java Upload and download

/**

* Upload comoms-fileupload

*/

        DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();



        ServletFileUpload sfu = new ServletFileUpload(diskFileItemFactory);

        

        List<FileItem> fileItemList = null;

        try {

            fileItemList = sfu.parseRequest(request);

        } catch (FileUploadException e) {

            e.printStackTrace();

        }

        FileItem fi0 = fileItemList.get(0);

        FileItem fi1 = fileItemList.get(1);

        

        response.getWriter().println(fi0.getFieldName() + ":" + fi0.getString());

        response.getWriter().println(fi1.getName() + ":" + fi1.getSize());

        try {

            fi1.write(new File("c:/haha.jpg"));

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        



/**

* Download

* 两个头一个流

*/

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        String filename = "D:/Download/the first time.rmvb";

        String ext = filename.substring(filename.lastIndexOf("."));

        String disposition = "attachment;filename="+UUID.randomUUID()+ext;

        String mineType = this.getServletContext().getMimeType(filename);

        FileInputStream fis = new FileInputStream(filename);

        response.setHeader("Content-Type", mineType);

        response.setHeader("Content-Disposition", disposition);

        ServletOutputStream output = response.getOutputStream();

        IOUtils.copy(fis, output);

        fis.close();

    }

 

/**

* download中文文件名字乱码问题

*/

package cn.itcast.down.utils;



import java.io.IOException;

import java.io.UnsupportedEncodingException;

import java.net.URLEncoder;



import javax.servlet.http.HttpServletRequest;



import sun.misc.BASE64Encoder;



public class DownUtils {

    public static String filenameEncoding(String filename, HttpServletRequest request) throws IOException {

        String agent = request.getHeader("User-Agent"); //获取浏览器

        if (agent.contains("Firefox")) {

            BASE64Encoder base64Encoder = new BASE64Encoder();

            filename = "=?utf-8?B?"

                    + base64Encoder.encode(filename.getBytes("utf-8"))

                    + "?=";

        } else if(agent.contains("MSIE")) {

            filename = URLEncoder.encode(filename, "utf-8");

        } else {

            filename = URLEncoder.encode(filename, "utf-8");

        }

        return filename;

    }

}