Difference Between Rd.Forward () Res. sendRedirect ()

Example on sendRedirect ()

Servlet program redirects the request to non-java web resource programs of websites hosted on the Internet.

The applications in the next page acts as a hub for working with multiple search engines.

The above application the servlet searchSrv redirects the request to search engine based on the search engine that is chosen in the form page.

To work with above application gather the web resource program names and

request parameter names of different search engines as shown below:

For google

http://www.google.co.in/search?q=new+seven+wonders

For Yahoo

http://search.yahoo.com/search?q=new+seven+wonders

For Bing

http://search.bing.com/search?q=new+seven+wonders

Develop the above web application

Step 1: Prepare the deployment directory structure of web application.Step 2: Develop the source code of above servlet program or web application.

Search.html

<form action= “surl” method= “get”>

  <center>

    <font color= ‘red’ size= ‘6’>

      <marquee behavior= ‘alternate’> SERCH ENGINE </marquee> <br> <br>

        SEARCH :<INPUT TYPE=“TEXT” height=‘45’SIZE=“50” NAME=“turl”> <br>

        <input type= “submit” name= “tsubmit” value= “search”> <br> <br>

          GOOGLE: <input type= “radio” name= “tradio” value= “google” CHECKED />

          YAHOO: <input type= “radio” name= “tradio” value= “yahoo/>

          BING: <input type= “radio” name= “tradio” value= “bing”/>

    </font>

 </center>

</form>

SearchApp.java

import javax.servlet.*;

import javax.servlet.http.*;

import java.io.*;

public class SearchApp extends HttpServlet {

  public void doGet(HttpServletRequest req,HttpServletResponse res)

   throwsServletException,IOException {

     //general Setting

     res.setContentType(“text/html);

     PrintWriter pw=res.getWriter();

     //read form data

     String s=req.getParameter(“turl”);

     String radio=req.getParameter(“tradio”);

     if(radio.equals(“google”)) {

      res.sendRedirect(“https://www.google.co.in/search?q=”+s);

     }

     elseif {

      res.sendRedirect(“https://www.yahoo.com/search?q=”+s);

     }

     else

      res.sendRedirect(“https://www.bing.com/search?q=”+s);

  }//end of doGet ()

}

web.xml

<web-app>

     <servlet>

        <servlet-name> abc </servlet-name>

        <servlet-class>SearchApp</servlet-class>

     </servlet>

     <servlet-mapping>

         <servlet-name> abc </servlet-name>

         <url-pattern> /surl </url-pattern>

     </servlet-mapping>

     <welcome-file-list>

        <welcome-file> home.html </welcome-file>

     </welcome-file-list>

</web-app>

Step 3: Compile the source files of all servlet programs.

Step 4: Configure all four servlet programs in web.xml file having four different URL patterns.

Step 5:  Start the server (Tomcat).

Step 6: Deploy the web application and Copy SearchApp folder to Tomcat_home\webapps folder.

Step 7: Test the web application.Open browser window type this url: https://ecomputernotes.com:2020/SearchApp/Search.html.

After clicking search button b, open web site in Google Search engine.