检索结果高亮对于用户的体验度和友好度非常重要，可以快速标记出用户检索对关键词。本例中的索引仍使用上一篇博客（）中创建的索引，代码高亮参考了。

实现效果：

核心代码

package ucas.ir.lucene;import java.io.File;import java.io.IOException;import javax.print.Doc;import org.apache.lucene.analysis.Analyzer;import org.apache.lucene.analysis.TokenStream;import org.apache.lucene.analysis.core.KeywordAnalyzer;import org.apache.lucene.analysis.standard.StandardAnalyzer;import org.apache.lucene.document.Document;import org.apache.lucene.index.DirectoryReader;import org.apache.lucene.index.IndexWriter;import org.apache.lucene.queryparser.classic.QueryParser;import org.apache.lucene.search.IndexSearcher;import org.apache.lucene.search.Query;import org.apache.lucene.search.TopDocs;import org.apache.lucene.search.highlight.Fragmenter;import org.apache.lucene.search.highlight.Highlighter;import org.apache.lucene.search.highlight.QueryScorer;import org.apache.lucene.search.highlight.SimpleHTMLFormatter;import org.apache.lucene.search.highlight.SimpleSpanFragmenter;import org.apache.lucene.search.highlight.TokenSources;import org.apache.lucene.store.Directory;import org.apache.lucene.store.FSDirectory;import org.apache.lucene.util.Version;import org.wltea.analyzer.lucene.IKAnalyzer;public class IndexSearch {    public static void main(String[] args) {        Directory directory = null;        try {            File indexpath = new File("/Users/yp/Documents/workspace/UCASIR/WebContent/index");            if (indexpath.exists() != true) {                indexpath.mkdirs();            }            // 设置要查询的索引目录            directory = FSDirectory.open(indexpath);            // 创建indexSearcher            DirectoryReader dReader = DirectoryReader.open(directory);            IndexSearcher searcher = new IndexSearcher(dReader);            // 设置分词方式            Analyzer analyze2 = new StandardAnalyzer(Version.LUCENE_43);// 标准分词            Analyzer analyzer = new IKAnalyzer();            // 设置查询域            String field="news_title";            QueryParser parser = new QueryParser(Version.LUCENE_43, field, analyzer);            // 查询字符串            Query query = parser.parse("阿法狗");            QueryScorer scorer=new QueryScorer(query,field);            SimpleHTMLFormatter fors=new SimpleHTMLFormatter("", "");            Highlighter highlighter=new Highlighter(fors, scorer);            System.out.println("query:" + query.toString());            // 返回前10条            TopDocs topDocs = searcher.search(query, 10);            if (topDocs != null) {                System.out.println("符合条件第文档总数：" + topDocs.totalHits);                for (int i = 0; i < topDocs.scoreDocs.length; i++) {
                         Document doc = searcher.doc(topDocs.scoreDocs[i].doc);                    TokenStream tokenStream=TokenSources.getAnyTokenStream(searcher.getIndexReader(), topDocs.scoreDocs[i].doc, field, analyzer);                    Fragmenter  fragment=new SimpleSpanFragmenter(scorer);                    highlighter.setTextFragmenter(fragment);                     //高亮news_title域                    String str=highlighter.getBestFragment(tokenStream, doc.get("news_title"));//获取高亮的片段，可以对其数量进行限制                      System.out.println("高亮title："+str);                    tokenStream=TokenSources.getAnyTokenStream(searcher.getIndexReader(), topDocs.scoreDocs[i].doc, "news_summary", analyzer);                    str=highlighter.getBestFragment(tokenStream, doc.get("news_summary"));//获取高亮的片段，可以对其数量进行限制                      System.out.println("高亮summary："+str);                }            }            directory.close();            dReader.close();        } catch (Exception e) {            e.printStackTrace();        }    }}

结果：