItemFactory = new DiskFileItemFactory();
		fileItemFactory.setSizeThreshold(1024*1024);
		ServletFileUpload fileUpload = new ServletFileUpload(fileItemFactory);
		fileUpload.setHeaderEncoding("utf-8");
		fileUpload.setFileSizeMax(1024 * 1024 * 200);
		List itemList = null;
		Iterator iterator = null;
		try {
			itemList = fileUpload.parseRequest(request);
		} catch (FileUploadException e) {
//			out.println("解析数据时出现如下问题：");
//			e.printStackTrace(out);
//			e.printStackTrace();
			return;
		}
		iterator = itemList.iterator();
		while(iterator.hasNext()) {
			FileItem fileItem = (FileItem)iterator.next();
			if(!fileItem.isFormField()) {
				String srcPath =  fileItem.getName();
				if(srcPath.trim().equals("")){
					continue;
				}
				String fileName = srcPath.substring(srcPath.lastIndexOf("//") + 1);
				File destFile = new File(uploadDir,fileName);
				try {
					fileItem.write(destFile);
				} catch (Exception e) {
//					out.println("存储文件时出现如下问题：");
//					e.printStackTrace(out);
//					e.printStackTrace();
					fileItem.delete();
					return;
				}
				fileItem.delete();
			}
		}
//		out.flush();
//		out.close();
	}
}

 

######

DiskFileItemFactory不是fastupload中的类，fastupload的代码应该是这样的

DiskFileFactory dff = new DiskFileFactory(System.getProperty("user.home") , "utf-8");
dff.setParseThreshold(0x100000);

HttpFileUploadParser parser = new HttpFileUploadParser(req, dff);


List<MultiPartFile> files = parser.parse();

######作者连代码都不舍得放到版本控制里呀。######只有个源代码包吧？在svn和git里面没找到代码。######源码在sourceforge上 http://sourceforge.net/projects/fastupload/