lucene当中的各种query(二)

MultiPhraseQuery

实现以下功能:
前缀搜索:
IndexSearcher searcher=new IndexSearcher(INDEX_STORE_PATH);
       
        MultiPhraseQuery query=new MultiPhraseQuery();
        query.add(new Term("bookname","钢"));
        Term t1=new Term("bookname","铁");
        Term t2=new Term("bookname","和");
        Term t3=new Term("bookname","要");
        query.add(new Term[]{t1,t2,t3});
        Hits hits=searcher.search(query);
        for(int i=0;i<hits.length();i++)
        {
            System.out.println(hits.doc(i));
        }

后缀搜索:
IndexSearcher searcher=new IndexSearcher(INDEX_STORE_PATH);
       
        MultiPhraseQuery query=new MultiPhraseQuery();
       
        Term t1=new Term("bookname","钢");
        Term t2=new Term("bookname","和");
        query.add(new Term[]{t1,t2});
       
        query.add(new Term("bookname","铁"));
        Hits hits=searcher.search(query);
        for(int i=0;i<hits.length();i++)
        {
            System.out.println(hits.doc(i));
        }


混合搜索:
IndexSearcher searcher=new IndexSearcher(INDEX_STORE_PATH);
       
        MultiPhraseQuery query=new MultiPhraseQuery();
       
        Term t1=new Term("bookname","钢");
        Term t2=new Term("bookname","和");
        query.add(new Term[]{t1,t2});
       
        query.add(new Term("bookname","铁"));
       
        Term t3=new Term("bookname","是");
        Term t4=new Term("bookname","战");
        query.add(new Term[]{t3,t4});
       
        Hits hits=searcher.search(query);
        for(int i=0;i<hits.length();i++)
        {
            System.out.println(hits.doc(i));
        }
       
可以用正则表达式形象地描绘混合搜索:
 query=(钢|和)铁(是|战)

 
本来,要实现 "a (b|c|d) e" 这样一个语意的Query ,我猜测需要用 "a b e", "a c e" ,"a d e"三个PhraseQuery

来实现, 现在MultiPhraseQuery实现了这样一个方法 

public void add(Term[] terms, int position)
也就是说,可以在原来的PhraseQuery中的任意位置添加更多的term

于是也就可以方便的实现"a (b|c|d) e"这样的查询语意了。

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