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;
}
}