我想从链接下载文件

Question

我有一个servlet，它正在从指定位置下载文件。 目前，我的网址是http://localhost:8080/DownloadFromservlet/download?file=c://tmp/DownloadFileServlet.pdf 它应该像：http://localhost:8080/fileserver/download?file=c:/tmp/DownloadFileServlet.pdf

我需要用文件服务器替换DownloadFromservlet。这是我的代码

@WebServlet("/download")
public class download extends HttpServlet {
  private static final long serialVersionUID = 1L;


  protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    String sourceFile = request.getParameter("file");
    sourceFile = sourceFile != null ? sourceFile.trim() : "";
    File fo = null;

    if (sourceFile.length() > 0)

        fo = new File(sourceFile);

    response.setContentType("application/octet-stream");
    ServletOutputStream servletOutputStream = response.getOutputStream();
    BufferedInputStream bufferedInoutStream = new BufferedInputStream(new FileInputStream(fo));
    byte[] buffer = new byte[8192];
    int bytesRead = 0;
    // ;
    while (bytesRead != -1) {
        bytesRead = bufferedInoutStream.read(buffer);
        servletOutputStream.write(buffer);
    }
    servletOutputStream.flush();

    if (servletOutputStream != null) {
        try {
            servletOutputStream.close();
        } catch (Throwable tx) {
        }
    }

    if (bufferedInoutStream != null) {
        try {
            bufferedInoutStream.close();
        } catch (Throwable tx) {
        }
    }
  }

}

您能帮我如何更改它吗？