lucene 使用示例

/**
 * Demo for simple use of lucene
 */
package Test;
import java.io.File;
import java.io.FileReader;
import java.io.Reader;
import java.util.Date;

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.index.IndexWriter;
import org.apache.lucene.search.*;
import org.apache.lucene.queryParser.QueryParser;


/**
 * @author sxch
 *
 */
public class LuceneTest {

	/**
	 * @param args
	 */
	public static void main(String[] args)throws Exception {
		// TODO Auto-generated method stub
		//被索引文件所在目录
		File fileDir = new File("F:\\Works\\JWork\\LuceneTest\\soucefile");

		//索引文件存放目录
		File indexDir = new File("indexfile");

		Analyzer luceneAnalyzer = new StandardAnalyzer();
		IndexWriter indexWriter = new IndexWriter(indexDir,luceneAnalyzer,true);
		File[] textFiles = fileDir.listFiles();
		long startTime = new Date().getTime();

		for(int i =0 ; i < textFiles.length; i++)
		{
			if(textFiles[i].isFile() && textFiles[i].getName().endsWith(".txt"))
			{
				System.out.println("File "+ textFiles[i].getCanonicalPath() + " is being indexed !");
				Reader textReader = new FileReader(textFiles[i]);
				//新建一个文档
				Document document = new Document();
				//文档中放入内容字段
				document.add(new Field("content",textReader));;
				//文档中放入路径字段
				document.add(new Field("path",textFiles[i].getPath(),Field.Store.YES,Field.Index.TOKENIZED));

				//添加索引
				indexWriter.addDocument(document);


			}
		}
		//优化索引
		indexWriter.optimize();
		indexWriter.close();

		//索引完成，查询

		//Query query = new TermQuery(new Term("content","world"));
		IndexSearcher searcher = new IndexSearcher("indexfile");

		Hits hits = null;
		Query query = null;

		//查询解析器，建立在content字段
		QueryParser qp = new QueryParser("content",new StandardAnalyzer());
		//在content字段查询关键字hello
		query =qp.parse("hello");

		//查询
		hits = searcher.search(query);
		//输出查询结果综述
		System.out.println(hits.length());
		//输出查询结果的路径及文件名
		for (int i = 0; i < hits.length(); i++) {
			System.out.println(hits.doc(i).getField("path"));	
		}


	}

}