一、基本操作目录
1、查看当前所有索引
# 所有索引 GET http://localhost:9200/_cat/indices?v # 查看s开头的索引 GET http://localhost:9200/_cat/indices/s*?v
2、查看当前所有索引别名
GET http://127.0.0.1:9200/_alias
3、配置账户密码访问
GET https://username:password@127.0.0.1:9200/
4、查询索引（别名）下的数据
GET http://127.0.0.1:9200/employee/_search { "query" : { "match" : { "last_name" : "Smith" } } }
只展示部分字段查找
GET student/_search { "query": { "match": { "age": "12" } }, "_source": { "includes": [ "name" ] } }
5、部分更新一个文档
POST /website/blog/1/_update { "doc" : { "tags" : [ "testing" ], "views": 0 } }
脚本更新（https://www.elastic.co/guide/en/elasticsearch/reference/5.6/modules-scripting.html）
POST /website/blog/1/_update { "script" : "ctx._source.tags+=new_tag", "params" : { "new_tag" : "search" } }
6、删除一整个索引
DELETE https://admin:123456@127.0.0.1:9200/test_2022-05-13
RESTClient
# 脚本更新 request.setScript( new Script( ScriptType.INLINE, "painless", "ctx._source.tags+=new_tag", Collections.emptyMap()));
https://blog.csdn.net/wyaoyao93/article/details/112467431
package study.wyy.esclient.high.document; import lombok.extern.slf4j.Slf4j; import org.elasticsearch.action.DocWriteResponse; import org.elasticsearch.action.support.WriteRequest; import org.elasticsearch.action.support.replication.ReplicationResponse; import org.elasticsearch.action.update.UpdateRequest; import org.elasticsearch.action.update.UpdateResponse; import org.elasticsearch.client.RequestOptions; import org.elasticsearch.common.document.DocumentField; import org.elasticsearch.common.unit.TimeValue; import org.elasticsearch.common.xcontent.XContentBuilder; import org.elasticsearch.common.xcontent.XContentFactory; import org.elasticsearch.common.xcontent.XContentType; import org.elasticsearch.index.get.GetResult; import org.junit.Test; import study.wyy.esclient.high.BaseTest; import java.io.IOException; import java.util.Map; /** * @author wyaoyao * @description * @date 2021/1/11 14:52 * 更新文档测试 */ @Slf4j public class UpdateDocumentTest extends BaseTest { /**** * 同步执行 */ @Test public void testSync() throws IOException { // 1 构建请求 索引库 文档id UpdateRequest request = new UpdateRequest("books","1"); // 2 配置参数 // 2.1 设置路由 //request.routing("hello"); // 2.2 设置超时时间 request.timeout(TimeValue.timeValueMinutes(2)); // 2.3 设置刷新策略 request.setRefreshPolicy(WriteRequest.RefreshPolicy.WAIT_UNTIL); // 2.4 设置：如果更新的文档在更新时被另一个操作更改，则重试更新的次数 request.retryOnConflict(3); // 2.5 启用源检查，默认是关闭 就是restAPI中的是是否返回Source字段 request.fetchSource(true); // 设置include和exclude String[] includes = new String[]{"title","language"}; String[] exclude = new String[]{"description"}; request.fetchSource(includes,exclude); // 3 构建json文档： 前面已经介绍过了es支持三种方式：json字符串，Map，XContentBuilder XContentBuilder xContentBuilder = XContentFactory.jsonBuilder(); xContentBuilder.startObject(); xContentBuilder.field("language","python"); xContentBuilder.field("title","改个题目试试"); xContentBuilder.endObject(); request= request.doc(xContentBuilder); // 4 执行 UpdateResponse response = client.update(request, RequestOptions.DEFAULT); // 5 解析响应 // 5.1 获取索引库和文档id String index = response.getIndex(); String id = response.getId(); log.info("索引库: {}; 文档id: {}",index,id); // 5.2 获取结果：枚举值 DocWriteResponse.Result result = response.getResult(); log.info("响应结果: {}",result); // 5.3 分片信息 ReplicationResponse.ShardInfo shardInfo = response.getShardInfo(); log.info("分片信息: {}",shardInfo); // 5.4 版本号 long version = response.getVersion(); log.info("版本号: {}",version); GetResult getResult = response.getGetResult(); Map<String, Object> source = getResult.getSource(); log.info("source: {}",source); Map<String, DocumentField> documentFields = getResult.getDocumentFields(); log.info("documentFields: {}",documentFields); Map<String, DocumentField> metadataFields = getResult.getMetadataFields(); log.info("metadataFields: {}",metadataFields); client.close(); } }
6、简单的批量操作
POST /_bulk { "delete": { "_index": "website", "_type": "blog", "_id": "123" }} { "create": { "_index": "website", "_type": "blog", "_id": "123" }} { "title": "My first blog post" } { "index": { "_index": "website", "_type": "blog" }} { "title": "My second blog post" } { "update": { "_index": "website", "_type": "blog", "_id": "123", "_retry_on_conflict" : 3} } { "doc" : {"title" : "My updated blog post"} }
7、批量添加文档
POST http://127.0.0.1:9200/blog/
{ "title": "My second blog entry", "text": "Still trying this out...", "date": "2014/01/01" }
8、删除一个文档
DELETE /website/blog/123
二、官方文档地址
表达式搜索 - https://www.elastic.co/guide/cn/elasticsearch/guide/current/_search_with_query_dsl.html
复杂的搜索 - https://www.elastic.co/guide/cn/elasticsearch/guide/current/_more_complicated_searches.html
文档部分更新 - https://www.elastic.co/guide/cn/elasticsearch/guide/current/partial-updates.html
深入搜索 - https://www.elastic.co/guide/cn/elasticsearch/guide/current/search-in-depth.html
代价较小的批量操作 - https://www.elastic.co/guide/cn/elasticsearch/guide/current/bulk.html
三、常用的语言的客户端
官方手册 - https://www.elastic.co/guide/en/elasticsearch/client/java-rest/7.1/index.html
民间简单入门手册 - https://www.letianbiji.com/elasticsearch/es7-java-RestClient.html
官方手册简单版 - https://www.elastic.co/guide/en/elasticsearch/client/java-rest/7.4/java-rest-high-supported-apis.html
四、docker安装Elastic
docker pull docker.elastic.co/elasticsearch/elasticsearch:7.7.0
docker run -d --name=elastic -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:7.7.0
# 如果有需要更改的配置进入容器中 vi config/elasticsearch.yml docker restart es
五、相关博客
索引别名的使用 - https://blog.csdn.net/qq330983778/article/details/102980861
Elastic查询语法详解 - https://www.knowledgedict.com/tutorial/elasticsearch-query.html
通过 _bulk 批量添加文档 - https://www.letianbiji.com/elasticsearch/es7-bulk-add-doc.html
查询只展示部分字段 - https://www.letianbiji.com/elasticsearch/es7-show-partial-fields.html
ES操作指引干货 - https://zhuanlan.zhihu.com/p/355515434
六、优秀手册
乐天笔记 - Elastic7快速上手 - https://www.letianbiji.com/elasticsearch/es7-quick-start.html
K - https://www.knowledgedict.com/tutorial/elasticsearch-intro.html