http请求文件流

public class TestFileSvt extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {


        File file = new File("C:\Users\Administrator\Desktop\aaa\test.txt");
        InputStream in = new FileInputStream(file);
        OutputStream outputStream = new BufferedOutputStream(resp.getOutputStream());
        //创建存放文件内容的数组
        byte[] buff =new byte[1024];
        //所读取的内容使用n来接收
        int n;
        //当没有读取完时,继续读取,循环
        while((n=in.read(buff))!=-1){
            //将字节数组的数据全部写入到输出流中
            outputStream.write(buff,0,n);
        }
        //强制将缓存区的数据进行输出
        outputStream.flush();
        //关流
        outputStream.close();
        in.close();
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}