Monday, 5 May 2014

Servlets : Send Redirect Demo[Transfer control to different domain]


Click here to watch in Youtube : https://www.youtube.com/watch?v=8LjrXsgK080

Click the below Image to Enlarge



SendRedirectDemo Project Dir Structure


MySearchServlet.java
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MySearchServlet extends HttpServlet
{

    private static final long serialVersionUID = 1L;

    public void init() throws ServletException
    {
        System.out.println("----------------------------------");
        System.out.println(" Init method is called in "
                + this.getClass().getName());
        System.out.println("----------------------------------");
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {
        String searchKey = request.getParameter("searchKey");
        response.sendRedirect("https://www.google.co.in/#q=" + searchKey);
    }

    public void destroy()
    {
        System.out.println("----------------------------------");
        System.out.println(" destroy method is called in "
                + this.getClass().getName());
        System.out.println("----------------------------------");
    }
}

web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    metadata-complete="true" version="3.0">
    
    <display-name>SendRedirectDemo</display-name>
    
    <description>
        This is a simple web application with a source code organization
        based on the recommendations of the Application Developer's Guide.
    </description>
    
    <servlet>
        <servlet-name>search</servlet-name>
        <servlet-class>MySearchServlet</servlet-class>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>search</servlet-name>
        <url-pattern>/search</url-pattern>
    </servlet-mapping>

</web-app>

index.html
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>SendRedirectDemo</title>
</head>
<body>
    <li><a href="mysearch.html">mysearch</a></li>
</body>
</html>

mysearch.html
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>SendRedirectDemo</title>
</head>
<body>
    <form action="search">
        <input type="text" name="searchKey"> 
        <input type="submit" value="Google Search">
    </form>
</body>
</html>

Environment Used 

JDK version :1.6.0_30
Tomcat version : 7.0.50 

To Download SendRedirectDemo_Different_ContainerApp Project Click the below link

https://sites.google.com/site/javaee4321/servlets/SendRedirectDemo_Different_ContainerApp.zip?attredirects=0&d=1

See also:

  • Servlets Tutorial
  • All Design Patterns Links
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