Apache FileUpload 实现多文件上传，上传到不同文件夹

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Apache Servlet JSP Java HTML

如有好建议谢谢指正

1.首先到Apache 的官方网站下载一个 commons-fileupload-1.2.jar 包加到 lib 中。

2. 建一个jsp 文件代码如下
<%@ page language="java" contentType="text/html; charset=utf-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

</head>

<body>
   <form action="UploadServlet" method="post" enctype="multipart/form-data">
   <input type="file" name="file1" value="浏览">
   <input type="file" name="file2" value="浏览">
   <input type="file" name="file3" value="浏览">
   <br />
   <input type="submit" value="提交">
   </form>
</body>
</html>

3.建一个servlet 名字 UploadServlet 代码如下
package com.czg.servlet;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
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.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class UploadServlet extends HttpServlet {

private static final long serialVersionUID = -4348436020253257220L;
private String uploadPath1="E:\\jsp\\09011\\Fileupload\\WebRoot\\images\\small\\";
private String uploadPath2="E:\\jsp\\09011\\Fileupload\\WebRoot\\images\\more\\";
private String uploadPath3="E:\\jsp\\09011\\Fileupload\\WebRoot\\images\\large\\";
private String tempPath="E:\\jsp\\09011\\Fileupload\\WebRoot\\images\\buffer\\";
File tempPathFile;

@SuppressWarnings("unchecked")
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

try {

DiskFileItemFactory factory = new DiskFileItemFactory();

factory.setSizeThreshold(4096);
factory.setRepository(tempPathFile);
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setSizeMax(4194304);

List<FileItem> items = upload.parseRequest(request);
Iterator<FileItem> i = items.iterator();
while (i.hasNext()) {
FileItem fi = i.next();
String fileName=fi.getName();

String fieldName = fi.getFieldName();

for (int i=1; i < 4 ; i++) {
if (fieldName.equals("filed"+i)) {
if (fileName != null) {
File fullFile = new File(fileName);
File saveFile = new File (uploadPath+i,fullFile.getName());
fi.write(saveFile);
}
}
}

}

} catch(Exception e) {
e.printStackTrace();

}

}

public void init() throws ServletException {
       File uploadFile1 = new File(uploadPath1);
       File uploadFile2 = new File(uploadPath2);
       File uploadFile3 = new File(uploadPath3);
       if (!uploadFile1.exists()) {
           uploadFile1.mkdirs();
       }
       if (!uploadFile2.exists()) {
           uploadFile2.mkdirs();
       }
       if (!uploadFile3.exists()) {
           uploadFile3.mkdirs();
       }
       File tempPathFile = new File(tempPath);
        if (!tempPathFile.exists()) {
           tempPathFile.mkdirs();
       }
    }

}
如有好建议谢谢指正[/size]