1. # 使用spring的客户端
    2. logging:
    3.   level:
    4.     org.springframework.data.elasticsearch.core: debug
    1. # Elasticsearch RestHighLevelClient客户端
    2. // 请求ES
    3. SearchResponse searchResponse = this.restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
    4. // 打印请求体
    5. System.out.println(searchRequest.source().toString());
    6. // 打印返回体  
    7. System.out.println(searchResponse.toString());