lucene最基本的入门例子

javadragon — Mon, 21 Jan 2008 13:02:00 GMT

最近开始搞下lucene,用空闲时间深入学习lucene的使用，希望今后能有所收获，呵呵。。.现在写的这个例子，是参考官方文档写的，写这些东西只是为了自己所走过的路，同时也非常希望得到各位兄弟的指点，让小弟少走点弯路

package test;

import java.io.IOException;

import org.apache.lucene.analysis.SimpleAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.queryParser.ParseException;
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.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.LockObtainFailedException;
import org.junit.Before;
import org.junit.Test;

/**
* @author dragon
*
*/
public class TestBase {

    private String path;

    @Before
    public void init(){
        path = "/home/dragon/application/mywork/lucenetest/index";
    }


//    @Test     // 创建索引文件
    public void writerContent() throws CorruptIndexException, LockObtainFailedException, IOException{
         // IndexWriter的第三个参数为false时，则在已有的索引文件追加内容
        IndexWriter writer = new IndexWriter(path, new SimpleAnalyzer(), true);


        Document doc = new Document();
        String text = "Figure out which ClassLoader to use. For JDK 1.2 and later use the";
        doc.add(new Field("content", text, Field.Store.YES, Field.Index.TOKENIZED));

        Document doc2 = new Document();
        String text2 = "context ClassLoader if possible. Note: we defer linking the class";
        doc.add(new Field("content", text2, Field.Store.YES, Field.Index.TOKENIZED));

        Document doc3 = new Document();
        String text3 = "that calls an API only in JDK 1.2 until runtime so that we can catch";
        doc.add(new Field("content", text3, Field.Store.YES, Field.Index.TOKENIZED));

        writer.addDocument(doc);
        writer.addDocument(doc2);
        writer.addDocument(doc3);

        writer.optimize();
        writer.close();

    }

    @Test   // 搜索包含关键字key的内容
    public void searchContent() throws IOException, ParseException{
        Directory directory = FSDirectory.getDirectory(path);
        IndexSearcher search = new IndexSearcher(directory);

        String key = "use";
        QueryParser parser = new QueryParser("content",new SimpleAnalyzer());
        Query query = parser.parse(key);

        Hits hits = search.search(query);

        for(int i = 0; i < hits.length(); i++){
            Document doc = hits.doc(i);
            System.out.println(" 查询结果 : "+ doc.get("content"));
        }

        search.close();
        directory.close();

    }

}

javadragon 2008-01-21 21:02 发表评论

BlogJava-dragon-随笔分类-lucene

lucene最基本的入门例子