lucene-多字段、多索引搜索与多线程搜索

1、多字段搜索

1）

Term t1=new Term("title","会议");

TermQuery q1=new TermQuery(t1);

Term t2=new Term("context","交通部");

TermQuery q2=new TermQuery(t2);

BooleanQuery q=new BooleanQuery();

q.add(q1,BooleanClause.Occur.SHOULD);

q.add(q2,BooleanClause.Occur.SHOULD);

2)

String[] fileds=["title","context"];

String[] keys=["会议","交通部"]

MultiFieldQueryParser mp=new MultiFieldQueryParser(fields,new StandardAnalyzer());

Query q=mp.parse(keys);

还例如：

String[] query = {"query1", "query2", "query3"};
String[] fields = {"filename", "contents", "description"};
BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
BooleanClause.Occur.MUST,
BooleanClause.Occur.MUST_NOT};
MultiFieldQueryParser.parse(query, fields, flags, analyzer);

The code above would construct a query:

 
 (filename:query1) +(contents:query2) -(description:query3)
2、多索引

IndexSearcher searcher1=new IndexSearcher("index1");

IndexSearcher searcher2=new IndexSearcher("index2");

IndexSearcher[] searchers={search1,search2};

MultiSearcher searcher=new MultiSearcher(searchers);

3、多线程

IndexSearcher searcher1=new IndexSearcher("index1");
IndexSearcher searcher2=new IndexSearcher("index2");
IndexSearcher[] searchers={search1,search2};
ParallelMultiSearcher searcher=new ParallelMultiSearcher(searchers);