getParameterValues() method of Servlet Request

Example on getParameterValues() method of Servlet Request

index.html

<font face="verdana" size="2px">

     <form action="onGPV" method="post">

     Habits :

        <input type="checkbox" name="habits" value="Reading">Reading

        <input type="checkbox" name="habits" value="Movies">Movies

        <input type="checkbox" name="habits" value="Writing">Writing

        <input type="checkbox" name="habits" value="Singing">Singing

        <input type="submit" value="Submit">

     </form>

</font>

OngetParameterNames.java

package java4s;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Iterator;

import java.util.Map;

import java.util.Set;

 import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

 public class OngetParameterValues extends HttpServlet  

{

    protected void doPost(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException

    {

        PrintWriter pw=res.getWriter();

        res.setContentType("text/html");

        String[] values=req.getParameterValues("habits");

        pw.println("Selected Values...");    

        for(int i=0;i<values.length;i++)

       {

           pw.println("<li>"+values[i]+"</li>");

       }

       pw.close();    

    }

}

web.xml

<web-app>

     <servlet>

        <servlet-name>ongetParameterValues</servlet-name>

        <servlet-class>java4s.OngetParameterValues</servlet-class>

    </servlet>

    <servlet-mapping>

            <servlet-name>ongetParameterValues</servlet-name>

            <url-pattern>/onGPV</url-pattern>

    </servlet-mapping>

   <welcome-file-list>  

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

   </welcome-file-list>

</web-app>