JSP 上传文件

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5"

    xmlns="http://java.sun.com/xml/ns/javaee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>

  <servlet>

      <servlet-name>FileUpload</servlet-name>

      <servlet-class>servlets.FileUpload</servlet-class>

  </servlet>

  <servlet-mapping>

      <servlet-name>FileUpload</servlet-name>

      <url-pattern>/FileUpload</url-pattern>

  </servlet-mapping>

</web-app>

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

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

<html>

  <head>

    <base href="<%=basePath%>">

    <title>文件上传</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

  </head>

  <body>

    <form method="post" action="FileUpload" ENCTYPE="multipart/form-data">

        文件：<input type="file" name="file">

        <input type="submit" value="上传" name="submit">

    </form>

  </body>

</html>

package servlets;

import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Iterator;

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.FileItemFactory;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class FileUpload extends HttpServlet{

    @Override

    protected void doPost(HttpServletRequest req, HttpServletResponse resp)

            throws ServletException, IOException {

        // TODO Auto-generated method stub

        // TODO Auto-generated method stub

        boolean isMultipart = ServletFileUpload.isMultipartContent(req);

        if(isMultipart){

            FileItemFactory factory = new DiskFileItemFactory();

            ServletFileUpload upload = new ServletFileUpload(factory);

            Iterator items;

            try {

                items = upload.parseRequest(req).iterator();

                while(items.hasNext()){

                    FileItem item = (FileItem) items.next();

                    if(!item.isFormField()){

                        //取出上传文件的文件名称

                        String name = item.getName();

                        String fileName = name.substring(name.lastIndexOf("\\")+1, name.length());

                        //String path = req.getRealPath("file") + File.separatorChar + fileName;

                        String path = "D:\\" + fileName;

                        //上传文件

                        File uploadedFile = new File(path);

                        item.write(uploadedFile);

                        //打印上传成功信息

                        resp.setContentType("text/html");

                        resp.setCharacterEncoding("gb2312");

                        PrintWriter out = resp.getWriter();

                        out.print("<font size='2'>上传的文件为："+ name + "<br>");

                        out.print("保存地址为："+path+"</font>");

                    }

                }

            } catch (Exception e) {

                // TODO: handle exception

                e.printStackTrace();

            }

        }

    }

}

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