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lucene的丰富的各种查询(二)

和上文一样,列写lucene的查询用法
包括了RangeQuery  prefixQuery  phraseQuery  wildcastQuery   fuzzyQuery
被索引查询的文件,按照需求自己构造即可。
package search;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.text.SimpleDateFormat;
import java.util.Date;

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.Term;
import org.apache.lucene.search.FuzzyQuery;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.PhraseQuery;
import org.apache.lucene.search.PrefixQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.RangeQuery;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.WildcardQuery;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;

public class SearcherShow {
    
private static Directory directory = new RAMDirectory();
    
public static void preIndex() throws Exception{
        String fileName1 
= "./data/searchShow.txt";
        String fileName2 
= "./data/searchShow2.txt";
        String fileName3 
= "./data/test.txt";
        IndexWriter writer 
= new IndexWriter(directory,new StandardAnalyzer(),true);
        Document doc1 
= getDocument(fileName1);
        Document doc2 
= getDocument(fileName2);
        Document doc3 
= getDocument(fileName3);
        writer.addDocument(doc1);
        writer.addDocument(doc2);
        writer.addDocument(doc3);
        writer.close();
        
    }

    
//先建立索引才能执行
    
    
//termQuery   rangeQuery   booleanQuery的查询在Searcher类中
    public static void rangeQuery() throws Exception{
        Term startTerm 
= new Term("lastmodified","20070620");
        Term endTerm 
= new Term("lastmodified","20070622");
        RangeQuery query 
= new RangeQuery(startTerm,endTerm,true);
        IndexSearcher searcher 
= new IndexSearcher(directory);
        Hits hits 
= searcher.search(query);
        prtHits(hits);
    }

    
public static void prefixQuery() throws Exception{
        Term term 
= new Term("fileName","searchShow.txt");
        Term prefixterm 
= new Term("fileName","searchShow");
        IndexSearcher searcher 
= new IndexSearcher(directory);
        Query query 
= new TermQuery(term);
        Query prefixQuery 
= new PrefixQuery(prefixterm);
        Hits hits 
= searcher.search(query);
        Hits prefixHits 
= searcher.search(prefixQuery);
        prtHits(hits);
        System.out.println(
"----------");
        prtHits(prefixHits);
    }

    
public static void phraseQuery() throws Exception{
        IndexSearcher searcher 
= new IndexSearcher(directory);
        PhraseQuery query 
= new PhraseQuery();
        query.setSlop(
2);
        query.add(
new Term("contents","quick"));
        query.add(
new Term("contents","fox"));
        Hits hits 
= searcher.search(query);
        prtHits(hits);
    }

    
public static void wildcardQuery() throws Exception{
        IndexSearcher searcher 
= new IndexSearcher(directory);
        Query query 
= new WildcardQuery(new Term("contents","?ild*"));
        Hits hits 
= searcher.search(query);
        prtHits(hits);
    }

    
public static void fuzzyQuery() throws Exception{
        IndexSearcher searcher 
= new IndexSearcher(directory);
        Term term 
= new Term("contents","wuzza");
        FuzzyQuery query 
= new FuzzyQuery(term);
        Hits hits 
= searcher.search(query);
        prtHits(hits);
    }

    
public static Document getDocument(String fileName) throws Exception{
        File file 
= new File(fileName);
        Document doc 
= new Document();
        doc.add(Field.Keyword(
"fileName",file.getName() ));
        Date modified 
= new Date(file.lastModified());
        String lastmodified 
= new SimpleDateFormat("yyyyMMdd").format(modified);
        doc.add(Field.Keyword(
"lastmodified", lastmodified));
        BufferedReader br 
= new BufferedReader(new InputStreamReader(
                
new FileInputStream(file)));
        StringBuffer sb 
= new StringBuffer();
        String line 
= null;
        
while ((line = br.readLine()) != null{
            sb.append(line);
        }

        br.close();
        doc.add(Field.Text(
"contents",sb.toString() ));
        
return doc;
    }

    
public static void prtHits(Hits hits) throws Exception{
        
for(int i=0;i<hits.length();i++){
            Document doc 
= hits.doc(i);
            System.out.println(doc.get(
"fileName"));
            System.out.println(doc.get(
"lastmodified"));
        }

    }

    
public static void main(String[] args) throws Exception{
        preIndex();
//        rangeQuery();
//        prefixQuery();
//        phraseQuery();
//        wildcardQuery();
        fuzzyQuery();
    }

}

posted on 2007-06-21 15:08 dreamstone 阅读(3627) 评论(2)  编辑  收藏 所属分类: 搜索引擎lucence

评论

# re: lucene的丰富的各种查询(二) 2008-04-22 22:03 啊新

你的lucene是旧版本的吧,现在已经有2.0以上了。不过仍然谢谢你的总结。  回复  更多评论   

# re: lucene的丰富的各种查询(二) 2012-08-12 18:00 海波

re: lucene的丰富的各种查询(二)re: lucene的丰富的各种查询(二)re: lucene的丰富的各种查询(二)re: lucene的丰富的各种查询(二)re: lucene的丰富的各种查询(二)re: lucene的丰富的各种查询(二)re: lucene的丰富的各种查询(二)re: lucene的丰富的各种查询(二)re: lucene的丰富的各种查询(二)re: lucene的丰富的各种查询(二)海波倒萨 30263026  回复  更多评论   


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