Lucene過濾器的簡單實現

package org.sam.demo.lucene;

import java.io.IOException;
import java.util.BitSet;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.TermDocs;
import org.apache.lucene.search.Filter;
/**
 * @author Sam
 * @copyright_code 123456789987654321
 * @Date 2008-09-16
 * */
public class DynamicFilter extends Filter{
    public String fieldValue = "";
    public String fieldKey = "";



    public DynamicFilter(String fieldKey,String security_advanced) {
        super();
        fieldValue = security_advanced;
        this.fieldKey = fieldKey;
    }



    @Override
    public BitSet bits(IndexReader reader) throws IOException {
        /* 這個是過濾一個指定Term 返回其他 */
        final BitSet bits = new BitSet(reader.maxDoc());
        /* 設置一個 bits 的大小  */
        bits.set(0,bits.size()-1);
        Term term = new Term(fieldKey,fieldValue);
        TermDocs termDocs = reader.termDocs(term);
        while(termDocs.next()){
            bits.set(termDocs.doc(),false);
        }
        return bits;


        /* 這個是返回一個指定的 Term  */
/*      BitSet result=new BitSet(reader.maxDoc());
        Term term = new Term(this.fieldKey,this.fieldValue);
        TermDocs td=reader.termDocs(term);
        while (td.next())
        {
            result.set(td.doc());
        }
        return result; */
    }

}

 

[java] view plaincopy

package org.sam.demo.lucene;

import java.io.IOException;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermsFilter;

/**
 * @author Sam
 * @copyright_code 123456789987654321
 * @Date 2008-09-16
 * */
public class AdvancedSearch {
    private final String PATH="E:/Lucene/Index6/";
    /* 關於搜索lucene提供了很多類，基本上需要用的也不多，所以這裏我就寫一些比較常用的！ */
    public static void main(String[] args) throws CorruptIndexException, IOException, ParseException {
        String[] keys = {"state","city"};
        String[] values = {"CA","Oakland"};
        new AdvancedSearch().booleanSerach(keys,values);
    }

    public void booleanSerach(String[] keys,String[] values) throws CorruptIndexException, IOException, ParseException{
        QueryParser qp = null;
        BooleanQuery bq = null;
        IndexSearcher search = new IndexSearcher(PATH);
        for(int i = 0 ; i < keys.length ; i++){
            qp = new QueryParser(keys[i],new StandardAnalyzer());
            Query tq = qp.parse(values[i]);
            bq = new BooleanQuery();
            bq.add(tq, BooleanClause.Occur.MUST);
        }
        Term t = new Term("fname","Dirk");
        TermsFilter tf = new TermsFilter();
        tf.addTerm(t);
        Hits hits = search.search(bq,new DynamicFilter("fname","Dirk"));
//      Hits hits = search.search(bq,tf);
        System.out.println(hits.length());
        for(int i = 0 ; i < hits.length() ;i++){
            for(int j = 0 ; j < keys.length ; j++)
                System.out.print(hits.doc(i).get(keys[j])+"  ");
            System.out.println();
        }
        search.close();
    }
}