Lucene的增删改查的操作

@Testpublic void saveIndex() throws Exception{File file = new File(indexPath);FSDirectory dir = FSDirectory.getDirectory(file);Document doc = File2DocumentUtils.file2Document(filePath);IndexWriter indexWriter = new IndexWriter(dir, analyzer, MaxFieldLength.LIMITED);indexWriter.addDocument(doc);indexWriter.close();}@Testpublic void deleteIndex() throws Exception{IndexWriter indexWriter = new IndexWriter(indexPath, analyzer, MaxFieldLength.LIMITED);Term term = new Term("path", filePath);indexWriter.deleteDocuments(term);indexWriter.close();}@Testpublic void updateIndex() throws Exception{IndexWriter indexWriter = new IndexWriter(indexPath, analyzer, MaxFieldLength.LIMITED);Term term = new Term("path", filePath);Document doc = File2DocumentUtils.file2Document(filePath);//正直的更新是先删除在添加indexWriter.updateDocument(term, doc);indexWriter.close();}@Testpublic void searchIndex() throws Exception{String queryString = "笑话";// 把要搜索的文本解析成QueryString[] fields = {"name", "content"};QueryParser queryParser = new MultiFieldQueryParser(fields, analyzer);Query query = queryParser.parse(queryString);// 进行查询IndexSearcher indexSearcher = new IndexSearcher(indexPath);Filter filter = null;// 相当于一个List集合TopDocs topDocs = indexSearcher.search(query, filter, 10000);int firstResult = 0;int max = 3;int end = Math.min(firstResult+max, topDocs.totalHits);// 打印结果for (int i=firstResult; i<end;i++){ScoreDoc scoreDoc = topDocs.scoreDocs[i];int docSn = scoreDoc.doc;// 文档内部编号Document doc = indexSearcher.doc(docSn); // 根据编号取出相应的文档File2DocumentUtils.printDocumentInfo(doc);}System.out.println("总共有[" + topDocs.totalHits + "]条匹配结果");}

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