Como fazer upload de arquivos na pasta do servidor usando jsp [duplicate]

Question

Oct 22, 2013, 08:34 AM

Como fazer upload de arquivos na pasta do servidor usando jsp [duplicate]

Esta questão já tem uma resposta aqui:

Modo recomendado para salvar arquivos enviados em um aplicativo de servlet 2 respostas

Eu estou tentando fazer upload de algumas imagens na pasta que localiza no meu servidor usando servlet / jsp.

Abaixo está meu código, que está trabalhando na minha máquina local:

 import java.io.*;
 import java.util.*;

 import javax.servlet.ServletConfig;
 import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;

   import org.apache.commons.fileupload.FileItem;
    import org.apache.commons.fileupload.FileUploadException;
   import org.apache.commons.fileupload.disk.DiskFileItemFactory;
   import org.apache.commons.fileupload.servlet.ServletFileUpload;
     import org.apache.commons.io.output.*;

      public class UploadServlet extends HttpServlet {

  private boolean isMultipart;
   private String filePath;
  private int maxFileSize = 1000 * 1024;
   private int maxMemSize = 1000 * 1024;
   private File file ;

    public void init( ){
  // Get the file location where it would be stored.
  filePath = 
         getServletContext().getInitParameter("file-upload"); 
   }
    public void doPost(HttpServletRequest request, 
           HttpServletResponse response)
          throws ServletException, java.io.IOException {
  // Check that we have a file upload request
     isMultipart = ServletFileUpload.isMultipartContent(request);
     response.setContentType("text/html");
     java.io.PrintWriter out = response.getWriter( );
      if( !isMultipart ){
     out.println("<html>");
     out.println("<head>");
     out.println("<title>Servlet upload</title>");  
     out.println("</head>");
     out.println("<body>");
     out.println("<p>No file uploaded</p>"); 
     out.println("</body>");
     out.println("</html>");
     return;
     }
     DiskFileItemFactory factory = new DiskFileItemFactory();
  // maximum size that will be stored in memory
     factory.setSizeThreshold(maxMemSize);
  // Location to save data that is larger than maxMemSize.
     factory.setRepository(new File(" C:/Users/puneet verma/Downloads/"));  

  // Create a new file upload handler
      ServletFileUpload upload = new ServletFileUpload(factory);
  // maximum file size to be uploaded.
     upload.setSizeMax( maxFileSize );

     try{ 
  // Parse the request to get file items.
     List fileItems = upload.parseRequest(request);

  // Process the uploaded file items
      Iterator i = fileItems.iterator();

     out.println("<html>");
     out.println("<head>");
     out.println("<title>Servlet upload</title>");  
     out.println("</head>");
     out.println("<body>");
     while ( i.hasNext () ) 
     {
       FileItem fi = (FileItem)i.next();
     if ( !fi.isFormField () )  
     {
        // Get the uploaded file parameters
        String fieldName = fi.getFieldName();
        String fileName = fi.getName();
        String contentType = fi.getContentType();
        boolean isInMemory = fi.isInMemory();
        long sizeInBytes = fi.getSize();
        // Write the file
        if( fileName.lastIndexOf("\\") >= 0 ){
           file = new File( filePath + 
           fileName.substring( fileName.lastIndexOf("\\"))) ;
        }else{
           file = new File( filePath + 
           fileName.substring(fileName.lastIndexOf("\\")+1)) ;
        }
        fi.write( file ) ;
        out.println("Uploaded Filename: " + fileName + "<br>");
     }
      }
     out.println("</body>");
          out.println("</html>");
     }catch(Exception ex) {
     System.out.println(ex);
     }
       }
           public void doGet(HttpServletRequest request, 
                   HttpServletResponse response)
          throws ServletException, java.io.IOException {

           throw new ServletException("GET method used with " +
            getClass( ).getName( )+": POST method required.");
           } 
            }

Agora meu código jsp, onde eu carrego o arquivo:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"   "http://www.w3.org/TR/html4/loose.dtd">
   <html>
  <head>
      <title>File Uploading Form</title>
     </head>
       <body>
        <h3>File Upload:</h3>
      Select a file to upload: <br />
       <form action="UploadServlet" method="post"
                    enctype="multipart/form-data">
      <input type="file" name="file" size="50" />
       <br />
    <input type="submit" value="Upload File" />
       </form>
      </body>
        </html>

No meu arquivo web.xml, incluímos o caminho como este:

      <context-param>
<description>Location to store uploaded file</description>
<param-name>file-upload</param-name>
<param-value>
    C:\Users\puneet verma\Downloads\
 </param-value>
     </context-param>

Eu usei o caminho do meu servidorhttp://grand-shopping.com/<"alguma pasta">, mas não está funcionando aqui.

Bibliotecas que estou usando são:

commons-fileupload-1.3.jarcommons-io-2.2.jar

Alguém pode me sugerir, exatamente como eu preciso definir o caminho do meu servidor, a fim de fazer upload de imagens com sucesso.