java Upload and download

標籤：

/*** 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* 兩個頭一個流*/    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中文檔案名稱字亂碼問題*/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"); //擷取瀏覽器        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;    }}

 

java Upload and download