lucene是什么？ 是一个全文搜索框架，而不是应用产品。因此它并不像baidu和google那么拿来就能用，它是提供了一种工具让你能实现这些产品。 倒排索引：不是由记录来确定属性值，而是由属性值来确定记录的位置。 // 建立索引 public class CreateIndex { public static final String indexDir = "G:/index"; public static final String dataDir = "G:/data"; public void createIndex() { Directory dir = FSDirectory.open(new File(indexDir)); Analyzer anlyzer = new StandardAnlyzer(Version.LUNCENE_4_9); IndexWriteConfig config = new IndexWriteConfig(Version.LUNCENE_4_9); config.setOpenModel(IndexWriteConfig.OpenMode.CREATE_OR_APPEND); IndexWrite write = new IndexWrite(dir, config); File file = new File(dataDier); File[] files = file.listFile(); for (File f : files) { Document doc = new Document(); doc.add(new StringField("filename", f.getName(), Field.Store.YES)); doc.add(new TextField("content", FileUtils.readFileToString(f), Field.Store.YES)); doc.add(new LongField("lastModify", f.lastModify(), Field.Store.YES)); write.addDocument(doc); } write.close(); } } //查询 public class SearchIndex { public void search() { Directory dir = FSDirectory.open(new File(CreateIndex.indexDir)); IndexReader reader = DirectoryReader.open(dir); IndexSearcher searcher = new IndexSearcher(reader); QueryParser qp = new QueryParser(Version.LUNCENE_4_9, "content", new StandardAnalyzer(Version.LUNCENE_4_9)); Query query = qp.Query("java"); TopDocs search = searcher.search(query, 10); ScoreDoc[] scoreDocs = search.scoreDocs; for (ScoreDoc sc : scoreDocs) { int docId = sc.doc; Document document = reader.document(docId); System.out.println(document.get("filename")); } } }
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