*lucene索引_创建_域选项

【索引建立步骤】

【创建Directory】

 

【创建writer】

【创建文档并添加索引】

文档和域的概念很重要

       文档相当于表中的每一条记录，域相当于表中的每一个字段。

【查询索引的基本信息】

使用IndexReader进行查询。

【实践】

附：

IndexUtil.java：

package cn.hk.index;

import java.io.File;
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.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.LockObtainFailedException;
import org.apache.lucene.util.Version;

public class IndexUtil {
    private String[] ids = {"1","2","3","4","5","6"};
    private String[] emails = {"aa@hk.arg","bb@hk.org","cc@hk.arg",
                               "dd@hk.org","ee@hk.org","ff@hk.org"};
    private String[] content = {
            "welcome to visited the space","hello boy","my name is aa","i like football",
            "I like football and I like Basketball too","I like movie and swim"
    };
    private int[] attachs = {2,3,1,4,5,5};
    private String[] names = {"zhangsan","lisi","john","mike","jetty","jake"};
    
    private Directory directory = null;
    
    public IndexUtil(){
        try {
            directory = FSDirectory.open(new File("d://lucene/index02"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    public void query(){
        try {
            IndexReader reader = IndexReader.open(directory);
            //通过reader可以获取文档的数量
            System.out.println("numDocs:" + reader.numDocs());
            System.out.println("maxDocs" + reader.maxDoc());
        } catch (CorruptIndexException e) {
            
            e.printStackTrace();
        } catch (IOException e) {
            
            e.printStackTrace();
        }
    }
    
    
    public void index(){
        IndexWriter writer = null;
        try {
            writer = new IndexWriter(directory,new IndexWriterConfig(Version.LUCENE_35, new StandardAnalyzer(Version.LUCENE_35)));
            Document doc = null;
            for(int i=0;i<ids.length;i++){
                doc = new Document();
                doc.add(new Field("id",ids[i],Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
                doc.add(new Field("email",emails[i],Field.Store.YES,Field.Index.NOT_ANALYZED));
                doc.add(new Field("content",content[i],Field.Store.NO,Field.Index.ANALYZED));
                doc.add(new Field("name",names[i],Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS));
                writer.addDocument(doc);
            }
        } catch (CorruptIndexException e) {
            e.printStackTrace();
        } catch (LockObtainFailedException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
                if(writer != null)
                    try {
                        writer.close();
                    } catch (CorruptIndexException e) {
                        
                        e.printStackTrace();
                    } catch (IOException e) {
                        
                        e.printStackTrace();
                    }
            
        }
    }

}

TestIndex.java：

package cn.hk.test;

import org.junit.Test;

import cn.hk.index.IndexUtil;

public class TestIndex {
    
    @Test
    public void testIndex(){
        IndexUtil iu = new IndexUtil();
        iu.index();
    }
    
    @Test
    public void testQuery(){
        IndexUtil iu = new IndexUtil();
        iu.query();
    }
}

index()运行结果：

query（）运行结果