lucene 多字段查询+文字高亮显示

先创建索引，lucene3.0

Directory directory = null;
IndexSearcher isearcher = null;

Analyzer analyzer = new IKAnalyzer();

directory = new SimpleFSDirectory(new File("D:\data"));
isearcher = new IndexSearcher(directory);  //创建索引

//在索引器中使用IKSimilarity相似度评估器  分词器
  isearcher.setSimilarity(new IKSimilarity());

BooleanQuery bQuery = new BooleanQuery();  //组合查询

Query keywordQuery=null; 

BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,BooleanClause.Occur.SHOULD,BooleanClause.Occur.SHOULD};  //OR  或者

keywordQuery = MultiFieldQueryParser.parse(Version.LUCENE_30,word,new String[]{"Title","Descripe","Keywords"},flags,analyzer);  //多字段分词搜索

bQuery.add(keywordQuery, BooleanClause.Occur.MUST);  //AND

if(username=="ddddd"){
Query courseQuery = new QueryParser(Version.LUCENE_30, "CourseName",analyzer).parse(course);
 bQuery.add(courseQuery, BooleanClause.Occur.MUST);
}

//搜索相似度最高的5条记录
TopDocs topDocs = isearcher.search(bQuery , 500000);

//输出结果
  ScoreDoc[] scoreDocs = topDocs.scoreDocs;
//关键字高亮显示
Formatter formatter =  new SimpleHTMLFormatter("<font color=\"red\">", "</font>");   //前缀和后缀
Scorer scorer = new QueryScorer(bQuery);

Highlighter highlighter = new Highlighter(formatter, scorer);

highlighter.setTextFragmenter(new SimpleFragmenter(200)); //字长度
//高亮结束

for(int i=0;i<10;i++){
Document targetDoc = isearcher.doc(scoreDocs[i].doc);
	resourceIndex = new ResourceIndex();//存放的javabean
	String title="";
      title = highlighter.getBestFragment(analyzer, "Title", targetDoc.get("Title"));  //高亮显示标题
	if(title==null){
	 resourceIndex.setTitle(targetDoc.get("Title"));
	} else {
		resourceIndex.setTitle(title);
		}
	String Descripe = highlighter.getBestFragment(analyzer,
						"Descripe", targetDoc.get("Descripe"));
		if (Descripe == null) {
					resourceIndex.setDescripe(targetDoc.get("Descripe"));
				} else {
					resourceIndex.setDescripe(Descripe);
				}
   resourceIndex.setVersion(targetDoc.get("Version")); //如果不高亮显示则不判断

}

所需的包

评论

1 楼 lzzluo 2010-10-27  

学习了，谢谢lz