文件上传第二种方式

经过smartupload插件上传

1：下载插件并导入

右击项目àbuild pathàconfigue build pathàlibrariesàadd jarsà

 

2:java代码

public class Smart extends HttpServlet {

 

  protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

     doPost(req, resp);

  }

 

 

  protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

     //设置上传文件保存路径

         String filePath = getServletContext().getRealPath  ("/") + "images";

         File file = new File(filePath);

         if(!file.exists()){

            file.mkdir();

         }

        

         SmartUpload su = new SmartUpload();

         //初始化对象

         su.initialize(getServletConfig(), req, resp);

         //设置上传文件大小

         su.setMaxFileSize(1024*1024*10);

         //设置全部文件的大小

         su.setTotalMaxFileSize(1024*1024*100);

         //设置容许上传文件类型

         su.setAllowedFilesList("txt,jpg,gif");

         String result = "上传成功!";

         //设置禁止上传的文件类型

         try {

            su.setDeniedFilesList("rar,jsp,js");

            //上传文件

            su.upload();

            int count = su.save(filePath);

            System.out.println("上传成功" +  count + "个文件！");

         }

        

         catch (Exception e) {

            result = "上传失败！";

            e.printStackTrace();

         }

      req.setAttribute("result",result);

      req.getRequestDispatcher("up.jsp").forward(req, resp);

  }

}

2：下载

Jsp代码：（图片保存在images目录下）

<!--下载: <a href="Smartdown?filename=005.jpg">005.jpg</a>

          --> <hr>

Java代码

public class Smartdown extends HttpServlet {

 

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

     // TO Auto-generated method stub

    doPost(request, response);

  }

 

 

  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

     // TODO Auto-generated method stub

    String filename=request.getParameter("filename");

     SmartUpload su=new SmartUpload();

     su.setContentDisposition(null);

     su.initialize(getServletConfig(), request, response);

     try {

     su.downloadFile("/images/"+filename);

  } catch (SmartUploadException e) {

     // TODO Auto-generated catch block

     e.printStackTrace();

  }

  }

}