JAVA Servlet批量上传大文件

新建类 UploadServlet

[java]
package org.action;

import java.io.File;
import java.io.IOException;
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;

@SuppressWarnings("unchecked")
public class UploadServlet extends HttpServlet{

private static final long serialVersionUID = 1L ;

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

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response )
throws ServletException, IOException {
DiskFileItemFactory factory = new DiskFileItemFactory() ;
factory.setSizeThreshold( 8192 ) ;
String tempPath = request.getSession().getServletContext().getRealPath( "/")
+ "/upload" ;
File file = new File( tempPath ) ;
if(!file.isDirectory()){
file.mkdirs();
}
factory.setRepository( file ) ;
ServletFileUpload upload = new ServletFileUpload( factory ) ;

List items;
try {
items = upload.parseRequest(request);
Iterator itr = items.iterator();
while (itr.hasNext()) {// 依次处理每个 form field
FileItem item = (FileItem) itr.next();
if(!item.isFormField()){ /* 判断是否为表单控件（非File控件），如果不是表单控件，则上传此文件 */
File savedFile = new File( tempPath , item.getName() ) ;
item.write(savedFile) ;
}else{/* 如果是表单控件，则保存其值*/
System.out.println( item.getFieldName() + "-->" + item.getString() ) ;
}
}
}catch (Exception e){
e.printStackTrace() ;
}
}

}
在web.xml 中配置:

[html]

upload
org.action.UploadServlet


upload
/upload

页面代码：
[java]
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>












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