开发者学堂课程【ElasticSearch 入门精讲：boolQuery】学习笔记，与课程紧密连接，让用户快速学习知识。
课程地址：https://developer.aliyun.com/learning/course/631/detail/10004
boolQery
内容介绍：
一、讲义
二、演示
一、讲义
组合查询（复杂查询）
must(QueryBuilders): AND
mustNot(QueryBuilders): NOT
should(QueryBuilders):OR
在定义 json：放置到 Elasticsearch的插件中
{
"query":{
"bool":{
"must":{
"term":{
"title":"elasticsearch"
}
},
"should":{
"range":{
"id":{
"from":1,
"to":2
}
}SearchResponse searchResponse = client.prepareSearch("blog2").setTypes("article") .setQuery(QueryBuilders.boolQuery().must(QueryBuilderstermQuery("title","搜索").must(QueryBuilders.wildcardQuery("content","elagic*ch")).get();
SearchHits hits = searchResponse.getHits();//获取命中次数，查询结果有多少对象
二、演示
/**
* boolQuery 演示
*需求:查询索引库 bigdata 中的 type 之 product 中，name 为 hadoop,且 author 中包含了辛格的索引信息。
*/
@Test
public void testBoolQuery(){
//检索
SearchResponse response = client.preparesearch(INDEX)
.setTypes (TYPE)
.setQuery(QueryBuilders.boolQuery()
.must(QueryBuilders.matchPhraseQuery(name: "name"，value: "hadoop"))
.should(QueryBuilders.wildcardQuery(name: "author"，query:"Sp*")))
.get();
//显示检索到的信息
SearchHits hits = response.getHits();
for (SearchHit hit : hits){
System.out.println(hit.getSourceAsString());
}
}
运行结果如图
要显示检索信息为施瓦辛格，修改代码
.should(QueryBuilders.wildcardQuery(name: "author"，query:"Sp*")))
为
.should(QueryBuilders.matchPhraseQuery(name: "author"，query:"Spark")))
运行结果如图
如要显示两条记录，则应该将 must 都换为 should，为或的关系，
.should(QueryBuilders.matchPhraseQuery(name: "name"，value: "hadoop"))
如图
