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发送MP3文件

 2007-12-23 12:35:52 来源:WEB开发网   
核心提示:import java.io.BufferedInputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import javax.servlet.ServletException;import ja
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Sendmp3 extends HttpServlet {

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

  String fileName = (String) request.getParameter("file");
  if (fileName == null  fileName.equals(""))
   throw new ServletException(
     "Invalid or non-existent file parameter in SendMp3 servlet.");

   if (fileName.indexOf(".mp3") == -1)
   fileName = fileName + ".mp3";

  String mp3Dir = getServletContext().getInitParameter("mp3-dir");
  if (mp3Dir == null  mp3Dir.equals(""))
   throw new ServletException(
     "Invalid or non-existent mp3Dir context-param.");

  ServletOutputStream stream = null;
  BufferedInputStream buf = null;
  try {

   stream = response.getOutputStream();
   File mp3 = new File(mp3Dir + "/" + fileName);

   //set response headers
   response.setContentType("audio/mpeg");

   response.addHeader("Content-Disposition", "attachment; filename="
     + fileName);

   response.setContentLength((int) mp3.length());

   FileInputStream input = new FileInputStream(mp3);
   buf = new BufferedInputStream(input);
   int readBytes = 0;
   //read from the file; write to the ServletOutputStream
   while ((readBytes = buf.read()) != -1)
    stream.write(readBytes);
  } catch (IOException ioe) {
   throw new ServletException(ioe.getMessage());
  } finally {
   if (stream != null)
    stream.close();
   if (buf != null)
    buf.close();
  }
 }

 public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {

  doGet(request, response);
 }
}

(出处:http://www.cncms.com)


Tags:发送 MP 文件

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