elasticsearch入门，linux上简单操作

素颜马尾好姑娘i 2022-06-06 06:20 220阅读 0赞

**福利：**

[入门视频点击此处][Link 1]，注册账号看前几章，入门还是没问题的

**入门操作：**

说明：我这里新建的名称—index为test，type为kind

**1、创建索引**

curl -XPUT http://localhost:9200/test

补充，更详尽教程详见：[java创建索引][java]、[linux创建][linux]

**相应的删除索引：**

curl -XDELETE  http://localhost:9200/test

**2、创建restful风格插入**

curl -XPOST http://localhost:9200/索引名称/索引类型/id -d JSON格式的参数

curl -XPUT http://localhost:9200/test/kind/1?pretty -d '{"title":"test_1","label":["sofa","beauty","white","American"],"create_date":"2017-11-1 15:41"}'

**注意：**这种方式插入，中文会报错（我就因为这问题，耽误半天）

入门实验操作：

首先——插入几条测试数据：

curl -XPUT http://localhost:9200/test/kind/1?pretty -d '{"title":"sofa_1","label":["sofa","beauty","white","American"],"create_date":"2017-11-1 15:41"}'  
    curl -XPUT http://localhost:9200/test/kind/2?pretty -d '{"title":"sofa_2","label":["sofa","beauty","red","American"],"create_date":"2017-11-1 14:41"}'
    curl -XPUT http://localhost:9200/test/kind/3?pretty -d '{"title":"sofa_3","label":["sofa","cute","red","China"],"create_date":"2017-11-1 13:41"}'
    curl -XPUT http://localhost:9200/test/kind/4?pretty -d '{"title":"chair_4","label":["chair","cute","red","China"],"create_date":"2017-11-1 12:41"}'
    curl -XPUT http://localhost:9200/test/kind/5?pretty -d '{"title":"chair_5","label":["chair","beauty","white","American"],"create_date":"2017-11-1 11:41"}'
    curl -XPUT http://localhost:9200/test/kind/6?pretty -d '{"title":"chair_6","label":["chair","beauty","black","China"],"create_date":"2017-11-1 10:41"}'

①、搜索lable中含有China的

curl http://localhost:9200/test/kind/_search?q=label:China

②、搜索label中含有“beauty American”相关内容

（测试结果：这里返回内容就类似搜索引擎，匹配度越高优先返回，但也有些不是这样：比如搜"white American"）

curl -X GET http://localhost:9200/test/kind/_search?pretty -d '{"query" : {"match" : {"label" : "beauty American"}}}'

便于阅读，格式化如下：

curl http://localhost:9200/test/kind/_search?pretty -d 
    '{
        "query" : {
            "match" : {
                "label" : "beauty American"
            }
        }
    }'

**③****、**在满足2的基础上，再按照标签出现的次数推荐标签

curl -X GET http://localhost:9200/test/kind/_search?pretty -d '{"query" : {"match" : {"label" : "beauty American"}},"aggs": {"all_label": {"terms": { "field": "label" }}}}'

**注意：**这里使用elasticsearch的aggregations聚合查询有个问题，中文会被拆分成单个字统计，要将字段设置属性：

感谢文章：http://jingyan.baidu.com/article/15622f2400c160fdfcbea5e9.html

curl -X PUT http://localhost:9200/test/\_mapping/kind/ -d '\{"properties": \{"label": \{"type":"text","index": "**not\_analyzed**"\}\}\}'

**警告**：这里会报一个错误，点击：[Fielddata is disabled on text fields by default][]  
**错误解决办法：**执行如下操作，注意添加"**\_mapping**",感觉这句相当于给label字段定义为text类型，设置fielddata为true：  
curl -X PUT http://localhost:9200/test/\_mapping/kind/ -d '\{"properties": \{"label": \{"type":"text","index": "not\_analyzed","fielddata": true\}\}\}'

文末彩蛋，小技巧：

一、查看目前elasticsearch的索引总数据量（如图中访问\_search，其中hits中total即为总数据量）~~easy

![70][]

二、查看ES下有哪些索引

curl -XGET 127.0.0.1:9200/\_cat/indices

[Link 1]: http://www.roncoo.com/course/view/03b0916b225f4feb995586ab3e975c8f
[java]: http://www.cnblogs.com/coderdxj/p/6856145.html
[linux]: http://blog.csdn.net/u013063153/article/details/54583720
[Fielddata is disabled on text fields by default]: http://blog.csdn.net/u011403655/article/details/71107415
[70]: /images/20220606/470985a3daa548fa9e8ed2d1a73c8cb5.png