jsp code for a drop down box to retrive value from database

my project needs to get the value from database in to the drop down box..... pls give me code for that ..... tan q

View Answers

April 4, 2012 at 3:25 PM

1)login.jsp:

<html>
<script>
function validate(){
var username=document.form.user.value;
var password=document.form.pass.value;
if(username==""){
 alert("Enter Username!");
  return false;
}
if(password==""){
 alert("Enter Password!");
  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"></td></tr>
<tr><td>Password:</td><td><input type="password" name="pass"></td></tr>
<tr><td>Select Company: </td><td>
<select name="com">
<%
Class.forName("com.mysql.jdbc.Driver").newInstance();
    Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
           Statement st=con.createStatement();
           ResultSet rs=st.executeQuery("select * from login");
           while(rs.next()){
           %>

<option value="<%=rs.getString("company")%>"><%=rs.getString("company")%></option>
<%
           }
%>
</select>
</td></tr>
<tr><td></td><td><input type="submit" value="Login"></td></tr>
</table>
</form>
</html>

2)check.jsp:

<%@page import="java.sql.*"%>
<%
try{
String user=request.getParameter("user");
String pass=request.getParameter("pass");
String com=request.getParameter("com");
 Class.forName("com.mysql.jdbc.Driver").newInstance();
    Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
           Statement st=con.createStatement();
           ResultSet rs=st.executeQuery("select * from login where username='"+user+"' and password='"+pass+"'and company='"+com+"'");
           int count=0;
           while(rs.next()){
           count++;
          }
          if(count>0){
           out.println("welcome "+user);
           }
          else{
           response.sendRedirect("login.jsp");
          }
        }
    catch(Exception e){
    System.out.println(e);
}
%>

April 8, 2012 at 10:58 AM

this code is not running exactly... i am getting a blank page while running check.jsp and the value of company is not fetched ..the dropdown is shown empty ... thanks in advance ...

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