本文最后更新于：1 年前
Elasticsearch(ES)
97-实用开发篇-ES简介11:07
https://www.bilibili.com/video/BV15b4y1a7yG/
源码：
https://github.com/elastic/elasticsearch
IK分词器：https://github.com/medcl/elasticsearch-analysis-ik
- Elasticsearch是一个分布式全文搜索引擎
先分词，然后根据关键字获取对应的数据的索引ID，倒排索引，创建文档，使用文档
1
2
3
4
5
6
| 验证：http://localhost:9200/
postman请求：
创建books索引：PUT http://localhost:9200/books
查询books索引：GET http://localhost:9200/books
删除books索引：DELETE http://localhost:9200/books
|
1
2
3
4
5
|
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
|
一、配置分词器
创建索引并指定规则
请求类型：PUT
请求地址：http://localhost:9200/books
请求体：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
| {
"mappings": {
"properties": {
"id": {
"type": "keyword"
},
"name": {
"type": "text",
"analyzer": "ik_max_word",
"copy_to": "all"
},
"type": {
"type": "keyword"
},
"description": {
"type": "text",
"analyzer": "ik_max_word",
"copy_to": "all"
},
"all": {
"type": "text",
"analyzer": "ik_max_word"
}
}
}
}
|
响应结果：
1
2
3
4
5
| {
"acknowledged": true,
"shards_acknowledged": true,
"index": "books"
}
|
二、创建文档
1. 添加数据
请求类型：PUT
请求地址：
生成随机id http://localhost:9200/books/_doc
生成指定id（请求体可不加id属性） http://localhost:9200/books/_doc/1
生成指定id http://localhost:9200/books/_create/1
请求体：
1
2
3
4
5
6
| {
"id": 1,
"name": "Spring 5设计模式",
"type": "计算机理论",
"description": "深入Spring源码剖析Spring源码中蕴含的10大设计模式"
}
|
响应结果：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| {
"_index": "books",
"_type": "_doc",
"_id": "CSBqNokB3XgdIoLs0aEz",
"_version": 1,
"result": "created",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 0,
"_primary_term": 1
}
|
2. 查询数据
请求类型：GET
请求地址：http://localhost:9200/books/_doc/1
请求体：
响应结果：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
| {
"_index": "books",
"_type": "_doc",
"_id": "1",
"_version": 1,
"_seq_no": 1,
"_primary_term": 1,
"found": true,
"_source": {
"id": 1,
"name": "Spring 5设计模式",
"type": "计算机理论",
"description": "深入Spring源码剖析Spring源码中蕴含的10大设计模式"
}
}
|
3. 查询全部
请求类型：GET
请求地址：http://localhost:9200/books/_search
请求体：
响应结果：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
| {
"took": 8,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 2,
"relation": "eq"
},
"max_score": 1.0,
"hits": [
{
"_index": "books",
"_type": "_doc",
"_id": "CSBqNokB3XgdIoLs0aEz",
"_score": 1.0,
"_source": {
"id": 1,
"name": "Spring 5设计模式",
"type": "计算机理论",
"description": "深入Spring源码剖析Spring源码中蕴含的10大设计模式"
}
},
{
"_index": "books",
"_type": "_doc",
"_id": "1",
"_score": 1.0,
"_source": {
"id": 1,
"name": "Spring 5设计模式",
"type": "计算机理论",
"description": "深入Spring源码剖析Spring源码中蕴含的10大设计模式"
}
}
]
}
}
|
4. 根据内容查询
请求类型：GET
请求地址：http://localhost:9200/books/_search?q=name:spring
请求体：
响应结果：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
| {
"took": 29,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 2,
"relation": "eq"
},
"max_score": 0.18232156,
"hits": [
{
"_index": "books",
"_type": "_doc",
"_id": "CSBqNokB3XgdIoLs0aEz",
"_score": 0.18232156,
"_source": {
"id": 1,
"name": "Spring 5设计模式",
"type": "计算机理论",
"description": "深入Spring源码剖析Spring源码中蕴含的10大设计模式"
}
},
{
"_index": "books",
"_type": "_doc",
"_id": "1",
"_score": 0.18232156,
"_source": {
"id": 1,
"name": "Spring 5设计模式",
"type": "计算机理论",
"description": "深入Spring源码剖析Spring源码中蕴含的10大设计模式"
}
}
]
}
}
|
5. 删除数据
请求类型：DELETE
请求地址：http://localhost:9200/books/_doc/1
响应结果：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| {
"_index": "books",
"_type": "_doc",
"_id": "1",
"_version": 2,
"result": "deleted",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 2,
"_primary_term": 1
}
|
6. 更新数据
如果数据不存在，就会新增一条数据；如果数据存在，则会更新数据。全覆盖式更新。
请求类型：POST/PUT
请求地址：http://localhost:9200/books/_doc/1
请求体：
1
2
3
| {
"name": "Spring 5设计模式222"
}
|
响应结果：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| {
"_index": "books",
"_type": "_doc",
"_id": "1",
"_version": 2,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 4,
"_primary_term": 1
}
|
7. 更新数据非全覆盖式修改
这里的POST和PUT两中请求类型的区别：
POST：当数据一样时，并不会进行任何操作，“result” : “noop”，版本并不会新增
PUT：“result” : “updated”, //一直是更新，无论是否一致 版本都会新增
请求类型：POST/PUT
请求地址：http://localhost:9200/books/_update/1
请求体：
1
2
3
4
5
| {
"doc": {
"name": "Spring 5设计模式"
}
}
|
响应结果：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| {
"_index": "books",
"_type": "_doc",
"_id": "1",
"_version": 3,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 5,
"_primary_term": 1
}
|