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Код


<%-- 
    Document   : index
--%>

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>UPDATE</title>
    </head>
    <body bgcolor="D2E4E1">
    <a href='UpdateServlet?update=1'>Правка1</a>
    <br>
    <a href='UpdateServlet?update=2'>Правка2</a>
    <br>
    <a href='UpdateServlet?update=3'>Правка3</a>
    </body>
</html>

Код


<%-- 
    Document   : update
--%>

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body bgcolor="D2E4E1">
    <FORM NAME="update_form" ACTION="UpdateServlet" METHOD="GET">   
    <center>
        <textarea rows="9" name="messageText" cols="64" wrap="ON"></textarea>
          <p><input type="submit" value=" OK " name="btnSend"></p>
    </center>    
   </FORM>
    </body>

</html>

Код


package controller;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author 
 */
public class UpdateServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String parUpdate = null;
        String temp = null;
        String parId = request.getParameter("update");
            HttpSession session = request.getSession(true);
            session.setAttribute("update", parId);
            String value = (String)session.getAttribute("update");
            temp = value;
           RequestDispatcher dispatcher = request.getRequestDispatcher("/update.jsp");           
           if (session != null) {
           dispatcher.forward(request, response);
           parUpdate = request.getParameter("messageText");
           }    

           System.out.println("Значение ссылки: "+value);
           System.out.println("Текст: "+parUpdate);
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            out.println("<html>");
            out.println("<head>");
            out.println("<title>www</title>");
            out.println("</head>");
            out.println("<body>");
            
            out.println("<h1>Значение ссылки: "+value+"</h1>");
            out.println("<h1>Текст: "+parUpdate+"</h1>");
            
            out.println("</body>");
            out.println("</html>");
        } finally {
            out.close();
        }
    }
}