public List<LuceneSearchResult> search(String keyword, boolean highlight, int size)
     throws IOException, ParseException {
   IndexReader reader = luceneIndex.reader();
   try {
     IndexSearcher searcher = new IndexSearcher(reader);
     Analyzer analyzer = new IKAnalyzer();
     MultiFieldQueryParser parser =
         new MultiFieldQueryParser(Version.LUCENE_4_9, fields, analyzer, boosts);
     // 将关键字包装成Query对象
     Query query = parser.parse(keyword);
     TopDocs results = searcher.search(query, size);
     FragListBuilder fragListBuilder = new SimpleFragListBuilder();
     FragmentsBuilder fragmentsBuilder =
         new ScoreOrderFragmentsBuilder(
             BaseFragmentsBuilder.COLORED_PRE_TAGS, BaseFragmentsBuilder.COLORED_POST_TAGS);
     FastVectorHighlighter fvh =
         new FastVectorHighlighter(true, true, fragListBuilder, fragmentsBuilder);
     FieldQuery fq = fvh.getFieldQuery(query);
     // System.out.println("命中--》" + results.totalHits);
     List<LuceneSearchResult> searchResults = new ArrayList<LuceneSearchResult>();
     for (ScoreDoc sd : results.scoreDocs) {
       // 当查询不到高亮信息时,返回内容为Null
       // String highContent = fvh.getBestFragment(fq, reader, sd.doc, "content", 100);
       // System.out.println("highContent-->" + highContent);
       String highTitle = null;
       if (highlight) {
         fvh.getBestFragment(fq, reader, sd.doc, "title", 100);
         if (highTitle == null) {
           Document doc = searcher.doc(sd.doc);
           /** 如果高亮内容为null,那么表示标题没有需要高亮的内容,那么赋值为原有标题 */
           highTitle = doc.get("title");
         }
       } else {
         highTitle = searcher.doc(sd.doc).get("title");
       }
       String id = searcher.doc(sd.doc).get("id");
       searchResults.add(new LuceneSearchResult(id, highTitle));
     }
     return searchResults;
   } finally {
     reader.close();
   }
 }
 public void close() throws IOException {
   if (luceneIndex != null) luceneIndex.close();
 }