Learn Java by Examples: How to redirect responses to a different JSP or Servlets ?.

Program to demonstrate how to redirect responses to a different JSP or Servlets

attributes_demo.jsp

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<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

<h2>How to redirect responses to a different JSP and Servlets ?</h2>
 <p>
  In order to redirect responses to a different JSP or Servlets </br>
  see demo example below : 
 </p>

 <form action="customer_info_display.jsp" method="post">
  <table cellspacing="5" border="0">
   <tr>
    <td align="right">First Name : </td>
    <td><input type="text" name="firstName"></td>
   </tr>
   <tr>
    <td align="right">Last Name : </td>
    <td><input type="text" name="lastName"></td>
   </tr>
   <tr>
    <td align="right">Email Address : </td>
    <td><input type="text" name="emailAddress"></td>
   </tr>
   
   <tr>
    <td></td>
    <td align="left"></br><input type="submit" value="Submit"></td>
   </tr>

  </table>
 </form>

</body>
</html>

customer_info_display.jsp

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<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

 <%@ page import="com.hubberspot.model.Customer"%>

 <%
  // Get the form requests 
  String firstName = request.getParameter("firstName");
  String lastName = request.getParameter("lastName");
  String emailAddress = request.getParameter("emailAddress");
  
  Customer customer = new Customer(firstName , lastName , emailAddress);
  
 %>



 <%
 // If first name entered other than Jonty
 // you will be redirected to invalid.jsp
 if(firstName.equalsIgnoreCase("Jonty"))
 {
 
 %>

 <table cellspacing="0" cellpadding="5" border="1">
  <tr>
   <td align="right">First Name :</td>
   <%-- Below is the JSP expression used to display string value of an expression --%>
   <td><%=customer.getFirstName()%></td>
  </tr>

  <tr>
   <td align="right">Last Name :</td>
   <td><%=customer.getLastName()%></td>
  </tr>

  <tr>
   <td align="right">Email Address :</td>
   <td><%=customer.getEmailAddress()%></td>
  </tr>
 </table>
 <%
    }
 else {
    response.sendRedirect("invalid.jsp"); 
 }
 
 %>

</body>
</html>

invalid.jsp

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<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

<h2> 
<p>
Sorry User ... You have entered wrong first name !!! ... <br>
Go back and type first name as : Jonty
</p>
</h2>

</body>
</html>

attributes_demo.jsp

invalid.jsp

customer_info_display.jsp