lucene 施用

lucene 应用

lucene 应用

lucenedto 类 用于区分

 

 

增加索引：

储存文件

 

File indexFile = new File(indexDirPath + "/" + entity.getUrlType());

indexFile.mkdirs();

if (!indexFile.exists()) {

try {

indexFile.createNewFile();

} catch (IOException e) {

e.printStackTrace();

return false;

}

}

 

 

创建　Ｄｉｒｅｃｔｏｒｙ　

 

Directory directory = null;

directory = new SimpleFSDirectory(indexFile);

 

索引配置：IndexWriterConfig indexWriterConfig = new IndexWriterConfig(

Version.LUCENE_30, analyzer);

 

创建索引模式：CREATE，覆盖模式； APPEND，追加模式

 

 

indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.CREATE);

indexWriterConfig.setOpenMode(IndexWriterConfig.OpenMode.APPEND);

 

 

始化创建器

indexWriter = new IndexWriter(directory, indexWriterConfig);

 

增加Document

Document doc = new Document();

 

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));

 

 

写入

indexWriter.addDocument(doc);

更新

Term term = new Term("id", entity.getUserID());

indexWriter.updateDocument(term, doc);

 

关闭

indexWriter.close();

 

 

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();

 

查询检索

File indexFile = new File(indexDirPath + "/" +fileName);

打开

Directory dir = FSDirectory.open(indexFile);

IndexSearcher indexSearcher = new IndexSearcher(dir);