ElasticSearch 创建索引、插入数据、修改数据、删除数据

创建索引

PUT demoindex

1{
2  "demoindex" : {
3    "settings" : {
4      "index" : {
5        "routing" : {
6          "allocation" : {
7            "include" : {
8              "_tier_preference" : "data_content"
9            }
10          }
11        },
12        "number_of_shards" : "1",
13        "provided_name" : "demoindex",
14        "creation_date" : "1612333489325",
15        "number_of_replicas" : "1",
16        "uuid" : "0L-lMc6CQR2ft-jDlO670A",
17        "version" : {
18          "created" : "7100299"
19        }
20      }
21    }
22  }
23}

number_of_shards：分片数，创建后不能修改

number_of_replicas：副本数/备份数

创建索引，并指定分片参数

1PUT /demoindex/
2{
3  "settings":{
4    "index":{
5      "number_of_shards" : "5",
6      "number_of_replicas" : "1"
7    }
8  }
9}

1{
2  "acknowledged" : true,
3  "shards_acknowledged" : true,
4  "index" : "demoindex2"
5}

查看索引配置

GET demoindex2/_settings

1{
2  "demoindex2" : {
3    "settings" : {
4      "index" : {
5        "routing" : {
6          "allocation" : {
7            "include" : {
8              "_tier_preference" : "data_content"
9            }
10          }
11        },
12        "number_of_shards" : "5",
13        "provided_name" : "demoindex2",
14        "creation_date" : "1612334114521",
15        "number_of_replicas" : "1",
16        "uuid" : "75BT_fx5Rhy3e0uf_zkayw",
17        "version" : {
18          "created" : "7100299"
19        }
20      }
21    }
22  }
23}

删除索引

DELETE demoindex2

插入数据

1PUT demoindex/_create/1
2{
3  "userName": "",
4  "age": 22
5}

1{
2  "_index" : "demoindex",
3  "_type" : "_doc",
4  "_id" : "1",
5  "_version" : 1,
6  "result" : "created",
7  "_shards" : {
8    "total" : 2,
9    "successful" : 1,
10    "failed" : 0
11  },
12  "_seq_no" : 0,
13  "_primary_term" : 1
14}

更新数据

1PUT demoindex/_doc/1
2{
3  "userName": "laowang",
4  "age": 22
5}

删除

DELETE demoindex/_doc/1

查询

GET demoindex/_doc/_search

GET demoindex/_doc/1

返回高亮代码的查询

1PUT demoindex/_doc/3
2{
3  "userName": "laowang",
4  "age": 22,
5  "content": "中国人民解放军，美国美利坚合众国武装部队，远哥"
6}
7
8PUT demoindex/_doc/4
9{
10  "userName": "laowang",
11  "age": 22,
12  "content": "中国人民解放军，美国美利坚合众国武装部队，远哥，中国人民站起来了"
13}
14
15GET demoindex/_doc/_search
16{
17    "query" : { "match" : { "content" : "中国" }},
18    "highlight" : {
19        "pre_tags" : ["<font color='red'>"],
20        "post_tags" : ["</font>"],
21        "fields" : {
22            "content" : {}
23        }
24    }
25}

返回结果

1{
2  "took" : 2,
3  "timed_out" : false,
4  "_shards" : {
5    "total" : 1,
6    "successful" : 1,
7    "skipped" : 0,
8    "failed" : 0
9  },
10  "hits" : {
11    "total" : {
12      "value" : 2,
13      "relation" : "eq"
14    },
15    "max_score" : 0.23802689,
16    "hits" : [
17      {
18        "_index" : "demoindex",
19        "_type" : "_doc",
20        "_id" : "4",
21        "_score" : 0.23802689,
22        "_source" : {
23          "userName" : "laowang",
24          "age" : 22,
25          "content" : "中国人民解放军，美国美利坚合众国武装部队，远哥，中国人民站起来了"
26        },
27        "highlight" : {
28          "content" : [
29            "<font color='red'>中国</font>人民解放军，美国美利坚合众国武装部队，远哥，<font color='red'>中国</font>人民站起来了"
30          ]
31        }
32      },
33      {
34        "_index" : "demoindex",
35        "_type" : "_doc",
36        "_id" : "3",
37        "_score" : 0.1976162,
38        "_source" : {
39          "userName" : "laowang",
40          "age" : 22,
41          "content" : "中国人民解放军，美国美利坚合众国武装部队，远哥"
42        },
43        "highlight" : {
44          "content" : [
45            "<font color='red'>中国</font>人民解放军，美国美利坚合众国武装部队，远哥"
46          ]
47        }
48      }
49    ]
50  }
51}

分页查询、过滤返回的字段属性

1GET demoindex/_doc/_search
2{
3	"query" : { "match" : { "content" : "中国" }},
4	"sort": [{
5		"updateTime": "asc"
6	}],
7	"highlight" : {
8		"pre_tags" : ["<font color='red'>"],
9		"post_tags" : ["</font>"],
10		"fields" : {
11			"content" : {}
12		}
13	},
14	"_source": {
15		"includes": [ "title","author","docType","fileDir","filePath","fileSHA1" ],
16		"excludes": [ "content" ]
17	},
18	"size": 10,
19	"from": 0
20}

安装ik分词插件 elasticsearch-analysis-ik

1、解压 elasticsearch-analysis-ik-7.10.2.zip

2、拷贝解压出来的所有文件放到 elasticsearch-7.10.2\plugins\ik 目录下（首次需要创建一个 ik 目录）

3、重启启动 elasticsearch

创建Ik分词的mapping

1POST demoindex/_mapping
2{
3    "properties":{
4        "content":{
5            "type":"text",
6            "analyzer":"ik_max_word",
7            "search_analyzer":"ik_smart"
8        }
9    }
10}
11
12PUT demoindex
13{
14    "mappings":{
15        "properties":{
16            "userName":{
17                "type":"keyword"
18            },
19            "age":{
20                "type":"long"
21            },
22            "content": {
23                "type": "text",
24                "analyzer": "ik_max_word",
25                "search_analyzer": "ik_smart"
26            }
27        }
28    }
29}

分词粒度分为：

ik_smart 和 ik_max_word

数据类型说明：

字符串类型

text 、 keyword

数值类型

long, integer, short, byte, double, float, half_float, scaled_float

日期类型

date

te布尔值类型

boolean

二进制类型

binary

范围类型

integer_range , float_range, long_range, double_range, date_range

ElasticSearch 创建索引、插入数据、修改数据、删除数据

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