validation

Home Answers Viewqa JSP-Servlet validation

QuestionAsk Questions?

karthic chakravarthy

validation
1 Answer(s) a year and 10 months ago
Posted in : JSP-Servlet

How to validate username and password in a login screen?

View Answers

July 7, 2011 at 4:11 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="check.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; 
    document.getElementById("lab").innerHTML=showdata;  
    document.getElementById("lab").style.color="red";
    document.getElementById("username").value=" ";
    document.getElementById("password").value="";
    } 
}
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>
<label id="lab"></label>
</form>
</html>

2)check.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){
            %>
            <jsp:forward page="success.jsp"/>
            <%
          }
          else{
             data="Username or Password is Invalid!";
          }
out.println(data);
System.out.println(data);
}
catch(Exception e){
System.out.println(e);
}
%>

validation
validation validation

validation
validation we are doing payroll system project in java.So pls provide the complete validation code for employee master form

validation.....
validation..... hi.......... thanks for ur reply for validation code. but i want a very simple code in java swings where user is allowed to enter only numerical values in textbox , if he enters string values then it should

validation
Validation method valid the in put. otherwise call the javascript onsubmit to check... code.Ok if you use struts then you can use Validation method valid the in put

Validation
); JLabel label=new JLabel("JTable validation Example",JLabel.CENTER); JPanel panel=new JPanel(); panel.add(scroll); JFrame frame=new JFrame("JTable validation

validation
validation please help me to check validation for <form> <table class="form"> <tr> <td class="col1"> <label>Sno:</label> </td> <td

validation

Validation

validation

Validation

validation

validation files
validation files If I place validation files in the folder where the action classes are present,will there any error arise

javascript validation
javascript validation validation of comparing dropdownlist and textbox in javascript

Validation - Struts
Validation what is the best way to use validation in Struts?either "validation.xml" or JavaScript

validation query
validation query where I should kept properties file inside struts Web application

form validation
form validation how the form validation is done in jsf form using javaScript

NSURL Validation
NSURL Validation How to validate a NSURL string using special character validation

email validation
email validation during email validation.... after domain name which it means if example example@gmail.co .... this address allowed by any validation program .... but i want to show invalid email address because domain name com

Validation of datepicker
Validation of datepicker I have a datepicker in my JSp...the seleted dates are put in a text box. I want the alert the user from selecting future... a future date is entered..How to do this validation in javascript or jsp

Form Validation
Form Validation Java script validation for checking special characters and white spaces and give an alert.Please help me urgent Thanks in advance

comboBox validation
comboBox validation dear sir. i want to know . how to validate radio button in struts using xml validation. thanks

Date Validation
Date Validation Hi, I need Date Validation using java in spring framework. Please Anyone help me... Thanks in advance

validation - Framework
validation how to validate the action forms in struts? could you please explain how cross validation is done for date? You go the following url: http://www.roseindia.net/struts/struts-login-form.shtml

date validation
date validation sir, pls provide date validation code in javascript..we want to include it into our master form.. Please visit the following link: http://www.roseindia.net/mysql/datevalidation.shtml

Struts validation
Struts validation I want to put validation rules on my project.But after following all the rules I can't find the result. I have extended... validation rules,put the plugins inside strutsconfig.xml, put the html:errors tag

Validation - Struts
Validation How can i use validation framework i don't understand am...; Hi friend, Phone validation using javaScript function... return true; } Phone Validation

Validation doubt
Validation doubt hi..... thanks for the other validation code. I have got that and implemented in my code but i have a doubt in that. As we try to put string values its not allowing to do tht it gives us message its right

javascript validation
validation and for email field it will check formate useing regularexpressions...;html Email Validation function checkEmail... your question properly.. validation for name it is useful try

String Validation
String Validation changing password Hi. I have a HTML coding in that I have to check whether the value given in the 2 password fields are same or not. Its for the form changing password. If they are not same it should give

form validation
want validation code,username minimum 8 char,password length must >6,and one

Server side validation vs client side validation
Server side validation vs client side validation Can any one tell me the difference between these two different ways of Validation? Also features of Server side validation vs client side validation. The client side

alert for validation
alert for validation i want to put alert on the text box that enter data should be in DD/MM/YYYY format only through javascript validation. <html> <script type='text/javascript'> var

struts validation
struts validation I want to apply validation on my program.But i am failure to do that.I have followed all the rules for validation still I am unable to solve the problem. please kindly help me.. I describe my program below

JavaScript Form Validation
JavaScript Form Validation JavaScript Form Validation

problem in validation

validation - Struts

Html validation

validation - Struts

user validation

Date validation

dob validation

javascript validation

jsp validation

Ask Questions?

If you are facing any programming issue, such as compilation errors or not able to find the code you are looking for.

Ask your questions, our development team will try to give answers to your questions.

Tutorial Topics