lucence总结
lucence实现的两步
1.第一步先建立索引，其中先查询出来数据放到一个数组中
public class IndexerFile {
public static int indexFile(String indexDir, Music[] list) throws IOException {
//采用IKAnalyzer分词；
Analyzer analyzer = new IKAnalyzer();
IndexWriterConfig conf = new IndexWriterConfig(Version.LUCENE_36, analyzer);
conf.setOpenMode(IndexWriterConfig.OpenMode.CREATE);
IndexWriter writer = new IndexWriter(FSDirectory.open(new File(indexDir)), conf);
for (int i = 0; i < list.length; i++) {
Document doc = new Document();
doc.add(new Field("musicId", String.valueOf(list[i].getMusic_id()), Field.Store.YES, Field.Index.NO));
doc.add(new Field("description", list[i].getDescription(), Field.Store.YES, Field.Index.ANALYZED));
doc.add(new Field("userName", list[i].getUserName(), Field.Store.YES, Field.Index.ANALYZED));
doc.add(new Field("tag", list[i].getTag(), Field.Store.YES, Field.Index.ANALYZED));
}
int numIndexed = writer.maxDoc();
writer.forceMerge(1);
writer.close();
return numIndexed;
}
2.进行搜索
public class SearcherFile {
public static void search(String[] q) throws IOException, ParseException {
//采用IKAnalyzer分词；
Analyzer analyzer = new IKAnalyzer();
//采用标准分词器；
IndexSearcher searcher=null;
IndexReader reader = IndexReader.open(FSDirectory.open(new File(indexDir)));
searcher = new IndexSearcher(reader);
//Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_36);
String[] fields = {"title", "description", "tag", "userName"};
Query query = MultiFieldQueryParser.parse(Version.LUCENE_36, q, fields, analyzer);
TopDocs topDocs = searcher.search(query, 100);//100是显示队列的Size
ScoreDoc[] hits = topDocs.scoreDocs;
System.out.println("共有" + searcher.maxDoc() + "条索引，命中" + hits.length + "条");
SimpleHTMLFormatter simpleHTMLFormatter = new SimpleHTMLFormatter("<span>", "</span>");
Highlighter highlighter = new Highlighter(simpleHTMLFormatter, new QueryScorer(query));
for (int i = 0; i < hits.length; i++) {
int DocId = hits[i].doc;
Document document = searcher.doc(DocId);
//tokenStream()中第一个参数可以为空，具体不知道什么作用
TokenStream tokens = analyzer.tokenStream("",new StringReader(document.get("filename"))); // 7.根据searcher和ScordDoc对象获取具体的Document对象
System.out.println(highlighter.getBestFragment(tokens, document.get("filename")));
}
}
}