ElasticSearch6.x Java API中的and、or和not

ElasticSearch Java API 官网： https://www.elastic.co/guide/en/elasticsearch/reference/6.1/getting-started.html

ElasticSearch 过滤条件，类似于SQL中的and、or、not

demo如下：

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1.               //搜索内容设置>>>>>>>>>>>>>>>>>>>>>>  
2. //索引"student_manage"是索引"student"、"class"、"course_info"共同的别名  
3. SearchRequestBuilder searchRequestBuilder = client.prepareSearch("student_manage");  
4. //searchRequestBuilder.setTypes(type);  
5. searchRequestBuilder.setSearchType(SearchType.DFS_QUERY_THEN_FETCH);  
6. ......  
7.   
8. //开始过滤>>>>>>>>>>>>>>>>>>>>>>  
9.    //************过滤条件中,must相当于and,should相当于or,must_not相当于not*****************//  
10. //过滤条件1  
11. org.elasticsearch.index.query.QueryBuilder postFilter1= QueryBuilders  
12.         .boolQuery()  
13.         .must(QueryBuilders.termsQuery("_index", "student"))  
14.         .must(QueryBuilders.termsQuery("sex", "male"))  
15.         .must(QueryBuilders.termsQuery("age", "16","17"));  
16. //过滤条件2  
17. org.elasticsearch.index.query.QueryBuilder postFilter2= QueryBuilders  
18.         .boolQuery()  
19.         .must(QueryBuilders.termsQuery("_index", "class"))  
20.         .must(QueryBuilders.termsQuery("type", "math"))  
21.         .must(QueryBuilders.boolQuery().should(QueryBuilders.termsQuery("num", "6","8")));  
22. //过滤条件3  
23. org.elasticsearch.index.query.QueryBuilder postFilter3= QueryBuilders  
24.         .boolQuery()  
25.         .must(QueryBuilders.termsQuery("_index", "course_info"))  
26.         .must(QueryBuilders.termsQuery("isopen", "1"))  
27.         .must(QueryBuilders.termsQuery("status", "2"))  
28.         .must(QueryBuilders.termsQuery("grade", "2"));  
29. //整合三者过滤条件（OR）  
30. org.elasticsearch.index.query.QueryBuilder postFilterBool =QueryBuilders.boolQuery()  
31.         .should(postFilter1)  
32.         .should(postFilter2)  
33.         .should(postFilter3);  
34. searchRequestBuilder.setPostFilter(postFilterBool);  
35. //执行搜索>>>>>>>>>>>>>>>>>>>>>>  
36. SearchResponse res = searchRequestBuilder.execute().actionGet();