Question

用户将带有txt扩展名的文件上传到我的系统。我希望此文件可以www.exp.com/text_file.txt

访问

但我不能这样做。 Project/src/main/webapp/text_file.txt，如果我将文件放在webapp下，我可以得到它。但是如何在webapp中创建txt文件？

new File(---); - ＆gt;这段代码不是我想要的。它在eclipse文件夹下创建。

Project
       ->pom.xml
       ->src
            ->main
                  ->java
                  ->resources
                  ->webapp
                          ->WEB-INF

Answer 1

假设您正在使用servlet，此代码应该可以运行（让文件放入webapp / resources）

public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException {

      // Getting ServletContext from request
      ServletContext ctx= req.getServletContext();
      // Get the absolute path of the file
      String filename = ctx.getRealPath("resources/file.text");
      // getting mimeType of the file
      String mime = ctx.getMimeType(filename);
      // Error handling
      if (mime == null) {
        res.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        return;
      }

      // Setting MIME content type
      res.setContentType(mime);
      // Getting file object
      File file = new File(filename);
      // Setting content length header
      res.setContentLength((int)file.length());

       // FileInputStream to read from file
      FileInputStream in = new FileInputStream(file);
      // Obtain OutputStream from response object
      OutputStream out = res.getOutputStream();

      // Writing to the OutputStream
       byte[] buffer = new byte[1024];
       int bytes = 0;
       //  we stop when in.read returns -1 and read untill it does not
       while ((bytes = in.read(buffer)) >= 0) {
         out.write(buffer, 0, count);
      }
    // Clean up, closing resources
    out.close();
    in.close();

}

将文件上传到webapp文件夹

1 个答案: