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periasamy.s
msg box in jsp
2 Answer(s)      3 years and 5 months ago
Posted in : JSP-Servlet


i need the source code to display the msgbox in jsp....but one condition is,i need to use it in the current page itself...now i use the message box means it prints it into another page...i need to resolve it plz try to help me..


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April 7, 2011 at 12:36 PM


1)login.jsp:

<html>
<head>
<script type="text/javascript">
function showData(){ 
    var user=document.getElementById("username").value;
    var pass=document.getElementById("password").value;
xmlHttp=GetXmlHttpObject()
var url="checkajax.jsp";
url=url+"?user="+user+"&&pass="+pass;
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}
function stateChanged(){ 
if(xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ 
    var showdata = xmlHttp.responseText; 
    alert(showdata);

    } 
}
function GetXmlHttpObject(){
var xmlHttp=null;
try{
  xmlHttp=new XMLHttpRequest();
 }
catch (e){
 try  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e){
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}
</script>
</head>
<form name="form">
<table>
<tr><td>Username:</td><td><input type="text" id="username"></td></tr>
<tr><td>Password:</td><td><input type="password" id="password"></td></tr>
<tr><td></td><td><input type="button" value="Submit" onclick="showData();"></td></tr>
</table>
</form>
</html>

2)checkajax.jsp:

<%@ page import="java.sql.*" %> 
<%
String user = request.getParameter("user");
String pass = request.getParameter("pass");
String data ="";
try{
           Class.forName("com.mysql.jdbc.Driver");
           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+"'");
          int count=0;
          while(rs.next())
          {

                   count++;
          }

                    if(count>0)
          {
             data="Welcome User!";
          }
          else
          {
                      data="Username or Password is Invalid!";
          }

out.println(data);
System.out.println(data);
}
catch (Exception e) {
System.out.println(e);
}
%>


July 3, 2011 at 10:38 PM


it is tough to understand the code simply i need is first i have to validate whether all the fields are filled . if filled it has to move to the corresponding jsp file else it has to show an alert box that the particular field is not filled



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