Team) object-oriented design

First, object-oriented programming

Divided into two parts, search object design and constraints, service level design reference.

Package news;

/** * <p>title: News search Engine </p>
* <p>copyright:copyright (c) 2003</p> * <p>company: </p> * @author computer 99630 Shen * @version 1.0 * @ Download:http://www.codefans.net * *

Import java.io.IOException;

Import Org.apache.lucene.analysis.cn.ChineseAnalyzer; Import org.apache.lucene.document.Document; Import Org.apache.lucene.document.Field; Import Org.apache.lucene.index.IndexWriter;

public class Index {

IndexWriter _writer = null; Index () throws Exception {_writer = new IndexWriter ("C:\\news\\index", New Chineseanaly   Zer (), true); }

/** * Add each piece of news to the index * @param URL of a news message * @param title of Title * @throws java.lang.Exception */void Addnews (String     URL, String title) throws Exception {document _doc = new Document ();     _doc.add (Field.text ("title", title));     _doc.add (field.unindexed ("url", url));   _writer.adddocument (_doc); }

/** * Optimize and clean resources * @throws java.lang.Exception */void Close () throws Exception {_writer.optimize ();   _writer.close (); } }

Package news;

/** * <p>title: News search Engine </p>
* <p>copyright:copyright (c) 2003</p> * <p>company: </p> * @author computer 99630 Shen * @version 1.0 * @ Download:http://www.codefans.net * *

Import Java.util.Iterator; Import Java.util.Vector;

Import Com.heaton.bot.HTMLPage; Import Com.heaton.bot.HTTP; Import Com.heaton.bot.Link;

public class Htmlparse {HTTP _http = null;   Public Htmlparse (http http) {_http = http; }

 /**    * Index Web page after parsing */public void start () {    try {      HtmlPage _page = new HtmlPage (_http);       _page.open (_http.geturl (), NULL);       Vector _links = _page.getlinks ();       Index _index = new Index ();       Iterator _it = _links.iterator ();       int n = 0;       while (_it.hasnext ()) {        link _link = (link) _ It.next ();         String _herf = input (_link.gethref (). Trim ());         String _title = input (_link.getprompt (). Trim ());         _index. Addnews (_herf, _title);         n++;      }       System.out.println ("Total scan to" + N + "news");       _index.close ();    }     catch (Exception ex) {      System.out.println (ex); & nbsp;  }  }  /**    * Solve Chinese problem in Java * @param str input Chinese * @return Decoded Chinese */public static string input (String str) {    string temp = null;     if (str! = null) {       try {        temp = new String (str.getbytes ("iso8859_1"));       }       catch (Exception e) {     }     }     return temp;  }

}

Package news;

/** * <p>title: News search Engine </p>
* <p>copyright:copyright (c) 2003</p> * <p>company: </p>
* @version 1.0 * @Download: http://www.codefans.net */

Import Com.heaton.bot.HTTP; Import Com.heaton.bot.HTTPSocket; Import com.heaton.bot.ISpiderReportable; Import com.heaton.bot.IWorkloadStorable; Import Com.heaton.bot.Spider; Import Com.heaton.bot.SpiderInternalWorkload;

public class Searcher     implements Ispiderreportable {  public static void main (string[] args) thro WS Exception {    iworkloadstorable wl = new Spiderinternalworkload ();     Searcher _searc her = new Searcher ();     spider _spider         = new Spider (_searcher, "/HTTP/ Www.chenshen.com/index.html ",                       new Httpsocket (), (+), WL);     _spider.setmaxbody (100);     _spider.start ();  }   Public boolean foundinternallink (String URL) {    return false,  }   public Boo Lean foundexternallink (string url) {    return false;  }   public Boolean foundotherlink (string URL) {    return false;  }   public void Processpage (http http) {    System.ou T. println ("Scan page:" + http.geturl ());     New Htmlparse (HTTP). Start ();  }   public void Completepage (http http, boolean error) { }   public Boolean getremovequery () {&NB sp;   return true;  }   public void Spidercomplete () { }}

Package newsserver;

Import java.io.IOException; Import Java.io.PrintWriter; Import javax.servlet.ServletException; Import Javax.servlet.http.HttpServlet; Import Javax.servlet.http.HttpServletRequest; Import Javax.servlet.http.HttpServletResponse;

Import Org.apache.lucene.analysis.Analyzer; Import Org.apache.lucene.analysis.cn.ChineseAnalyzer; Import org.apache.lucene.document.Document; Import Org.apache.lucene.queryParser.QueryParser; Import org.apache.lucene.search.Hits; Import Org.apache.lucene.search.IndexSearcher; Import Org.apache.lucene.search.Query;

/** * <p>title: News search Engine </p>
* <p>copyright:copyright (c) 2003</p> * <p>company: </p>
* @version 1.0 * @Download: http://www.codefans.net */

Public class Results     extends HttpServlet {private static final String Content_Type = "text/html; CHARSET=GBK ";  //INITIALIZE Global variables   public void init () throws servletexception { }

 //process The HTTP Get request   public void doget (HttpServletRequest request, httpservletresponse response ) throws       Servletexception, IOException {    String QC = Request.getparameter ("Querycontent");     if (QC = = null) {      QC = "";    }     Else {      QC = input (QC);    }      Response.setcontenttype (Content_Type);     PrintWriter out = Response.getwriter ();     try {      Search (QC, out);    }     catch ( Exception ex) {      System.out.println (ex.getmessage ());    }  }

  public void Search (String QC, printwriter out) throws Exception {   //create an index from the index directory Indexsearcher _searcher = new Indexsearcher ("C:\\news\\index");    //creation of standard analyzers Analyzer Analyzer = new Chineseanalyzer ();    //Query conditions String line = QC;    //Query is an abstract class query query = Queryparser.parse (line, "title", analyzer);

    out.println ("

    Final int hits_per_page = 10;     for (int start = 0; start < Hits.length (); start + = Hits_per_page) {      int end = Math.min (Hits.length (), start + hits_per_page);       for (int i = start; i < end; i++) {        Document Doc = Hits.doc (i);         String url = doc.get ("url");         if (url! = null) {          Out.println ((i + 1) + "<a href=" + URL + "' >" +           &nbsp ;           Replace (Doc.get ("title"), QC) +                        " </a><br> ");        }         else {          System.out.println ("not Found! ");        }      }    } out.println ("< /body>

public string input (String str) {string temp = null;       if (str = null) {try {temp = new String (str.getbytes ("iso8859_1"));   } catch (Exception e) {}} return temp; }

public string Replace (string title, string keyword) {return title.replaceall (keyword, "<font color= ' Red ' >" + ke   Yword + "</font>"); };

Clean up resources public void Destroy () {}}

Team) object-oriented design