标签：java lucene4.10 indexWriter lucene 全文检索 add new document String
总结下如何使用lucene全文搜索
首先导入依赖
<!--核心包--> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-core</artifactId> <version>4.10.4</version> </dependency> <!--对分词索引查询解析--> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-queryparser</artifactId> <version>4.10.4</version> </dependency> <!--一般分词器，适用于英文分词--> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-analyzers-common</artifactId> <version>4.10.4</version> </dependency> <!--检索关键字高亮显示 --> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-highlighter</artifactId> <version>4.10.4</version> </dependency> <dependency> <groupId>com.janeluo</groupId> <artifactId>ikanalyzer</artifactId> <version>2012_u6</version> </dependency>
创建工具类LuceneUtil工具类
public class LuceneUtil {
private final static Logger logger = LoggerFactory.getLogger(LuceneUtil.class);
public static IndexWriter getIndexWriter(String mainLogsIndexDir) throws IOException {
Path path = Paths.get(mainLogsIndexDir);
File indexFile = path.toFile();
if(!indexFile.exists()) {
//如果文件夹不存在,则创建
indexFile.mkdirs();
}
FSDirectory fsDirectory = FSDirectory.open(indexFile);
IKAnalyzer ikAnalyzer = new IKAnalyzer();
IndexWriterConfig indexWriterConfig = new IndexWriterConfig(Version.LUCENE_4_10_4,ikAnalyzer);
IndexWriter indexWriter = new IndexWriter(fsDirectory, indexWriterConfig);
if(IndexWriter.isLocked(fsDirectory )){
indexWriter.close();
IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_4_10_4 , ikAnalyzer );
return new IndexWriter(fsDirectory, config);
}
return indexWriter;
}
public static IndexSearcher getIndexSearcher(String indexDirectory){
Path path = Paths.get(indexDirectory);
File file = path.toFile();
if (!file.exists()) {
//如果文件夹不存在,则创建
file.mkdirs();
}
try {
FSDirectory directory = FSDirectory.open(file);
IndexReader reader = DirectoryReader.open(directory);
return new IndexSearcher(reader);
} catch (IOException e) {
logger.error(e.getMessage(),e);
return null;
}
}
}添加文档到索引库
List<Document> docs = new ArrayList<>();
LineNumberReader lineNumberReader = new LineNumberReader(new FileReader(file));
String[] split = file.getName().split("\\.");
String name = split[0];
String line;
while ((line = lineNumberReader.readLine()) != null) {
int lineNumber = lineNumberReader.getLineNumber();
Document document = new Document();
document.add(new StringField("recordId", recordId, Field.Store.YES));
document.add(new StringField("subRecordId", subRecordId, Field.Store.YES));
document.add(new StringField("fileName", name, Field.Store.YES));
document.add(new LongField("lineNumber",lineNumber,Field.Store.YES));
document.add(new TextField("content",line, Field.Store.YES));
docs.add(document);
}
IndexWriter indexWriter = LuceneUtil.getIndexWriter(moduleLogsIndexDir);
indexWriter.addDocuments(docs);
indexWriter.close();
lineNumberReader.close();从索引库查询结果
IndexSearcher logsIndexSearcher = LuceneUtil.getIndexSearcher(logIndexDir);
// 总查询条件
BooleanQuery booleanQuery = new BooleanQuery();
// subrecordId
String subRecordId = logPageDTO.getSubRecordId();
booleanQuery.add(new TermQuery(new Term("subRecordId", subRecordId)), BooleanClause.Occur.MUST);
TopDocs topDocs = logsIndexSearcher.search(booleanQuery, querySize, sort);
ScoreDoc[] scoreDocs = topDocs.scoreDocs;
ScoreDoc lastScoreDoc;
int last = (pageNum - 1) * pageSize - 1;
// 查询第一页的时候scoreDoc传null
if (last < 0) {
lastScoreDoc = null;
} else {
lastScoreDoc = scoreDocs[last];
}
// 注意searchAfter与search的区别
topDocs = logsIndexSearcher.searchAfter(lastScoreDoc, booleanQuery, pageSize, sort);
List<LogItemVO> logItemList = new ArrayList<>();
scoreDocs = topDocs.scoreDocs;
for (ScoreDoc scoreDoc : scoreDocs) {
Document doc = logsIndexSearcher.doc(scoreDoc.doc);
LogItemVO logItemVO = new LogItemVO();
logItemVO.setFileName(doc.get("fileName"));
logItemVO.setLineNum(Long.parseLong(doc.get("lineNumber")));
logItemVO.setContent(doc.get("content"));
logItemList.add(logItemVO);
}
标签：java,lucene4.10,indexWriter,lucene,全文检索,add,new,document,String 来源： https://blog.51cto.com/u_13585440/2704220
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