导入包:

commons-fileupload-1.3.1.jar

commons-io-2.4.jar

commons-fileupload依赖于commons-io,commons-io-2.4必须是JDK6+;

下载地址:

http://commons.apache.org/proper/commons-fileupload/download_fileupload.cgi

http://commons.apache.org/proper/commons-io/download_io.cgi

index.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<!DOCTYPE html>

<html>

    <head>

        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

        <title>JSP Page</title>

    </head>

    <body>

        <h1>Hello World!</h1>

        <form name="myform" action="FileUploadTestServlet" method="post" enctype="multipart/form-data">

            姓名: <br>

            <input type="text" name="name" size="15"><br>

            附件1:<br>

            <input type="file" name="myfile1"><br>

            附件2:<br>

            <input type="file" name="myfile2"><br>

            <br>

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

        </form>

    </body>

</html>
FileUploadTestServlet.java
import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Iterator;

import java.util.List;

import java.util.logging.Level;

import java.util.logging.Logger;

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.FileUploadException;

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

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

/**

 *

 * @author y

 */

public class FileUploadTestServlet extends HttpServlet {

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        response.setContentType("text/html;charset=UTF-8");

        PrintWriter out = response.getWriter();

        if(!ServletFileUpload.isMultipartContent(request)){

            return;

        }

        FileItemFactory fileFactory = new DiskFileItemFactory();

        ServletFileUpload fileUpload = new ServletFileUpload(fileFactory);

        try {

            List items = fileUpload.parseRequest(request);

            Iterator iter = items.iterator();

            while(iter.hasNext()){

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

                if(item.isFormField()){

                    out.print("<p>"+item.getFieldName()+":"+new String(item.getString().getBytes("ISO8859-1"), "utf-8")+"</p>");

                }else{

                    String path = "/home/y/my_temp/upload"+File.separator+item.getName();

                    File disk = new File(path);

                    item.write(disk);

                    out.print("<p>文件保存到:"+path+"</p>");

                }

            }

        } catch (FileUploadException ex) {

            Logger.getLogger(FileUploadTestServlet.class.getName()).log(Level.SEVERE, null, ex);

        } catch (Exception ex) {

            Logger.getLogger(FileUploadTestServlet.class.getName()).log(Level.SEVERE, null, ex);

        }finally{

            out.close();

        }

    }

    @Override

    protected void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        processRequest(request, response);

    }

    @Override

    protected void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        processRequest(request, response);

    }

}

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