lucene的丰富的各种查询（二）

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();    }}