/*前面学习了创建索引的方法是IndexWriter，这里所使用的是读取所创建的* 索引的方法IndexReader.* 和他的子类* MultiReader* */package indexReader;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;import org.apache.lucene.index.MultiReader;import org.apache.lucene.index.Term;import org.apache.lucene.index.TermDocs;public class IndexReader{private String INDEX_STORE_PATH = "E:\\Lucene项目\\目标文件";IndexWriter writer = null;org.apache.lucene.index.IndexReader reader = null;public IndexReader(){try{//创建索引writer = new IndexWriter(INDEX_STORE_PATH, new StandardAnalyzer(), true);writer.setUseCompoundFile(false);Document doc1 = new Document();Document doc2 = new Document();Document doc3 = new Document();Field f1 = new Field("bookname", "钢铁是怎样炼成的", Field.Store.YES, Field.Index.TOKENIZED);Field f2 = new Field("bookname", "英雄儿女", Field.Store.YES, Field.Index.TOKENIZED);Field f3 = new Field("bookname", "篱笆女人和狗", Field.Store.YES, Field.Index.TOKENIZED);doc1.add(f1);doc2.add(f2);doc3.add(f3);writer.addDocument(doc1);writer.addDocument(doc2);writer.addDocument(doc3);writer.close();//使用IndexReader读取索引reader = MultiReader.open(INDEX_STORE_PATH);System.out.println("索引文档列表 : ");for(int i = 0; i < reader.numDocs(); i++){System.out.println(reader.document(i));}//输出当前索引的版本信息System.out.println("索引版本： " + reader.getVersion());//输出当前的索引文件的数量System.out.println("索引的文本数量： " + reader.numDocs());//构造一个词条并在索引中查找System.out.println("============================");System.out.println("查找词条女———->开始查找");Term term1 = new Term("bookname", "女");TermDocs docs = reader.termDocs(term1);while(docs.next()){System.out.println("———查找中————");System.out.println("含有查找的<"+ term1 +">的Document的编号为" + docs.doc());System.out.println("Term在文档中出现的次数" + docs.freq());System.out.println("—————————-");}reader.close();}catch(IOException e){e.printStackTrace();}}public static void main(String[] args) {// TODO Auto-generated method stubIndexReader IR = new IndexReader();}}
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