Lucene索引创建之域选项介绍，Field.Store和Fiele.Index

基于jar lucene3.6.2

Field.Store.YES / NO  ---  存储选项

设置为YES表示把这个域中的内容完全存储到文件中，方便进行文本的还原

设置为NO表示把这个域的内容不存储到文件中，但是可以被索引，此时内容无法完全还原

Field.Index.  --- 索引选项

ANALYZED  进行分词和索引，适用于标题，内容等

NOT_ANALYZED  进行索引，但不进行分词，适用于精确搜索

ANALYZED_NOT_NORMS 进行分词但是不存储norms信息，这个norms中包括了创建索引的时间和全职等信息

NOT_ANALYZED_NOT_NORMS 既不进行分词也不存储norms信息

NO 不进行索引

下面直接通过例子说明问题

IndexUtil.java 
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 = {"soukenan@qq.com","li@soukenan.com","804632564@qq.com","admin@qq.com","soukenan@kenan.org","123@df.com"}; 
    private String[] content ={ 
            "Welcome to my home", 
            "Hello Kenan", 
            "Good morning", 
            "Are you OK?", 
            "Yeah hahahahahahaha", 
            "I like foot ball" 
    }; 
    private int[] attachs = {1,4,6,2,3,8}; 
    private String[] names = {"zhangsan","kenan","soukenan","Micheal","Liangchengpeng","Jah"}; 
    //词典  
    private Directory directory = null; 
    //写入笔 
    private IndexWriter writer = null; 
    //文档对象 
    private Document doc = null; 
    //读取对象 
    private IndexReader reader = null; 
    public IndexUtil(){ 
        try { 
            this.directory = FSDirectory.open(new File("d:/lucene/index02")); 
        } catch (IOException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        } 
    } 
    /** 
     * 构建索引 
     */ 
    public void buildIndex(){ 
        try { 
            writer = new IndexWriter(directory, new IndexWriterConfig(Version.LUCENE_35, new StandardAnalyzer(Version.LUCENE_36))); 
            for(int i=0;i<6;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",this.content[i],Field.Store.NO,Field.Index.ANALYZED)); 
                doc.add(new Field("name",this.names[i],Field.Store.YES,Field.Index.NOT_ANALYZED_NO_NORMS)); 
                writer.addDocument(doc); 
            } 
        } catch (CorruptIndexException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        } catch (LockObtainFailedException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        } catch (IOException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        }finally{ 
            if(writer != null ){ 
                try { 
                    writer.close(); 
                } catch (CorruptIndexException e) { 
                    // TODO Auto-generated catch block 
                    e.printStackTrace(); 
                } catch (IOException e) { 
                    // TODO Auto-generated catch block 
                    e.printStackTrace(); 
                } 
            } 
        } 
         
    } 
    public void query(){ 
        try { 
            this.reader = IndexReader.open(directory); 
            System.out.println("maxDoc:"+reader.maxDoc()); 
            System.out.println("numDocs:"+reader.numDocs()); 
             
        } catch (CorruptIndexException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        } catch (IOException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        } 
    } 
} 
测试类 TestCase.java 
import static org.junit.Assert.*; 
 
import org.junit.BeforeClass; 
import org.junit.Test; 
 
 
public class TestCase { 
 
    @BeforeClass 
    public static void setUpBeforeClass() throws Exception { 
    } 
 
    @Test 
    public void testBuildIndex() { 
        new IndexUtil().buildIndex(); 
    } 
    @Test 
    public void testQuery(){ 
        new IndexUtil().query(); 
    } 
 
} 

 
本文出自 “Kenan_ITBlog” 博客，请务必保留此出处http://soukenan.blog.51cto.com/5130995/1119923