message box

Ads

Share on Google+

maithri

message box
1 Answer(s) 6 years and 7 months ago
Posted in : JSP-Servlet

How to show the message "invalid username and password" after redirecting the page to the login form?

Ads

View Answers

February 28, 2011 at 4:06 PM

JSP Login validation

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></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("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+"'");
int count=0;
          while(rs.next())
          {

                   count++;
          }

                    if(count>0)
          {
            out.println("welcome "+user);
          }
          else
          {
                       response.sendRedirect("login.jsp?msg=Invalid Username or Password");
          }
%>

Ads

Advertisements

Java Message Box - Java Beginners
Java Message Box I want to display the variable value in message box...); But the message box display nothing. Is there any way to display the value of s in message box. Please help me as soon as possible. Hi

Java Message Box
Java Message Box In this tutorials you will learn about how to create Message Box in Java. Java API provide a class to create a message Box in java. By message box we mean a box in which message is displayed or a box from which input

Message Box Java
In this section we will create a message box in Java using a Java API class. A certain message, warning or information can be displayed in this message box. Generally the message box is used to display error message. JOptionPane class

confirm message box - Java Beginners
confirm message box How can I create a confirm message with Yes and No button instead of OK/Cancel buttons in java script inside a jsp? ... Title', 'My Confirm Message', 2,0,0) if (retVal==true) return true; else

Show message and confirm dialog box
Show Message and Confirm Dialog Box - Swing Dialogs... types of message box. There are three types of message dialog box that you can.... Once you click on the first button then the simple message box will open which

input ang message box - Java Beginners
Boxes. Show the result with Message Dialog Boxes. Set the Message Dialog Box Type to Information Message. Hi Friend, Try the following code: import...input ang message box can you help me to calculates for the sum

how to add save,discard,& cancel button in a message box - Struts
how to add save,discard,& cancel button in a message box how to add save,discard,& cancel button in a message box

how do you change the message box to a specific color
how do you change the message box to a specific color How do you change the message box color to a specific color? I can get the color to change... the message box to red but its not really working. Can you help me

Show Dialog Box in Java
; Message dialog box is used to display informative... the message Dialog box. Our program display "Click Me" button on the window and when user clicks on it program displays Message box with "OK"

Flex Alert Box example
Flex Alert Box example Alert box is a dialog box that appears on window with some message and stays rigid until the event associated with it is not done. Alert

Java Alert Box
JOptionPane class to display the message alert box. JOptionPane class is available...Java Alert Box In this example we will describe java alert box. First of all we have created class than main method after that we have created alert box

difference between $message and $$message
difference between $message and $$message What is the difference between $message and $$message? Hi friends, $message is a simple variable whereas $$message is a reference variable. Example: $name = 'Bharat

What is the difference between $message and $$message?
What is the difference between $message and $$message? What is the difference between $message and $$message

message passing
message passing how message is passed using jade technology

Display alert box on clicking link
Display alert box on clicking link In this tutorial, we will display alert box to prompt message using jQuery. In the below program , html page contains a "a href" link. On clicking this link ,a alert box prompt message

Hollow Box
Hollow Box Write an application program that will draw a hollow box (a box with empty space in between). The program will ask the user to key in a whole number larger or equals to 5. An error message would appear if the user

Java Message Services - JMS
Java Message Services What is Java Message Services

Objective C Message Passing
Objective C Message Passing What exactly a message passing means in Objective C? and how can i pass a message to a method

Message Resource Bundle work.
Message Resource Bundle work. How does Value replacement in Message Resource Bundle work

Message Context in AXIS
Message Context in AXIS Is there any method in Axis classes to het the size of IN and OUT Message Conetext

Javascript alert message
Javascript alert message How to send an alert message to a user in JavaScript

HTML in the box
HTML in the box Can I use any HTML in the box

input box
input box give me the code of input box in core java

msg box in jsp
msg box in jsp 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

Popup dialog box in java
dialogs-user can customize dialog box. Here is a simple popup message dialog box...Popup dialog box in java How to display popup dialog box in java? Dialog Box- A dialog box is an independent small window which appear

javascript dom error-message
javascript dom error-message javascript dom error-message

how to send message
how to send message how to send message for mobile in server

websphere message broker - WebSevices
websphere message broker how can i find the heapsize of the execution group in the message broker using command console syntax

Ads

Advertisement null

Ads