lucene3.0 CRUD范例（三）

package com.wj.lucene;

import java.io.File;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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.index.Term;
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.SimpleFSDirectory;
import org.apache.lucene.util.Version;

/**
 * Lucene3.0 CRUD操作
 * 更能如下：
 * 追加、查询所有、删除索引
 * 
 * @author jcom
 * @date 2010-9-28
 *
 */
public class zjIndex
{
	private static final Log LOGGER = LogFactory.getLog(zjIndex.class);
			
	private static String path = "c:/index";
	
	private static Directory dir = null;
	
	public static void main(String[] args) throws Exception
	{
		dir = new SimpleFSDirectory(new File(path)); 
		
		//追加数据
		superAdditionIndex();
		
		//查询输出所有数据
		searchAll();
		
		//删除
		deleteIndex();
	}


	/**
	 * 追加数据
	 */
	public static void superAdditionIndex()
	{
		System.out.println("追加开始==============");
		try
		{
			IndexWriter write = new IndexWriter(dir, new StandardAnalyzer(
					Version.LUCENE_30), false,
					IndexWriter.MaxFieldLength.UNLIMITED);
			
			Document doc = new Document();
			doc.add(new Field("id", "234567", Field.Store.YES,
					Field.Index.NOT_ANALYZED));
			doc.add(new Field("userName", "王二", Field.Store.YES,
					Field.Index.ANALYZED));
			doc.add(new Field("comefrom", "南京", Field.Store.YES,
					Field.Index.ANALYZED));
			
			Term term = new Term("id", "234567");
			/**
			 * 调用updateDocument的方法，传给它一个新的doc来更新数据， 
			 * Term term = new Term("id","234567");
			 * 先去索引文件里查找id为234567的Doc,如果有就更新它(如果有多条，最后更新后只有一条)。如果没有就新增.
			 * 
			 * 数据库更新的时候，我们可以只针对某个列来更新，而lucene只能针对一行数据更新。
			 */
			write.updateDocument(term, doc);
			
			write.commit();
			write.close();
		} 
		catch (Exception e)
		{
			LOGGER.info(e.getMessage());
		}
		System.out.println("追加王二成功==========");
		System.out.println("追加结束==============\n");
	}