import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.text.DateFormat;
public class MyServlet 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);
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;
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();
}
} //end doGet
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request,response);
}
}
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
<servlet><servlet-name>MyServletName</servlet-name>
<servlet-class>MyServlet</servlet-class>
</servlet>
<servlet-mapping><servlet-name>MyServletName</servlet-name>
<url-pattern>/index.html</url-pattern>
</servlet-mapping>
</web-app>
Download: ServletSendMP3.zip( 89 k)