conflict between upload file code and insert query in DB

Posted on 2007-11-21
Last Modified: 2013-11-24
What i tried to do is to creae jsp page that enable the user to fill a form and upload file
THEN : the filled field will be insert to the sql database, and the upload file will be store in a folder(out side of DB) but the name of the uploaded file will be inserted to one of the DB column

What happen ?? the insertion code is (WROK GOOD ALONE) and the upload file code is (WROK GOOD ALONE)
WHEN I JOINED THE TWO CODES --> ONLY the upload file is happen and no insertion to DB happen ????

This is the code (addsoftware.jsp)  : where is the problem
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%@ page import="java.sql.*,*,java.util.*,org.apache.*,,java.lang.*"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
    <%@ page language="java" import="javazoom.upload.*,java.util.*" %>
<%@ page errorPage="ExceptionHandler.jsp" %>
<jsp:useBean id="upBean" scope="page" class="javazoom.upload.UploadBean" >
  <jsp:setProperty name="upBean" property="folderstore" value="c:/uploads" />
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
        // database quiere to insert fields in the database  
           Connection conn=DriverManager.getConnection("jdbc:odbc:NN_project","sa","nnproject");
          String str=request.getParameter("uploadfile");
          // out.print(str);
          File f= new File(str);
          str= f.getName();
          String sname=request.getParameter("softname");
          //File f=new File(str);
         String nn_model=request.getParameter("nn_model");
          String descr=request.getParameter("descr");
          String nn_type=request.getParameter("nn_type_1");
          String new_net_type=request.getParameter("new_net_type");
          String input=request.getParameter("input");
          String output=request.getParameter("output");
          String hidden=request.getParameter("hidden");
          String Func=request.getParameter("func");
          PreparedStatement stmt = conn.prepareStatement(
                  "INSERT INTO soft_temp (software_name,software_file_name,descr,input_neuron,output_neuron,hidden_neuron,new_type,nn_model,nn_type,activiation_function) VALUES (?,?,?,?,?,?,?,?,?,?)");
         // stmt.setString(3,nn_model);
         // stmt.setString(4,nn_type);
          } catch (Exception ex) {
           //// the code used to save the uploadfile  in a folder
         if (MultipartFormDataRequest.isMultipartFormData(request))
          // Uses MultipartFormDataRequest to parse the HTTP request.
          MultipartFormDataRequest mrequest = new MultipartFormDataRequest(request);
          String todo = null;
          if (mrequest != null) todo = mrequest.getParameter("todo");
          if ( (todo != null) && (todo.equalsIgnoreCase("upload")) )
          Hashtable files = mrequest.getFiles();
          if ( (files != null) && (!files.isEmpty()) )
          UploadFile file = (UploadFile) files.get("uploadfile");
          if (file != null) out.println("<li>Form field : uploadfile"+"<BR> Uploaded file : "+file.getFileName()+" ("+file.getFileSize()+" bytes)"+"<BR> Content Type : "+file.getContentType());
          // Uses the bean now to store specified by jsp:setProperty at the top.
, "uploadfile");
          out.println("<li>No uploaded files");
          else out.println("<BR> todo="+todo);
          out.println("You will receive the acceptance within three days");
         ///////////// The Form //////////////////
    <h1>Add Software</h1>
        <form method="post" action="addsoftware.jsp" name="upform" enctype="multipart/form-data">
            <h2> Software name :</h2> 
        <input type="text" name="softname" value="" />
        <h2> Describtion:</h2>
        <input type="text" name="descr" value="" />
        <h2>Net Model:</h2>
        <input type="radio" name="nn_model" value="FeedForward" />FeedForward
        <input type="radio" name="nn_model" value="Recurrent" />Recurrent
     <h2>Net Type:</h2>   
<select name="nn_type_1">  
Connection conn = DriverManager.getConnection(
int i=0;
String[] ar;
String ff="ff";
String ffdb=null;
Statement stmt = conn.createStatement();
String sql = "SELECT NN_type_name FROM NN_type  ";
ResultSet rs = stmt.executeQuery(sql);
    <%= rs.getString("NN_type_name")%>
    } catch (Exception ex) {
        <br>If the net type you wants does not exist please enter the new net type: <br>
       <h2> New net type :</h2>
        <input type="text" name="new_net_type" value="" />
                <br>Input Neuron: <input type="text" name="input" value="" />
            <br>Hidden Neuron: <input type="text" name="hidden" value="" /></h2> if there is more than layer, please seperate the number of neuron in each layer by ";" 
            <br>Output Neuron:  <input type="text" name="output" value="" />
        <h2> Activation Function:  </h2> 
        <select name="func">
              <option>Identity Function</option>
              <option>Binary Function</option>
              <option>Sigmoid Function</option>
          <h2> Upload software:</h2>
       <input type="file" name="uploadfile" size="50">
       <input type="hidden" name="todo" value="upload">
        <input type="submit" value="submit" name="submit" />
        <input type="reset" value="reset" name="reset" />
    This example uses JSTL, uncomment the taglib directive above.
    To test, display the page like this: index.jsp?sayHello=true&name=Murphy
    <c:if test="${param.sayHello}">
        <!-- Let's welcome the user ${} -->
        Hello ${}!

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Question by:master_programmer
  • 2
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LVL 10

Expert Comment

ID: 20327577
What I would do to debug this...
See what the value of 'str' is (exactly).   Write some test code and copy the value of 'str' as a hardcoded value and try and insert it into the table along with some dummy values for the other fields if they are not NULL.   Do the test insert using T-SQL in order to test outside of java.    

LVL 25

Expert Comment

by:Tomas Helgi Johannsson
ID: 20333407

What I can see from your code is that both of the code-fragments you say working independently
should also work as joined however I don't see how you can make 100% sure that the
request.getParameter("softname") matches the filename which you store in the variable str in line 34.
It may be that the record is in the database while there is no matching link between softname and the actual
file name.

  Tomas Helgi

Author Comment

ID: 20333788
Actually there is no relation between filename (str) and softname field
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Author Comment

ID: 20333824
I did a very simple "insert query operation" that is independent from the upload operation and it is also not work with the upload code, I doubted from the header of the form :
<form method="post" action="addsoftware.jsp" name="upform" enctype="multipart/form-data">
when i delete the statment (enctype="multipart/form-data") the insertion work, but upload not??

I am also doubted from  the statment:
<jsp:useBean id="upBean" scope="page" class="javazoom.upload.UploadBean" >
  <jsp:setProperty name="upBean" property="folderstore" value="c:/uploads" />
specially from (scope="page") what it did mean ??
LVL 10

Expert Comment

ID: 20333833
The point is, if the insert into the db table is failing, extract the exact string value that is being returned in the code and then create a T-SQL INSERT statement to replicate the insert statement in your code sample.   Run the code in Query Analyser/Management Studio.    Does it fail?  

I must admit, I'm not 100% sure I understand the problem but I have to interpret it as 'the java code handles the file upload ok but when it tries to insert into a db table, it fails'.   Is that right?  If so, what I have suggested is a good place to start.

LVL 25

Accepted Solution

Tomas Helgi Johannsson earned 500 total points
ID: 20333854
Have you checked out the log files of the server you are running the jsp page on ?
I am curious what the ex.printStackTrace() is showing.

You can also add the followin lines
in stead of just ex.printStackTrace() where you catch Exceptions.
That way any exeptions are printed directly to the webpage to debug.

   Tomas Helgi

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