ElasticSearch multi search java api问题

当前ES api文档上面看到

SearchRequestBuilder srb1 = node.client()
    .prepareSearch().setQuery(QueryBuilders.queryStringQuery("elasticsearch")).setSize(1);
SearchRequestBuilder srb2 = node.client()
    .prepareSearch().setQuery(QueryBuilders.matchQuery("name", "kimchy")).setSize(1);

MultiSearchResponse sr = node.client().prepareMultiSearch()
        .add(srb1)
        .add(srb2)
        .execute().actionGet();

// You will get all inpidual responses from MultiSearchResponse#getResponses()
long nbHits = 0;
for (MultiSearchResponse.Item item : sr.getResponses()) {
    SearchResponse response = item.getResponse();
    nbHits += response.getHits().getTotalHits();
}

这一段多查询条件代码，但是由于match查询接受一个operator参数，该参数的默认值是"or"。可以将它改变为"and"来要求所有的词条都需要被匹配：

GET /my_index/my_type/_search
{
    "query": {
        "match": {
            "title": {      
                "query":    "BROWN DOG!",
                "operator": "and"
            }
        }
    }
}

源代码如上，现在需要改进java api使用方式，请指教，谢谢