File Upload in J2EE.

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  • dmjpro
    Top Contributor
    • Jan 2007
    • 2476
    #1

    File Upload in J2EE.

    Have a look at my HTML Code and my Java code.
    I m trying to see the total contents when a form is submitted with enctype=multipa rt/form-data.

    [code=html]
    <html>
    <head>
    <title>Simple File Upload Test</title>
    </head>
    <body>
    <form name = "test_form" method ="POST" enctype="multip art/form-data" action = "../jsp/FileUpload.jsp" >
    <input type="file">
    <input type="submit">
    </form>
    </body>
    </html>
    [/code]

    [code=java]
    ServletInputStr eam in = request.getInpu tStream();
    //Here request is the reference of HttpServletRequ est.
    byte b[] = new byte[255];
    int len;
    while((len = in.read(b))!=-1) out.print(new String(b,0,len) );
    [/code]

    My O/P is showing something like this........... ...!
    Code:
    -----------------------------5238189273319--
    Can't I get the total Content sent by the Browser?

    Please help.

    Kind regards,
    Dmjpro.
    Tags: None
    • dmjpro
      Top Contributor
      • Jan 2007
      • 2476
      #2
      Originally posted by dmjpro
      Have a look at my HTML Code and my Java code.
      I m trying to see the total contents when a form is submitted with enctype=multipa rt/form-data.

      [code=html]
      <html>
      <head>
      <title>Simple File Upload Test</title>
      </head>
      <body>
      <form name = "test_form" method ="POST" enctype="multip art/form-data" action = "../jsp/FileUpload.jsp" >
      <input type="file">
      <input type="submit">
      </form>
      </body>
      </html>
      [/code]

      [code=java]
      ServletInputStr eam in = request.getInpu tStream();
      //Here request is the reference of HttpServletRequ est.
      byte b[] = new byte[255];
      int len;
      while((len = in.read(b))!=-1) out.print(new String(b,0,len) );
      [/code]

      My O/P is showing something like this........... ...!
      Code:
      -----------------------------5238189273319--
      Can't I get the total Content sent by the Browser?

      Please help.

      Kind regards,
      Dmjpro.
      Somebody please help!

      Kind regards,
      Dmjpro.

        Comment

        • madhoriya22
          Contributor
          • Jul 2007
          • 251
          #3
          Originally posted by dmjpro
          Somebody please help!

          Kind regards,
          Dmjpro.
          Hi,
          I output is printing the boundary value.

          Are you sure by doing this you are getting the file from the client. How you are binding that file into servletinputStr eam.

            Comment

            • dmjpro
              Top Contributor
              • Jan 2007
              • 2476
              #4
              Originally posted by madhoriya22
              Hi,
              I output is printing the boundary value.

              Are you sure by doing this you are getting the file from the client. How you are binding that file into servletinputStr eam.
              Thanks to share your knowledges with me.
              Nice to see this.
              First of all tell me what is Boundary?
              When I do enctype=multipa rt/form-data in a form Tag then in which format the data comes into the server?
              And where should I do binding the file into ServletInputStr eam?

              Kind regards,
              Dmjpro.

                Comment

                • madhoriya22
                  Contributor
                  • Jul 2007
                  • 251
                  #5
                  Originally posted by dmjpro
                  Thanks to share your knowledges with me.
                  Nice to see this.
                  First of all tell me what is Boundary?
                  When I do enctype=multipa rt/form-data in a form Tag then in which format the data comes into the server?
                  And where should I do binding the file into ServletInputStr eam?

                  Kind regards,
                  Dmjpro.
                  Hi,
                  I think you should use O'reilly's MultipartReques t api to upload the file. what you need to do is ........ download the jar file from here http://www.servlets.com/cos/ Here you find the api for file upload and by a little searching you find jar also. You can use apache's JCommon for file download also.

                  Boundary is a value which is attached with headers while sending file from client(I think so).

                  When you do enctype=multipa rt/form-data your data comes in multipart format but for that your html page should support RFC encoding.
                  Binding of file should be done on server side. But I really dont know how you should do that. But if you vil use MultipartReques t api it vill not be required. Google for MultipartReques t or file upload using MultipartReques t you vil get a lot of results.

                    Comment

                    • dmjpro
                      Top Contributor
                      • Jan 2007
                      • 2476
                      #6
                      Originally posted by madhoriya22
                      Hi,
                      I think you should use O'reilly's MultipartReques t api to upload the file. what you need to do is ........ download the jar file from here http://www.servlets.com/cos/ Here you find the api for file upload and by a little searching you find jar also. You can use apache's JCommon for file download also.

                      Boundary is a value which is attached with headers while sending file from client(I think so).

                      When you do enctype=multipa rt/form-data your data comes in multipart format but for that your html page should support RFC encoding.
                      Binding of file should be done on server side. But I really dont know how you should do that. But if you vil use MultipartReques t api it vill not be required. Google for MultipartReques t or file upload using MultipartReques t you vil get a lot of results.

                      Thanks a lot for your kind information.

                      Kind regards,
                      Dmjpro.

                        Comment

                        • madhoriya22
                          Contributor
                          • Jul 2007
                          • 251
                          #7
                          Originally posted by dmjpro
                          Thanks a lot for your kind information.

                          Kind regards,
                          Dmjpro.
                          Hi,
                          Binding of file should be done at client side not at server side. Sorry :(

                            Comment

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