5 Lucene笔记（五）：搜索结果高亮

packagech.lucene.app;

importjava.util.ArrayList;

importjava.util.List;

importorg.apache.lucene.document.Document;

importorg.apache.lucene.index.IndexWriter;

importorg.apache.lucene.queryParser.QueryParser;

importorg.apache.lucene.search.IndexSearcher;

importorg.apache.lucene.search.Query;

importorg.apache.lucene.search.ScoreDoc;

importorg.apache.lucene.search.TopDocs;

importorg.apache.lucene.search.highlight.Formatter;

importorg.apache.lucene.search.highlight.Highlighter;

importorg.apache.lucene.search.highlight.QueryScorer;

importorg.apache.lucene.search.highlight.Scorer;

importorg.apache.lucene.search.highlight.SimpleHTMLFormatter;

importorg.junit.Test;

importch.lucene.entity.Article;

importch.lucene.utils.LuceneUtils;

publicclassFourApp {

    @Test

    public void createIndexDB()throwsException {

      Articleart= newArticle(1,"标题","搜索标题的内容是什么呢？Lucene学习学习哈哈哈");      

      Documentdoc= LuceneUtils.javaBeanToDocument(art);

      IndexWriterindexWriter=newIndexWriter(LuceneUtils.getDirectory(), LuceneUtils.getAnalyzer(), LuceneUtils.getMaxFieldLength() );

      indexWriter.addDocument( doc);

      indexWriter.close();

  }

    @Test

    public void searchByKeyword ()throwsException{

        String keyword = "标题";    

        List<Article>list= newArrayList<Article>();

        IndexSearcherindexSearcher= newIndexSearcher(LuceneUtils.getDirectory()); 

        QueryParserqueryParser= newQueryParser(LuceneUtils.getVersion(),"content", LuceneUtils.getAnalyzer());

        Query query = queryParser.parse( keyword);  

        TopDocs topDocs = indexSearcher.search( query, 100);

        //格式对象

        Formatterformatter= newSimpleHTMLFormatter("<font color='red'>","</font>" );

       //关键字对象

        Scorerscorer= newQueryScorer(query);

       //高亮对象

        Highlighterhighlighter= newHighlighter(formatter,scorer);

          

        for( int i=0; i< topDocs. scoreDocs. length; i++){

           ScoreDocscoreDoc=  topDocs.scoreDocs[i];

           int no = scoreDoc. doc;

           Documentdoc= indexSearcher.doc(no);

           //关键字高亮

           StringtitleHighlighter= highlighter.getBestFragment(LuceneUtils.getAnalyzer(),"title",doc.get("title"));

          StringcontentHighlighter= highlighter.getBestFragment(LuceneUtils.getAnalyzer(),"content",doc.get("content"));

         //System.out.println(contentHighlighter+"....");

         //将高亮后结果封装回document对象中

          doc.getField("title").setValue(titleHighlighter);

          doc.getField("content").setValue(contentHighlighter);

           Articlearticle= (Article) LuceneUtils.documentToJavaBean(doc, Article.class);       

           list.add( article);

        }

        for(Article a : list){

            System.out.println(a);

        }

  }

}