学习lucene一

索引的写入

• 需要了解的一些概念:

  • Analyzer分词器

  • IndexWriter索引写入

  • IndexWriterConfig索引写入配置

  • FieldType字IndexWriterConfig段类型

  • Field字段

  • Document文档

  • Directory目录

    @Test
    public void testWriter() throws Exception{
    //打开一个文件目录
    Directory d=FSDirectory.open(new File("writer"));
    //初始化词法分析器
    Analyzer analyzer=new SimpleAnalyzer();
    //初始化索引写入器配置
    IndexWriterConfig conf=new IndexWriterConfig(Version.LATEST, analyzer);
    //创建索引写入器
    IndexWriter writer =new IndexWriter(d, conf);
    //创建一个索引字段
    FieldType type=new FieldType();
    type.setStored(true);//是否存储
    type.setTokenized(true);//是否分词
    type.setIndexed(true);//是否创建索引
    Field field1=new Field("id","1",type) ;
    Field field2=new Field("title","i am title1",type) ;
    Field field3=new Field("content","hello java",type) ;
    //创建一个文档对象
    Document doc=new Document();
    doc.add(field1);
    doc.add(field2);
    doc.add(field3);
    Field field4=new Field("id","2",type) ;
    Field field5=new Field("title","i am title2",type) ;
    Field field6=new Field("content","hello lucene",type) ;
    //创建一个文档对象
    Document doc2=new Document();
    doc2.add(field4);
    doc2.add(field5);
    doc2.add(field6);
    writer.addDocument(doc);
    writer.addDocument(doc2);
    writer.commit();
    writer.close();
    }
    

##索引的读取

• 需要了解的一些概念
  • IndexReader索引读
  • IndexSeacher索引搜索