myservlet.java

关于Ultraseek的一些用法,刚初学,所以都是比较简单

/* -*- mode:java; indent-tabs-mode:nil; c-basic-offset:2 -*-
 * $RCSFile$ $Revision: 1.9 $ $Date: 2006/02/01 00:20:30 $
 * No copyright is asserted for this file.
 */

import java.io.*;
import java.net.*;

import javax.servlet.*;
import javax.servlet.http.*;

import com.ultraseek.xpa.search.*;

/**
 * This Servlet demonstrates how to customize the standard
 * <code>SearchServlet</code> for your site's environment.
 * <p>
 * The following UI changes, compared to the standard Servlet,
 * are implemented in this sample file:
 * <blockquote>
 * <table border=1>
 * <tr><td>What</td><td>Why</td><td>How</td><tr>
 * <tr><td>Do not display the score for a search hit</td>
 *     <td>Score isn't all that meaningful.</td>
 *     <td>Override SearchRequest.ShowOneHitScore</td>
 * </tr>
 * <tr><td>Do not display the "score bar" for a search hit</td>
 *     <td>Less cluttered display.</td>
 *     <td>Override SearchRequest.ShowOneHitScoreBar</td>
 * </tr>
 * </table>
 * </blockquote>
 * Additionally, this sample overrides <code>getUltraseekURL</code> 
 * to determine the network location of the Ultraseek
 * search server to use for query processing.
 * <p>
 * Ultraseek recommends you customize <code>SearchServlet</code>
 * first via the Ultraseek style editor, 
 * and then by extending the <code>SearchServlet</code> class 
 * and overriding methods.  Your customizations
 * will then more easily migrate to future revisions
 * of Ultraseek server and XPA.
 * <p>
 * If modification of <code>SearchServlet</code> is necessary to
 * make your customizations, we recommend you submit
 * your <code>SearchServlet</code> modifications to Ultraseek
 * support for possible inclusion in future XPA releases.
 *
 * @version 2.1
 * @since XPA2.1
 * @serial exclude
 */
public class MyServlet 
  extends SearchServlet {

  /**
   * Returns the URL to access the Ultraseek search server.
   * The protocol, hostname, and port are used from the URL
   * @see SearchServlet#initUltraseek
   */
  protected URL getUltraseekURL() 
    throws ServletException {

    // This is a sample implementation.
    // These values are coming from Servlet Context init variables,     
    // set in web.xml file.
    // Use your own Servlet Container's approach. 
    String serverName     = getServletConfig().getInitParameter("ServerName");
    String serverPort     = getServletConfig().getInitParameter("ServerPort");
    String serverProtocol = getServletConfig().getInitParameter("ServerProtocol");

    // For demo purposes, use your local server if no server specified
    if (serverName==null)     serverName     = "localhost";
    if (serverPort==null)     serverPort     = "8765";
    if (serverProtocol==null) serverProtocol = "http";

    String where = serverProtocol+"://"+serverName+":"+serverPort;

    try {
      return new URL(where);
    } catch (MalformedURLException e) {
      throw new ServletException("Malformed Ultraseek server locator: " + where,
                                 e);
    }
  }

  public String getServletInfo() {
    return MyServlet.class.getName() +
      " based on\n" +
      super.getServletInfo();
  }


  /**
   * Handle a single search request.
   * One instance of <code>SearchRequest</code> is made for
   * each search query received.
   * Customization of output can be done by overriding
   * the methods defined in <code>SearchRequest</code>
   */
  class SearchRequest
    extends SearchServlet.SearchRequest {

    public SearchRequest(HttpServletRequest req, HttpServletResponse resp)
      throws IOException {
      super(req,resp);
    };

    /**
     * Customize output by NOT showing a search result's score.
     * This customization could also be applied using 
     * the Ultraseek style editor.
     */
    protected void showOneHitScore(SearchResult sr) {
      // Do nothing
    }

    /**
     * Customize output by NOT showing a search result's score bar.
     * This customization could also be applied using 
     * the Ultraseek style editor.
     */
    protected void showOneHitScoreBar(SearchResult sr) {
      // Do nothing
    }

  }

  /**
   * Override the standard <code>makeSearchRequest</code>, as
   * we've customized methods in <code>SearchRequest</code>.
   */
  protected SearchServlet.SearchRequest makeSearchRequest(HttpServletRequest req,
                                                          HttpServletResponse resp) 
    throws IOException {
    return new MyServlet.SearchRequest(req,resp);
  }

}