利用Lucene的IndexWriter建立索引(详解)
/*
* 建立索引，然后把建立后的文档添加到索引中去
* 提示先使用Document和Field把Field加入到Document中去，
* 接着把Document建立成为一个索引
* */
package comThree;
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.IndexWriter;
public class BookIndex{
//创建索引的目录
private String INDEX_PATH = "E:\\Lucene项目\\索引目录";
Document bookdoc1 = null;
public BookIndex(){
bookdoc1 = new Document();
System.out.println("开始创建书的Field字段---------->>>>");
//书的编号
Field bookNo = new Field("booknumber", "FB309663004", Field.Store.YES, Field.Index.TOKENIZED);
//书名
Field bookName = new Field("bookName", "钢铁是怎样炼成的", Field.Store.YES, Field.Index.TOKENIZED );
//书的作者
Field anthor = new Field("author", "匿名", Field.Store.YES, Field.Index.TOKENIZED);
//出版日期
Field publishdate = new Field("publishdate", "出版日期", Field.Store.YES, Field.Index.NO);
//描述
Field bookabstract = new Field("abstract", "钢铁是怎样炼成的", Field.Store.NO, Field.Index.TOKENIZED);
//价格
Field price = new Field("price", "25.00", Field.Store.YES, Field.Index.NO);
System.out.println("完成创建书的Field字段---------->>>>");
System.out.println("开始将书的字段放入到文档中-------------》》");
//把Field加入Document
bookdoc1.add(bookNo);
bookdoc1.add(bookName);
bookdoc1.add(bookabstract);
bookdoc1.add(publishdate);
bookdoc1.add(price);
System.out.println("完成书的字段放入到文档中------------->>>>>");
try{
System.out.println("开始创建索引-------------------->>>>");
//创建索引实例
IndexWriter writer = new IndexWriter(INDEX_PATH, new StandardAnalyzer());
//构建一个indexWriter的实例
writer.addDocument(bookdoc1);
//在这里必须要关闭，否则会出现异常，例如数据没有写入完整。
writer.close();
System.out.println("完成索引的创建并且存储完毕， 索引的存放位置在：" + INDEX_PATH);
}catch(IOException e){
e.printStackTrace();
}
}
public static void main(String[] args){
BookIndex BI = new BookIndex();
}
}
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