Lucene 3.0.0 对搜索结果的高亮显示

文章参考： 一个Lucene 2.4.0对搜索结果高亮显示的代码

 

使用高亮显示时，需要单独引入lucene-highlighter-3.0.0.jar。这个jar包在目录lucene-3.0.0\contrib\highlighter中，把它复制到项目的lib文件夹，并在Java Build Path中添加其引用。

 

导入的package有：

import org.apache.lucene.search.highlight.Highlighter;
import org.apache.lucene.search.highlight.QueryScorer;
import org.apache.lucene.search.highlight.SimpleFragmenter;
import org.apache.lucene.search.highlight.SimpleHTMLFormatter;

 

使用Highlighter的搜索代码：

public void searchProgram() {
    System.out.println("请输入关键字: ");
    Scanner scanner = new Scanner(System.in);
    String queryStr = scanner.nextLine();
    System.out.println("您输入的关键字是:    " + queryStr);
    try {
      IndexSearcher searcher = new IndexSearcher(FSDirectory
          .open(new File(strIndexPath)));
      String strField = "content";
      QueryParser parser = new QueryParser(Version.LUCENE_CURRENT,
          strField, new SmartChineseAnalyzer(Version.LUCENE_CURRENT));
      Query query = parser.parse(queryStr);
      System.out.println(query.toString());
      TopDocs hits = searcher.search(query, 10);
      ScoreDoc[] scoreDoc = hits.scoreDocs;

      // 高亮显示设置
      Highlighter highlighter = null;
      SimpleHTMLFormatter simpleHTMLFormatter = new SimpleHTMLFormatter(
          "<read>", "</read>");
      highlighter = new Highlighter(simpleHTMLFormatter, new QueryScorer(query));
      // 这个100是指定关键字字符串的context的长度，你可以自己设定，因为不可能返回整篇正文内容
      highlighter.setTextFragmenter(new SimpleFragmenter(100));

      Document doc;
      DBConfigure dbConfigure = new DBConfigure();
      dbConfigure.OpenConn();
      ResultSet rs = null;
      String content = "";
      for (int index = 0; index < scoreDoc.length; index++) {
        doc = searcher.doc(scoreDoc[index].doc);
        System.out.println(doc.getField("URL").stringValue());
        System.out.println(doc.getField("title").stringValue());

        // 根据URL的MD5值查询数据库中取出相应的正文
        String URL_MD5 = UrlToFilePath.strMd5(doc.getField("URL")
            .stringValue().trim(), 1);
        String sql = "select content from page where url_md5='"
            + URL_MD5 + "'";
        rs = dbConfigure.executeQuery(sql);
        if (rs.next()) {
          content = rs.getString("content");
        }
        // 高亮显示摘要

        TokenStream tokenStream = new SmartChineseAnalyzer(Version.LUCENE_CURRENT).tokenStream("token",
            new StringReader(content));
        System.out.println(highlighter.getBestFragment(tokenStream, content));

      }
    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }