Elasticsearch的搭建

简介

Elasticsearch是一个基于Lucene的搜索服务器。它提供了一个分布式多用户能力的全文搜索引擎，基于RESTful web接口。Elasticsearch 是用Java开发的，并作为Apache许可条款下的开放源码发布，是当前流行的企业级搜索引擎。

环境

Elasticsearch是用java开发的，可支持跨平台，Window、Linux、Mac等平台都可以安装，安装前需要先配置好java环境

Github地址

中文下载地址

安装

下载好安装包后，直接打开即可运行

Linux下：./bin/elasticsearch

Windows下：bin\elasticsearch.bat

Windows下可以把安装包.bin路径配置在环境变量中，就可以使用命令行启动elasticsearch了。
例如在系统变量Path中加入我的文件路径：D:\Program Files\elasticsearch-7.5.0\bin

查看是否安装成功

Linux:

``` curl -X GET http://localhost:9200/

```

Windows:

浏览器访问 http://localhost:9200/

安装成功则会返回类似以下信息 ``` { "name": "node-1", "clustername": "myescluster", "clusteruuid": "hCKjYSnqSR6hea2k6jssw", "version": { "number": "7.3.0", "buildflavor": "default", "buildtype": "tar", "buildhash": "de777fa", "builddate": "2019-07-24T18:30:11.767338Z", "buildsnapshot": false, "luceneversion": "8.1.0", "minimumwirecompatibilityversion": "6.8.0", "minimumindexcompatibility_version": "6.0.0-beta1" }, "tagline": "You Know, for Search" }

```

简单使用

写入

```json curl -XPUT 'http://localhost:9200/myindex/doc/1?pretty' -H 'Content-Type: application/json' -d ' { "user": "icehill", "message": "测试数据写入" }'

curl -XPUT 'http://localhost:9200/myindex/doc/2?pretty' -H 'Content-Type: application/json' -d ' { "user": "bita", "message": "我是中国人" }'

curl -XPUT 'http://localhost:9200/myindex/doc/3?pretty' -H 'Content-Type: application/json' -d ' { "user": "programmer", "message": "我是一个程序员" }' ``` 返回示例：

{ "_index" : "my_index", "_type" : "_doc", "_id" : "1", "_version" : 1, "result" : "created", "_shards" : { "total" : 2, "successful" : 1, "failed" : 0 }, "_seq_no" : 0, "_primary_term" : 1 }

查询 curl -XGET 'http://localhost:9200/my_index/_doc/1?pretty=true' curl -XGET 'http://localhost:9200/my_index/_doc/2?pretty=true' curl -XGET 'http://localhost:9200/my_index/_doc/3?pretty=true' 返回示例： { "_index" : "my_index", "_type" : "_doc", "_id" : "1", "_version" : 1, "_seq_no" : 0, "_primary_term" : 1, "found" : true, "_source" : { "user" : "icehill", "message" : "测试数据写入" } }

搜索 curl -XGET 'http://localhost:9200/my_index/_search?pretty=true' -H 'Content-Type: application/json' -d ' { "query" : { "match" : { "user": "icehill" } } }' 返回示例：

{ "took" : 5, "timed_out" : false, "_shards" : { "total" : 1, "successful" : 1, "skipped" : 0, "failed" : 0 }, "hits" : { "total" : { "value" : 1, "relation" : "eq" }, "max_score" : 0.9808292, "hits" : [ { "_index" : "my_index", "_type" : "_doc", "_id" : "1", "_score" : 0.9808292, "_source" : { "user" : "icehill", "message" : "测试数据写入" } } ] } }

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