springdataelasticsearch多索引查询
一次查询多个索引数据
es里可以这样写
GET 索引1,索引2,索引3/_search
也可以这样
给索引创建别名,多个索引可以使用一个别名
POST /_aliases{
"actions": [{
"add": {"index": "myindex2","alias": "myalias"}
},{
"add": {"index": "myindex3","alias": "myalias"}
}
]
}
或者
PUT /myindex2/_alias/myalias
删除别名
POST /_aliases{
"actions": [{
"remove": { "index": "myindex3", "alias": "my_index_alias"}
}
]
}
java查询多个索引
SearchQuery searchQuery = new NativeSearchQueryBuilder().withIndices(
"myindex2","myindex4") //可以直接使用别名.withQuery(queryBuilder)
//.addAggregation(sumBuilder).build();
List<Map> map=elasticsearchTemplate.query(searchQuery, response -> {
SearchHits hits = response.getHits();
List<Map> list=new ArrayList<>();
Arrays.stream(hits.getHits()).forEach(h -> {
Map<String, Object> source = h.getSource();
System.out.println(JSONArray.toJSONString(source));
list.add(source);
});
return list;
});
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