Java_ABC_4.Lucene搜索

package lucene;

import java.io.File;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.store.FSDirectory;

public class TxtFileSearcher {
 
 public static void main(String[] args) throws Exception
 {
     //構造索引目錄
       File indexDir = new File("D:\\luceneIndex");
       if(!indexDir.exists()){
         System.out.println("The Lucene index is not exist");
         return;
       }
       //構造文件系統目錄
       FSDirectory directory = FSDirectory.getDirectory(indexDir,false);
       //構造搜索對象
       IndexSearcher searcher = new IndexSearcher(directory);
      
       //構造查詢類
    String queryStr = "lucene";
       Term term = new Term("contents",queryStr.toLowerCase());
       TermQuery luceneQuery = new TermQuery(term);
      
       //將查詢類引入查詢類，結果保存於Hits
       Hits hits = searcher.search(luceneQuery);
      
       //輸出結果
       for(int i = 0; i < hits.length(); i++)
       {
        Document document = hits.doc(i);
        System.out.println("File: " + document.get("path"));
       }
  }
}