searchservlet.java

Prentice Hall published, H.M.Deitel writen.

// Fig. 16.29: GetDescriptionServlet.java
// Retrieves descripion of an item from database
package cartXML;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.text.*;
import java.sql.*;
import org.w3c.dom.*;

public class SearchServlet extends HttpServlet {
   private Database database;

   public void init( ServletConfig config )
      throws ServletException
   {
      super.init( config );
      database = new Database( "jdbc:odbc:catalog", "anonymous",
         "guest" );
      database.connect();
   }

   public void service( HttpServletRequest request,
      HttpServletResponse response )
      throws ServletException, IOException
   {
      try {
			ServletContext sc = getServletConfig().
            getServletContext();
			String query;
         String search = request.getParameter( "search" );
			String searchString = request.getParameter( "searchString" );

         if ( search.equals( "title" ) )
				query = "SELECT title FROM products WHERE title LIKE '%"  + searchString + "%'";
			else
				query = "SELECT title FROM products WHERE pubdate LIKE '%"  + searchString + "%'";

         ResultSet rs =  database.get( query );
			XMLCreator xmlCreator = new XMLCreator();
         Node searchNode = xmlCreator.initialize( "search" );

			int results = 0;
			while( rs.next() ) {
		    	Node productNode  = xmlCreator.addChild( searchNode,
		      	"book" );
		   	xmlCreator.addTextNode( xmlCreator.addChild(
		  			productNode, "title" ),
		   	rs.getString( "title" ) );
			results++;
			System.out.println("in loop");
         }

			if ( results == 0 )
				xmlCreator.addAttribute( searchNode, "total", "0" );
			else
				xmlCreator.addAttribute( searchNode, "total", String.valueOf( results ) );

			Processor processor = new Processor();
         response.setContentType( "text/vnd.wap.wml" );
			PrintWriter output = response.getWriter();
			processor.process( xmlCreator.getDocument(), "C:/jakarta-tomcat/webapps/chapter16/searchResults.xsl", output );

      }
      catch( SQLException sqlex ){}
   }

   public void destroy()
   { database.shutDown(); }
}

/*
 **************************************************************************
 * (C) Copyright 2001 by Deitel & Associates, Inc. and Prentice Hall.     *
 * All Rights Reserved.                                                   *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
 * and publisher shall not be liable in any event for incidental or       *
 * consequential damages in connection with, or arising out of, the       *
 * furnishing, performance, or use of these programs.                     *
 **************************************************************************
*/