Servlet: 下载文件

DownloadServlet.java

/* 省略了package和import */
 
@WebServlet("/download")
public class DownloadServlet extends HttpServlet
{
    protected void service(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException
	{
		// 获取文件路径
		String filePath = "/files/music/宁夏.mp3";
		String realFilePath = this.getServletContext().getRealPath(filePath);
 
		// 获取输入流
		InputStream in = new BufferedInputStream(new FileInputStream(
		        realFilePath));
 
		// 获取输出流
		ServletOutputStream out = response.getOutputStream();
 
		// 设置文件类型
		response.setContentType("audio/mpeg");
 
		// 设置浏览器处理文件的方式：attachment---保存文件；inline---在浏览器中在线打开。
		response.setHeader("Content-Disposition", "inline;filename=" + "a.mp3");
 
		// 缓冲区
		byte[] buf = new byte[1024];
 
		// 将从文件输入流获取的字节数据，写到响应的输出流
		while(-1 != in.read(buf)) 
		{
			out.write(buf);
		}
		
		// 关闭输入输出流
		in.close();
		out.close();
	}
}