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GRR
Hi,
1)login.jsp:
<%@page import="java.sql.*"%>
2)check.jsp:
<% String user=request.getParameter("user"); String pass=request.getParameter("pass"); if(user.equals("")&&pass.equals("")){ response.sendRedirect("login.jsp"); } else{ } %>
Once validating in check.jsp, i want error message on login.jsp like 'username or password is not provided' if username or password is null.
How get above thing.
View Answers
December 14, 2010 at 11:07 AM
Hi Friend,
Try the following code:
1)login.jsp:
<html>
<script>
function validate(){
var username=document.form.user.value;
var password=document.form.pass.value;
if(username==""){
document.getElementById('lab1').innerHTML="<small><font color='red'>Enter Username!</font></small>";
return false;
}
if(password==""){
document.getElementById('lab2').innerHTML="<small><font color='red'>Enter Password!</font></small>";
return false;
}
return true;
}
</script>
<form name="form" method="post" action="check.jsp" onsubmit="javascript:return validate();">
<table>
<tr><td>Username:</td><td><input type="text" name="user"><label id="lab1"></label></td></tr>
<tr><td>Password:</td><td><input type="password" name="pass"><label id="lab2"></label></td></tr>
<tr><td></td><td><input type="submit" value="Submit"></td></tr>
</table>
</form>
</html>
<%String msg=request.getParameter("msg");
if(msg!=null){
%>
<label><font color="red"><%=msg%></font></label>
<%
}
%>
2)check.jsp:
<%@page import="java.sql.*"%>
<%
String user=request.getParameter("user");
String pass=request.getParameter("pass");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:student");
Statement st=con.createStatement();
ResultSet rs=st.executeQuery("select * from login where uname='"+user+"' and password='"+pass+"'");
int count=0;
while(rs.next())
{
count++;
}
if(count>0)
{
out.println("welcome "+user);
}
else
{
response.sendRedirect("login.jsp?msg=Invalid Username or Password");
}
%>
Thanks
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