lucene内容创建查询Demo

package com.wj.lucene;

import java.io.File;
import java.util.*;
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.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
 * 
 * @author jcom
 * @date 2010-9-28
 *
 */
public class CreateAndSearcherIndex {

	public static void main(String[] args) throws Exception
	{
		// 保存索引文件的地方
		String indexDir = "D:\\MOST\\data\\test\\indexDir";

		// 创建Directory对象
		Directory dir = new SimpleFSDirectory(new File(indexDir));  

		/**
		 * 创建IndexWriter对象, 
		 * 第一个参数是Directory, 
		 * 第二个是分词器,
		 * 第三个表示是否是创建, 如果为false为在此基础上面修改, 
		 * 第四表示表示分词的最大值，比如说new MaxFieldLength(2)，就表示两个字一分，一般用IndexWriter.MaxFieldLength.LIMITED
		 */
		IndexWriter indexWriter = new IndexWriter(dir, new StandardAnalyzer(
				Version.LUCENE_30), true, IndexWriter.MaxFieldLength.UNLIMITED);

		//准备加入索引的內容
		Map<String, String> maps = new HashMap<String, String>();
		maps.put("col1", "east");
		maps.put("col2", "south");
		maps.put("col3", "west");
		maps.put("col4", "north");
		maps.put("col5", "center");

		/*
		 * 遍历键，通过键取值
		 * 循环创建加入
		 */
		Set set = maps.keySet();
		for (Object key : set) {

			String keyvalue = key.toString();
			String value = maps.get(key);
			System.out.println("键:" + keyvalue + "  值:" + value);

			Document doc = new Document();
			doc.add(new Field(keyvalue, value, Field.Store.YES,
					Field.Index.NOT_ANALYZED));
			indexWriter.addDocument(doc);
		}

		//提交关闭
		indexWriter.commit();
		indexWriter.close(); 


		/**
		 * 搜索指定内容的字符串		
		 */
        IndexSearcher indexSearch = new IndexSearcher(dir);   
        QueryParser queryParser = new QueryParser(Version.LUCENE_30, "col5",   
                new StandardAnalyzer(Version.LUCENE_30));   
        //指定查询内容
        Query query = queryParser.parse("center");   
        TopDocs hits = indexSearch.search(query, 20);

        System.out.println("一共找到:" + hits.totalHits + "条");   

        for (int i = 0; i < hits.scoreDocs.length; i++) 
        {   
            ScoreDoc sdoc = hits.scoreDocs[i];   
            Document doc = indexSearch.doc(sdoc.doc);   
            System.out.println("搜索的内容为:"+doc.get("col5"));   
        }

        indexSearch.close(); 

	}
}