search.java

《J2EE企业级应用开发》一书的配套源代码

package com.j2eeapp.cdstore.servlet;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import com.j2eeapp.cdstore.bean.ShoppingSession;


public class Search extends HttpServlet
{
    
    /**
     * @J2EE_METHOD  --  doGet
     * Called by the server (via the service method) to allow a servlet to handle a GET request.
     * The servlet container must write the headers before committing the response, because
     * in HTTP the headers must be sent before the response body. The GET method should
     * be safe and idempotent. If the request is incorrectly formatted, doGet returns an
     * HTTP 'Bad Request' message.
     * @throws javax.servlet.ServletException
     * @throws java.io.IOException
     */
    public void doGet    (HttpServletRequest request, HttpServletResponse response) 
                throws ServletException, IOException 
    {
		try {
			 	ShoppingSession shoppingSession = (ShoppingSession) request.getSession().getAttribute("shoppingSession");
		 		shoppingSession.setSearchString((String)request.getParameter("cdtitle"));
		 		shoppingSession.search();
		 		
		 	}
		   catch (Exception ex)
		  {
	      		ex.printStackTrace();
	      }
	    RequestDispatcher d = request.getRequestDispatcher("searchresults");
	    d.forward(request, response);
		 
    }
    
    /**
     * @J2EE_METHOD  --  doPost
     * Called by the server (via the service method) to allow a servlet to handle a POST
     * request. The HTTP POST method allows the client to send data of unlimited length
     * to the Web server a single time and is useful when posting information such as credit
     * card numbers. If the HTTP POST request is incorrectly formatted, doPost returns
     * an HTTP 'Bad Request' message.
     * @throws javax.servlet.ServletException
     * @throws java.io.IOException
     */
    public void doPost    (HttpServletRequest request, HttpServletResponse response) 
                throws ServletException, IOException 
    {
			doGet(request,response);
    }
    
    
}