Wednesday, April 3, 2013

How to upload file in JSP

index.jsp



<HTML>
<HEAD>
<TITLE>Display file upload form to the user</TITLE>
</HEAD>
<BODY>
<FORM ENCTYPE="multipart/form-data" ACTION="upload.jsp" METHOD=POST>
<br>
<br>
<br>
<center>
<table border="0" bgcolor=#ccFDDEE>
      <tr>
            <center>
            <td colspan="2" align="center"><B>UPLOAD THE FILE</B>
            <center>
            </td>
      </tr>
      <tr>
            <td colspan="2" align="center"></td>
      </tr>
      <tr>
            <td><b>Choose the file To Upload:</b></td>
            <td><INPUT NAME="file" TYPE="file"></td>
      </tr>
      <tr>
            <td colspan="2" align="center"></td>
      </tr>
      <tr>
            <td colspan="2" align="center"><input type="submit"
                  value="Send File"></td>
      </tr>
      <table>
            </center>
            </FORM>
</BODY>
</HTML>


upload.jsp




<%@ page import="java.io.*"%>
<%
      String saveFile = "";
      String contentType = request.getContentType();
      if ((contentType != null) && (contentType.indexOf("multipart/form-data") >= 0)) {
            DataInputStream in = new DataInputStream(request.getInputStream());
            int formDataLength = request.getContentLength();
            byte dataBytes[] = new byte[formDataLength];
            int byteRead = 0;
            int totalBytesRead = 0;
            while (totalBytesRead < formDataLength) {
                  byteRead = in.read(dataBytes, totalBytesRead, formDataLength);
                  totalBytesRead += byteRead;
            }
            String file = new String(dataBytes);
            saveFile = file.substring(file.indexOf("filename=\"") + 10);
            saveFile = saveFile.substring(0, saveFile.indexOf("\n"));
            saveFile = saveFile.substring(saveFile.lastIndexOf("\\") + 1, saveFile.indexOf("\""));
            int lastIndex = contentType.lastIndexOf("=");
            String boundary = contentType.substring(lastIndex + 1, contentType.length());
            int pos;
            pos = file.indexOf("filename=\"");
            pos = file.indexOf("\n", pos) + 1;
            pos = file.indexOf("\n", pos) + 1;
            pos = file.indexOf("\n", pos) + 1;
            int boundaryLocation = file.indexOf(boundary, pos) - 4;
            int startPos = ((file.substring(0, pos)).getBytes()).length;
            int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length;
            saveFile = "C:/himanshu/" + saveFile;
            File ff = new File(saveFile);
            FileOutputStream fileOut = new FileOutputStream(ff);
            fileOut.write(dataBytes, startPos, (endPos - startPos));
            fileOut.flush();
            fileOut.close();
%><Br>
<table border="2">
      <tr>
            <td><b>You have successfully upload the file by the name of:</b>
            <%
                  out.println(saveFile);
                  }
            %>
            </td>
      </tr>
</table>





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2 comments:

  1. Thank you very much!!

    ReplyDelete
  2. The main motive of the Hadoop consulting services is to spread the knowledge so that they can give more big data engineers to the world.

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