lucene的索引建立及查找_如何判断lucene索引成功-优快云博客

本文链接：https://blog.youkuaiyun.com/kuno321/article/details/6520817

本文通过Java代码示例介绍了如何使用Apache Lucene创建文档索引，并演示了如何进行简单查询。示例中创建了两个包含特定字段的文档，并设置最大字段长度限制。之后通过查询解析器进行搜索并打印出结果。

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Java代码

package lucene;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.FSDirectory;
public class FSDirectoryTest {
//建立索引的路径
public static final String path = "f://index2";
public static void main(String[] args) throws Exception {
Document doc1 = new Document();
doc1.add(new Field("name", "lighter javaeye com", Field.Store.YES, Field.Index.TOKENIZED));
Document doc2 = new Document();
doc2.add(new Field("name", "lighter blog", Field.Store.YES, Field.Index.TOKENIZED));
IndexWriter writer = new IndexWriter(FSDirectory.getDirectory(path, true), new StandardAnalyzer(), true);
writer.setMaxFieldLength(3);
writer.addDocument(doc1);
writer.setMaxFieldLength(3);
writer.addDocument(doc2);
writer.close();
IndexSearcher searcher = new IndexSearcher(path);
Hits hits = null;
Query query = null;
QueryParser qp = new QueryParser("name", new StandardAnalyzer());
query = qp.parse("lighter");
hits = searcher.search(query);
System.out.println("查找/"lighter/" 共" + hits.length() + "个结果");
Document doc = null;
for (int i = 0; i < hits.length(); i++) {
doc = hits.doc(i);
System.out.println(doc.get("name"));
doc = null;
}
query = qp.parse("javaeye");
hits = searcher.search(query);
System.out.println("查找/"javaeye/" 共" + hits.length() + "个结果");
}
}


package lucene;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.FSDirectory;

public class FSDirectoryTest {

	//建立索引的路径   
	public static final String path = "f://index2";

	public static void main(String[] args) throws Exception {
		Document doc1 = new Document();
		doc1.add(new Field("name", "lighter javaeye com", Field.Store.YES, Field.Index.TOKENIZED));

		Document doc2 = new Document();
		doc2.add(new Field("name", "lighter blog", Field.Store.YES, Field.Index.TOKENIZED));

		IndexWriter writer = new IndexWriter(FSDirectory.getDirectory(path, true), new StandardAnalyzer(), true);
		writer.setMaxFieldLength(3);
		writer.addDocument(doc1);
		writer.setMaxFieldLength(3);
		writer.addDocument(doc2);
		writer.close();

		IndexSearcher searcher = new IndexSearcher(path);
		Hits hits = null;
		Query query = null;
		QueryParser qp = new QueryParser("name", new StandardAnalyzer());

		query = qp.parse("lighter");
		hits = searcher.search(query);
		System.out.println("查找/"lighter/" 共" + hits.length() + "个结果");

		Document doc = null;
		for (int i = 0; i < hits.length(); i++) {
			doc = hits.doc(i);
			System.out.println(doc.get("name"));
			doc = null;
		}

		query = qp.parse("javaeye");
		hits = searcher.search(query);
		System.out.println("查找/"javaeye/" 共" + hits.length() + "个结果");

	}

}

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