Lucene6.0 建立索引及查詢text簡單實例

1.pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>hui</groupId>
	<artifactId>Lucene</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>Lucene</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
		</dependency>


		<dependency>
			<groupId>org.apache.lucene</groupId>
			<artifactId>lucene-core</artifactId>
			<version>6.0.0</version>
		</dependency>

		<dependency>
			<groupId>org.apache.lucene</groupId>
			<artifactId>lucene-analyzers-common</artifactId>
			<version>6.0.0</version>
		</dependency>

		<dependency>
			<groupId>org.apache.lucene</groupId>
			<artifactId>lucene-queryparser</artifactId>
			<version>6.0.0</version>
		</dependency>

		<dependency>
			<groupId>org.apache.lucene</groupId>
			<artifactId>lucene-highlighter</artifactId>
			<version>6.0.0</version>
		</dependency>

	</dependencies>
</project>

2.LuceneTest.java:

package luceneTest;

import java.io.IOException;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.queryparser.classic.ParseException;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;

public class TextTest {
	public static void main(String[] args) throws IOException, ParseException {
		Analyzer analyzer = new StandardAnalyzer();

		// Store the index in memory:
		Directory directory = new RAMDirectory();
		// To store an index on disk, use this instead:
		// Directory directory = FSDirectory.open("/tmp/testindex");

		IndexWriterConfig config = new IndexWriterConfig(analyzer);
		IndexWriter writer = new IndexWriter(directory, config);

		String[] texts = new String[] { "This is the text to be indexed",
				"That is an cat", "he is shit", "stupid women,so bitch" };
		for (String text : texts) {
			Document doc = new Document();
			doc.add(new Field("fieldname", text, TextField.TYPE_STORED));
			writer.addDocument(doc);
		}

		writer.close();

		// Now search the index:
		DirectoryReader reader = DirectoryReader.open(directory);
		IndexSearcher searcher = new IndexSearcher(reader);

		QueryParser parser = new QueryParser("fieldname", analyzer);

		Query query = parser.parse("stupid");
		// if you parse("the")，then hits.length=0,because "the" is
		// stopWord,others like "to" "be",also stopWord
		ScoreDoc[] hits = searcher.search(query, 5).scoreDocs;
		System.out.println(hits.length);

		// Iterate through the results:
		for (int i = 0; i < hits.length; i++) {
			Document hitDoc = searcher.doc(hits[i].doc);
			System.out.println(hitDoc.get("fieldname"));
		}
		reader.close();
		directory.close();
	}

}