一、Lucene入门实例

package cn.lucene.tramp;  

import java.io.File;
import java.io.FileReader;
import java.io.IOException;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.LockObtainFailedException;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.Version;

/** 
 * ClassName:HelloLucene <br/> 
 * Function: TODO ADD FUNCTION. <br/> 
 * Reason:   TODO ADD REASON. <br/> 
 * Date:     2014年2月5日 下午12:59:10 <br/> 
 * @author   zhangzhaoyu 
 * @version   
 * @since    JDK 1.7
 * @see       
 */
public class HelloLucene {

	/**
	 * 
	 * index:<br />
	 * 建立索引
	 *
	 * @author zhangzhaoyu
	 */
	public void index() {
		IndexWriter writer = null;
		try {
			// 1. 创建 directory
			// Directory directory = new RAMDirectory(); // 建立在内存中
			Directory directory = FSDirectory.open(new File("E:\\BaiduYunDownload\\lucene\\index01"));
			// 2. 创建 IndexWriter
			IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_35, new StandardAnalyzer(Version.LUCENE_35));
			
			writer = new IndexWriter(directory, config);
			// 3. 创建Document 对象
			Document document = null;
			// 4. 为Document 添加Field
			File f = new File("E:\\BaiduYunDownload\\lucene\\example");
			System.out.println("filesize: " + f.listFiles().length);
			for (File file : f.listFiles()) {
				document = new Document();
				document.add(new Field("content", new FileReader(file)));
				document.add(new Field("filename", file.getName(), Field.Store.YES, Field.Index.NOT_ANALYZED));
				document.add(new Field("path", file.getAbsolutePath(), Field.Store.YES, Field.Index.NOT_ANALYZED));
				// 5. 通过IndexWriter 添加文档到索引中
				writer.addDocument(document);
			}
			
		} catch (CorruptIndexException e) {
			e.printStackTrace();
		} catch (LockObtainFailedException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (writer != null) {
				try {
					writer.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
	
	/**
	 * 
	 * searcher:<br />
	 * 搜索
	 *
	 * @author zhangzhaoyu
	 */
	public void searcher() {
		try {
			// 1. 创建 Directory
			Directory directory = FSDirectory.open(new File("E:\\BaiduYunDownload\\lucene\\index01"));
			// 2. 创建 IndexReader
			IndexReader reader = IndexReader.open(directory);
			// 3. 根据 IndexReader 创建 IndexSearcher
			IndexSearcher searcher = new IndexSearcher(reader);
			// 4. 创建搜索的 Query
			// 创建parser 来确定搜索文件的内容，第二个参数表示搜索的域
			QueryParser parser = new QueryParser(Version.LUCENE_35, "content", new StandardAnalyzer(Version.LUCENE_35));
			// 创建 query, 表示搜索域为content中包含的java 文档
			Query query = parser.parse("dojo");
			// 5. 根据 searcher搜索并返回 TopDocs
			TopDocs topDocs = searcher.search(query, 10);
			// 6. 根据 TopDocs 获取 SocreDoc 对象
			ScoreDoc[] sds = topDocs.scoreDocs;
			
			for (ScoreDoc sd : sds) {
				// 7. 根据 searcher 和 SocreDoc对象获取具体的 Document对象
				Document d = searcher.doc(sd.doc);
				// 8. 根据 Document 对象获取需要的值
				System.out.println(d.get("filename") + ": " + d.get("path"));
			}
			
		} catch (CorruptIndexException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

}
 

public class TestLucene {

	@Ignore
	public void testIndex() {
		HelloLucene lucene = new HelloLucene();
		lucene.index();
	}
	
	@Test
	public void testSearch() {
		HelloLucene lucene = new HelloLucene();
		lucene.searcher();
	}

}