JSP文件下載

public class Download extends HttpServlet {


public Download() {
    super();
}

public void destroy() {
    super.destroy(); // Just puts "destroy" string in log
    // Put your code here
}

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

    this.doPost(request, response);
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    String path = "D:/upload/哈哈哈.txt";
    try {
        // path是指欲下載的文件的路徑。
        File file = new File(path);
        // 取得文件名。
        String filename = file.getName();
        // 取得文件的后綴名。
        String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();

        // 以流的形式下載文件。
        InputStream fis = new BufferedInputStream(new FileInputStream(path));
        byte[] buffer = new byte[fis.available()];
        fis.read(buffer);
        fis.close();
        // 清空response
        response.reset();
        // 設置response的Header
        response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes("gb2312"),"ISO8859-1"));
        response.addHeader("Content-Length", "" + file.length());
        OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
        response.setContentType("application/octet-stream");
        toClient.write(buffer);
        toClient.flush();
        toClient.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }
}

public void init() throws ServletException {
    // Put your code here
}


}</pre>