JSP uploads the file to the specified location instance code

2020-06-15 10:05:08
OfStack

Servlet code:


 /**  Take the uploaded one directly File */
 public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  String targetPath = request.getRealPath(request.getContextPath()); //  Target storage path, server deployment directory 
  request.setCharacterEncoding("UTF-8");
  try {
   DefaultFileItemFactory factory = new DefaultFileItemFactory();
   DiskFileUpload up = new DiskFileUpload(factory);
   List<FileItem> ls = up.parseRequest(request);
   for (FileItem file : ls) {
    if (file.isFormField()) { //  Determines whether it is a file or text message 
     System.out.println(" Form parameter name :" + file.getFieldName()+ " , form parameter values :" + file.getString("UTF-8"));
    } else {
     if (file.getName() != null && !file.getName().equals("")) { //  Determine if the file was selected 
      File sFile = new File(file.getName());//  A temporary object is constructed in which the file is temporarily stored in the server's memory 
      File tFile = new File(targetPath, sFile.getName());
      if(tFile.exists()){
       System.out.println(" Same name file uploaded! ");
      }else{
        //FileUtils.copyFileToDirectory(sFile, tFile);// Directly copy and upload to the server, automatically generate the computer directory, directory name and the name of the uploaded file 1 to 
       FileUtils.copyFile(sFile, tFile); //  Directly copy and upload the file to the server, directly generate the target file in the specified location 
       System.out.println(" File upload successful ");
       if (tFile.isDirectory()) { //  Delete uploaded files 
        FileUtils.deleteDirectory(tFile);
       } else if (tFile.isFile()) {
        tFile.delete();
       }
       System.out.println(" File deleted successfully ");
      }
     } else {
      System.out.println(" No option to upload files! ");
     }
    }
   }
  } catch (FileUploadException e) {
   System.out.println(" File upload failed! ");
   e.printStackTrace();
  }
 }

Servlet configuration: ES7en.ES8en


<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
 xmlns="http://java.sun.com/xml/ns/javaee" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <servlet-name>MyServlet</servlet-name>
    <servlet-class>test.MyServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>MyServlet</servlet-name>
    <url-pattern>/servlet/MyServlet</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

Html page:


<body>
   <form method="post" action="servlet/MyServlet" encType="multipart/form-data" >
    <font color="blue"> Can be published directly zip file </font> <br />
           Release process file  :<input type="file" name="processDef" />
   <input type="submit"  value=" The deployment of "/>
 </form>
  </body>