如何翻译弹性搜索查询在Java中使用查询生成器?

Question

我正试图在Java中翻译以下弹性搜索查询，使用查询生成器?有人能给点建议吗?

GET <index-name>/_search
{
“size”: 1,
“sort”: [
{
“Date”: {
“order”: “desc”
}
}
]
}

Answer 1

您需要使用SortBuilder对字段进行排序。下面的请求将按desc顺序对Date字段进行排序

RestHighLevelClient client = new RestHighLevelClient(restClientBuilder);
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.size(1).sort(new FieldSortBuilder("Date").order(SortOrder.DESC));
SearchRequest searchRequest = new SearchRequest("my-index");
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);