lucene 应用
lucene 应用
lucenedto 类 用于区分
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增加索引：
储存文件
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File indexFile = new File(indexDirPath + "/" + entity.getUrlType());
indexFile.mkdirs();
if (!indexFile.exists()) {
try {
indexFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
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创建 Ｄｉｒｅｃｔｏｒｙ
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Directory directory = null;
directory = new SimpleFSDirectory(indexFile);
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索引配置：IndexWriterConfig indexWriterConfig = new IndexWriterConfig(
Version.LUCENE_30, analyzer);
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创建索引模式：CREATE，覆盖模式； APPEND，追加模式
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indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.CREATE);
indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.APPEND);
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始化创建器
indexWriter = new IndexWriter(directory, indexWriterConfig);
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增加Document
Document doc = new Document();
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doc.add(new Field("userId", entity.getUserId(), Field.Store.YES,Field.Index.NOT_ANALYZED));
doc.add(new Field("url", url, Field.Store.YES,Field.Index.ANALYZED));
doc.add(new Field("title", title, Field.Store.YES,Field.Index.ANALYZED));
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写入
indexWriter.addDocument(doc);
更新
Term term = new Term("id", entity.getUserID());
indexWriter.updateDocument(term, doc);
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关闭
indexWriter.close();
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删除索引：
Directory directory;
directory = new SimpleFSDirectory(indexDir);
indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.CREATE_OR_APPEND);
indexWriter = new IndexWriter(directory, indexWriterConfig);
Term term = new Term("id", entity.getUserId?());
indexWriter.deleteDocuments(term);
关闭
indexWriter.close();
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查询检索
File indexFile = new File(indexDirPath + "/" +fileName);
打开
Directory dir = FSDirectory.open(indexFile);
IndexSearcher indexSearcher?= new IndexSearcher(dir);
indexSearcher.setSimilarity(new IKSimilarity());TopScoreDocCollector topCollector = TopScoreDocCollector.create(indexSearcher.maxDoc(), true);indexSearcher.search(query, filter, topCollector);hits = topCollector.topDocs().scoreDocs;命中数?totalHits = topCollector.getTotalHits();doc = indexSearcher.doc(hits[i].doc);?
