Lucene的同引多域搜索

    使用MultiFieldQueryParser类即可。

示例代码：

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package com.lucene.search;

import java.io.File;
import java.io.IOException;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;

public class Searcher {

    public static void main(String[] args) throws Exception {
        File indexDir = new File("C:\\target\\index\\book");
        if (!indexDir.exists() || !indexDir.isDirectory()) {
            throw new IOException();
        }
        search(indexDir);
    }

    public static void search(File indexDir) throws Exception {

        Directory fsDir = FSDirectory.getDirectory(indexDir);
        IndexSearcher searcher = new IndexSearcher(fsDir);

        String[] queries = { "中文版", "8*" };
        String[] fields = { "name", "isbn" };
        BooleanClause.Occur[] clauses = { BooleanClause.Occur.SHOULD, BooleanClause.Occur.SHOULD };
        Query query = MultiFieldQueryParser.parse(queries, fields, clauses, new StandardAnalyzer());

        Hits hits = searcher.search(query);
        System.out.println("共有" + searcher.maxDoc() + "条索引，命中" + hits.length() + "条");
        for (int i = 0; i < hits.length(); i++) {
            int DocId = hits.id(i);
            String DocName  = hits.doc(i).get("name");
            String DocIsbn  = hits.doc(i).get("isbn");
            String DocPblDt = hits.doc(i).get("pbl_dt");
            System.out.println(DocId + ":" + DocName + "  ISBN:" + DocIsbn + "  PBLDT:" + DocPblDt);
        }
    }
}

package com.lucene.search;

import java.io.File;
import java.io.IOException;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;

public class Searcher {

    public static void main(String[] args) throws Exception {
        File indexDir = new File("C:\\target\\index\\book");
        if (!indexDir.exists() || !indexDir.isDirectory()) {
            throw new IOException();
        }
        search(indexDir);
    }

    public static void search(File indexDir) throws Exception {

        Directory fsDir = FSDirectory.getDirectory(indexDir);
        IndexSearcher searcher = new IndexSearcher(fsDir);

  String[] queries = { "中文版", "8*" };
  String[] fields = { "name", "isbn" };
  BooleanClause.Occur[] clauses = { BooleanClause.Occur.SHOULD, BooleanClause.Occur.SHOULD };
        Query query = MultiFieldQueryParser.parse(queries, fields, clauses, new StandardAnalyzer());

        Hits hits = searcher.search(query);
        System.out.println("共有" + searcher.maxDoc() + "条索引，命中" + hits.length() + "条");
        for (int i = 0; i < hits.length(); i++) {
            int DocId = hits.id(i);
            String DocName  = hits.doc(i).get("name");
            String DocIsbn  = hits.doc(i).get("isbn");
            String DocPblDt = hits.doc(i).get("pbl_dt");
            System.out.println(DocId + ":" + DocName + "  ISBN:" + DocIsbn + "  PBLDT:" + DocPblDt);
        }
    }
}注意：BooleanClause.Occur[]数组,它表示多个条件之间的关系：

BooleanClause.Occur.MUST表示and,

BooleanClause.Occur.MUST_NOT表示not,

BooleanClause.Occur.SHOULD表示or.

 

【责编:landy】

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