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Whre to put <a href ...>

Posted on 2003-10-22
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Last Modified: 2010-04-01

This is jsp code for vol2.jsp

<%@ page import="java.sql.*, com.dhal.*"%>
 
<jsp:useBean id="vol" class="com.dhal.volun" scope="session"/>
<jsp:setProperty name="vol" property="*"/>

<Html>
<body>
<form action="vol.jsp...>
......
<% database queries.....%>
<input type="submit" value="Update">

</form>

When the user presses the update, it needs to go to vol.jsp
where do i put
<a href= ?   >so that it would go to vol.jsp



0
Comment
Question by:Jasbir21
  • 8
  • 8
16 Comments
 
LVL 35

Accepted Solution

by:
TimYates earned 100 total points
Comment Utility
You don't...

<form action="vol.jsp">
<% database queries.....%>
<input type="submit" value="Update">
</form>

Will post this form to vol.jsp
0
 

Author Comment

by:Jasbir21
Comment Utility
The vol2.jsp code:
<%@ page import="java.sql.*, com.dhal.*"%>
 
<jsp:useBean id="vol" class="com.dhal.volun" scope="session"/>
<jsp:setProperty name="vol" property="*"/>

<Html>
<body>

<%
String connectionURL = "jdbc:mysql://localhost:3306/mydatabase?user=;password=";
Connection connection = null;
ResultSet rs=null;
ResultSet rs1=null;
Statement statement=null;
String username=null;
String passwd=null;
String verify=null;
String name=null;
String education=null;
String city=null;
String state=null;
String post=null;
String qualify=null;
String house1=null;
String house2=null;
String office1=null;
String office2=null;
String mobile1=null;
String mobile2=null;
String email=null;
String notify=null;
String add1=null;
String add2=null;

Statement statement1=null;

try
{

Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "", "");
statement=connection.createStatement();
String myquery="select * from accou where username='jasbir22'";
rs=statement.executeQuery(myquery);

boolean anyRecords=rs.next();

String query="select * from my where username='jasbir22'";
statement1=connection.createStatement();
rs1=statement1.executeQuery(query);
boolean any=rs1.next();

if(rs1.getString(1).trim().equals(rs.getString(1).trim()))
{

name=rs1.getString(2).trim();
education=rs1.getString(3).trim();
city=rs1.getString(4).trim();
state=rs1.getString(5).trim();
post=rs1.getString(6).trim();
qualify=rs1.getString(7).trim();
house1=rs1.getString(8).trim();
house2=rs1.getString(9).trim();
office1=rs1.getString(10).trim();
office2=rs1.getString(11).trim();
mobile1=rs1.getString(12).trim();
mobile2=rs1.getString(13).trim();
email=rs1.getString(14).trim();
notify=rs1.getString(15).trim();
add1=rs1.getString(16).trim();
add2=rs1.getString(17).trim();


username=rs.getString(1).trim();
passwd=rs.getString(2).trim();
verify=rs.getString(3).trim();


}



}
catch(SQLException ex )
{
   ex.printStackTrace() ;
}
catch( ClassNotFoundException ex )
{
   ex.printStackTrace() ;
}
finally
{
  try { if( rs != null ) rs.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
 //  try { if( prep1 != null ) prep1.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
try { if( rs1 != null ) rs1.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
   try { if( connection != null ) connection.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
}

%>

<%
//String connectionURL = "jdbc:mysql://localhost:3306/mydatabase?user=;password=";
//Connection connection = null;
PreparedStatement prep1=null;

try
{
passwd=vol.getPasswd();
verify=vol.getVerifypwd();
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "", "");


String y="update accou set " +"password='"+passwd+"'," + "verifypassdword='" +verify+"' " +
"where username='"+username+"'";

prep1=connection.prepareStatement(y);
prep1.executeUpdate();

S
}

catch(SQLException ex )
{
   ex.printStackTrace() ;
}
catch( ClassNotFoundException ex )
{
   ex.printStackTrace() ;
}
finally
{
  //try { if( rs != null ) rs.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
   try { if( prep1 != null ) prep1.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
//try { if( rs1 != null ) rs1.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
   try { if( connection != null ) connection.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
}

%>
<table border="4" BGColor="#FFF8DC" width="100%">
<tr>
<td>
<Font Color="#000000" Face="Garamond" Size="4">
<b>ACCOUNT INFORMATION</b>
</Font>
</td>
</tr>
</table>
<br>
<form action="vol2.jsp" method="post">
<Font Size="4 Color="Black" Face="Garamond" Align="Center">



<br>
Username :

<input type="text" name="username" value=<%=username%> size=20 /><br>

Password :
<input type="password" name="passwd" value=<%=passwd%> size=20/><br>


Verify Password :
<input type="password" name="verifypwd" value=<%=verify%> size=20/> <br>


<input type="submit" value="Submit">

</form>
</Font>



</body>

<html>




The vol.jsp<%@ page import="java.sql.*"%>
<Html>
<body>

<%
String connectionURL = "jdbc:mysql://localhost:3306/mydatabase?user=;password=";
Connection connection = null;

PreparedStatement prep1;
prep1=null;
ResultSet rs=null;
ResultSet rs1=null;
Statement statement=null;
String username=null;
String passwd=null;
String verify=null;
String name=null;
String education=null;
String city=null;
String state=null;
String post=null;
String qualify=null;
String house1=null;
String house2=null;
String office1=null;
String office2=null;
String mobile1=null;
String mobile2=null;
String email=null;
String notify=null;
String add1=null;
String add2=null;

Statement statement1=null;

try
{

Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "", "");
statement=connection.createStatement();
String myquery="select * from accou where username='jasbir22'";
rs=statement.executeQuery(myquery);

boolean anyRecords=rs.next();

String query="select * from my where username='jasbir22'";
statement1=connection.createStatement();
rs1=statement1.executeQuery(query);
boolean any=rs1.next();

if(rs1.getString(1).trim().equals(rs.getString(1).trim()))
{
name=rs1.getString(2).trim();
education=rs1.getString(3).trim();
city=rs1.getString(4).trim();
state=rs1.getString(5).trim();
post=rs1.getString(6).trim();
qualify=rs1.getString(7).trim();
house1=rs1.getString(8).trim();
house2=rs1.getString(9).trim();
office1=rs1.getString(10).trim();
office2=rs1.getString(11).trim();
mobile1=rs1.getString(12).trim();
mobile2=rs1.getString(13).trim();
email=rs1.getString(14).trim();
notify=rs1.getString(15).trim();
add1=rs1.getString(16).trim();
add2=rs1.getString(17).trim();


username=rs.getString(1).trim();

passwd=rs.getString(2).trim();
System.out.println(passwd);
verify=rs.getString(3).trim();


}



}
catch(SQLException ex )
{
   ex.printStackTrace() ;
}
catch( ClassNotFoundException ex )
{
   ex.printStackTrace() ;
}
finally
{
  try { if( rs != null ) rs.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
   try { if( prep1 != null ) prep1.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
try { if( rs1 != null ) rs1.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
   try { if( connection != null ) connection.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
}

%>

Username : <%=username%><p/>
Password : <%=passwd%><p/>
Verify Password : <%=verify%>
<p/>
Name : <%=name%><p/>
Education : <%=education%></p>
City   : <%=city%></p>
State  : <%=state%></p>
Qualification : <%=qualify%></p>

Phone (H) : <%=house1%>&nbsp;&nbsp;<%=house2%></p>

Phone (O) : <%=office1%>&nbsp;&nbsp;<%=office2%></p>

Handphone : <%=mobile1%>&nbsp;&nbsp;<%=mobile2%></p>

Email    :<%=email%></p>

Notification :<%=notify%></p>

Address  : <%=add1%></p>
           <%=add2%>



           




</Body>
</html>

Thanks

0
 
LVL 35

Expert Comment

by:TimYates
Comment Utility
Errr...yes....that's fine...

What's wrong with it?  vol2 will post the form to vol

Then in vol, you can get the values out with:

request.getParameter( "username" ) ;

etc
0
 

Author Comment

by:Jasbir21
Comment Utility
Tim,
 I got one more question to ask,

i don't know what's wrong with this statement:




String y="update accou set " +"password='"+passwd+"'," + "verifypassdword='" +verify+"' " +
"where username='"+username+"'";

Thanks

0
 

Author Comment

by:Jasbir21
Comment Utility
I get it , put the action in the form , i thought you meant post the vol codes.


Could you pls look at the sql statement, really don't know what's wrong
Thanks
0
 
LVL 35

Expert Comment

by:TimYates
Comment Utility
Should be ok, so long as the username or password doesn't include ' chars

Have you considered PreparedStatements?

Much easier for this sort of thing...

And the string looks nicer like:

        String y = "update accou set password='" + passwd + "', verifypassdword='" +verify+ "' where username='" + username + "'" ;
0
 
LVL 35

Expert Comment

by:TimYates
Comment Utility
Change:

try
{
passwd=vol.getPasswd();
verify=vol.getVerifypwd();
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "", "");


String y="update accou set " +"password='"+passwd+"'," + "verifypassdword='" +verify+"' " +
"where username='"+username+"'";

prep1=connection.prepareStatement(y);
prep1.executeUpdate();

S
}

to:

try
{
    passwd=vol.getPasswd();
    verify=vol.getVerifypwd();
    Class.forName("com.mysql.jdbc.Driver").newInstance();
    connection = DriverManager.getConnection(connectionURL, "", "");

    String y = "update accou set password=?, verifypassdword=? where username=?" ;

    prep1=connection.prepareStatement( y );
    prep1.setString( 1, passwd ) ;
    prep1.setString( 2, verify ) ;
    prep1.setString( 3, username ) ;
    prep1.executeUpdate();
}
0
 

Author Comment

by:Jasbir21
Comment Utility
Hi,
 
  I guess i did something wrong,  i didn't get any errors but the data is not updating..
0
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LVL 35

Expert Comment

by:TimYates
Comment Utility
Any stack traces being output in the log files?
0
 

Author Comment

by:Jasbir21
Comment Utility
Surprisingly no,

it is as if the code the understand which user i am pointing to
0
 
LVL 35

Expert Comment

by:TimYates
Comment Utility
can you post your updating code?

(vol.jsp)?
0
 

Author Comment

by:Jasbir21
Comment Utility
I tried something, i changed:

 <form action="vol.jsp">

to

<form action="vol2.jsp">

meaning that after pressing the submit , i call the same page back and not vol.jsp,suprisingly it gets updated,
but then how do i call vol.jsp

user would use vol2.jsp to input data

the vol.jsp code just shows the data inputed:
<%@ page import="java.sql.*"%>
<Html>
<body>

<%
String connectionURL = "jdbc:mysql://localhost:3306/mydatabase?user=;password=";
Connection connection = null;

PreparedStatement prep1;
prep1=null;
ResultSet rs=null;
ResultSet rs1=null;
Statement statement=null;
String username=null;
String passwd=null;
String verify=null;
String name=null;
String education=null;
String city=null;
String state=null;
String post=null;
String qualify=null;
String house1=null;
String house2=null;
String office1=null;
String office2=null;
String mobile1=null;
String mobile2=null;
String email=null;
String notify=null;
String add1=null;
String add2=null;

Statement statement1=null;

try
{

Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "", "");
statement=connection.createStatement();
String myquery="select * from accou where username='jasbir22'";
rs=statement.executeQuery(myquery);

boolean anyRecords=rs.next();

String query="select * from my where username='jasbir22'";
statement1=connection.createStatement();
rs1=statement1.executeQuery(query);
boolean any=rs1.next();

if(rs1.getString(1).trim().equals(rs.getString(1).trim()))
{
name=rs1.getString(2).trim();
education=rs1.getString(3).trim();
city=rs1.getString(4).trim();
state=rs1.getString(5).trim();
post=rs1.getString(6).trim();
qualify=rs1.getString(7).trim();
house1=rs1.getString(8).trim();
house2=rs1.getString(9).trim();
office1=rs1.getString(10).trim();
office2=rs1.getString(11).trim();
mobile1=rs1.getString(12).trim();
mobile2=rs1.getString(13).trim();
email=rs1.getString(14).trim();
notify=rs1.getString(15).trim();
add1=rs1.getString(16).trim();
add2=rs1.getString(17).trim();


username=rs.getString(1).trim();

passwd=rs.getString(2).trim();
System.out.println(passwd);
verify=rs.getString(3).trim();


}



}
catch(SQLException ex )
{
   ex.printStackTrace() ;
}
catch( ClassNotFoundException ex )
{
   ex.printStackTrace() ;
}
finally
{
  try { if( rs != null ) rs.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
   try { if( prep1 != null ) prep1.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
try { if( rs1 != null ) rs1.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
   try { if( connection != null ) connection.close() ; } catch( Exception ex ) {ex.printStackTrace() ;}
}

%>

Username : <%=username%><p/>
Password : <%=passwd%><p/>
Verify Password : <%=verify%>
<p/>
Name : <%=name%><p/>
Education : <%=education%></p>
City   : <%=city%></p>
State  : <%=state%></p>
Qualification : <%=qualify%></p>

Phone (H) : <%=house1%>&nbsp;&nbsp;<%=house2%></p>

Phone (O) : <%=office1%>&nbsp;&nbsp;<%=office2%></p>

Handphone : <%=mobile1%>&nbsp;&nbsp;<%=mobile2%></p>

Email    :<%=email%></p>

Notification :<%=notify%></p>

Address  : <%=add1%></p>
           <%=add2%>



     

</Body>
</html>
0
 
LVL 35

Expert Comment

by:TimYates
Comment Utility
oh...

vol doesn't do any updating in it...  you do the update in vol2...

I would add a bit to vol2

get the form to post to vol2

and after you do the update, do:

response.sendRedirect( "vol.jsp" ) ;
0
 

Author Comment

by:Jasbir21
Comment Utility
Hi,
 When i put the line, it automatically redirects to vol.jsp.
But I need to redirect it only after, the user presses the submit button because, then only i can enter the changes(update S) and then press submit,


Thanks



 
0
 
LVL 35

Expert Comment

by:TimYates
Comment Utility
put a hidden value into the form:

<form action="vol2.jsp">
  <input type="hidden" name="posted" value="yes">
   ...rest of your form...
</form>

then, only redirect (and do the update) if this value exists;

if( request.getParameter( "posted" ) != null )
{
  // form was posted!!  Not just a click!!
0
 

Author Comment

by:Jasbir21
Comment Utility
Wow,it s working, thanks so much,
I would learn more on hidden type,it is very interesting .

Thanks again
0

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