Servlet 中的文件读取问题 舅舅孩子吧

Question

上图是目录结构

我想用DownloadServlet 来读取 count.properties

代码如下

@Override
    public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        InputStream in;
        OutputStream out;
        String fileName = "/resources/count.properties";
        out = resp.getOutputStream();
        in = getServletContext().getResourceAsStream(fileName);
        int length = in.available();   //在这行出现空指针报错
        byte[] bytes = new byte[512];
        int readBuffer;
        resp.setContentType("application/force-download");
        resp.addHeader("Content-Disposition","attachment;filename=\""+fileName+"\"");
        resp.addHeader("Content-length",String.valueOf(length));
        while((readBuffer = in.read(bytes))!=-1)
        {
            out.write(bytes,0,readBuffer);
        }
        in.close();
        out.close();
    }

servlet 中的路径问题怎么这么难搞啊 舅舅孩子吧

Answer 1

/WEB-INF/classes/resources/count.properties