相关组件安装
商品搜索（2）
课程内容
- elasticsearch花式查询
- 索引商品
- elasticsearch与mysql数据同步
1. elasticsearch花式查询
1.1 ik分词器的安装
- 获取ik分词器安装包：https://github.com/medcl/elasticsearch-analysis-ik/releases/tag/v7.12.1
wget https://github.com/medcl/elasticsearch-analysis-ik/releases/tag/v7.12.1
- 进入es的组件目录并解压压缩包
cd /docker/es/plugins
unzip elasticsearch-analysis-ik-7.12.1.zip
这里解压出来可能会是很散乱的，需要将解压出来的问题同一进行整理，整理到一个统一存储ik分词器相关的文件的目录：
mkdir ik
mv /docker/es/plugins/commons-codec-1.9.jar /docker/es/plugins/ik/
mv /docker/es/plugins/config /docker/es/plugins/ik/
mv /docker/es/plugins/httpclient-4.5.2.jar /docker/es/plugins/ik/
mv /docker/es/plugins/plugin-descriptor.properties /docker/es/plugins/ik/
mv /docker/es/plugins/commons-logging-1.2.jar /docker/es/plugins/ik/
mv /docker/es/plugins/elasticsearch-analysis-ik-7.12.1.jar /docker/es/plugins/ik/
mv /docker/es/plugins/httpcore-4.4.4.jar /docker/es/plugins/ik/
mv /docker/es/plugins/plugin-security.policy /docker/es/plugins/ik/
- 完成后重启es
docker restart es
注意事项：安装es的ik分词器可能导致es内存溢出，可以调整虚拟机内存到2G，es配置中增加内存限制：indices.fielddata.cache.size: 50%
1.2 花式查询
创建一个索引
PUT /products/
{
"mappings": {
"properties": {
"name":{
"type": "text",
"analyzer": "ik_smart"
},
"long_name":{
"type": "text",
"analyzer": "ik_smart"
},
"brand_id":{
"type": "integer"
},
"category_id":{
"type":"integer"
},
"shop_id":{
"type":"integer"
},
"price":{
"type":"scaled_float",
"scaling_factor":100
},
"sold_count":{
"type":"integer"
},
"review_count":{
"type":"integer"
},
"status":{
"type":"integer"
},
"create_time" : {
"type" : "date"
},
"last_time" : {
"type" : "date"
}
}
}
}
（在mysql中新增的数据，由golang组件，go-mysql-elasticsearch进行同步到es的数据如下）：
GET /products/_search
返回结果：
{
"took" : 0,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 5,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200039",
"_score" : 1.0,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200039,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 14 16G 512G ",
"name" : "HUAWEi Mate Book 14",
"price" : 9090,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200040",
"_score" : 1.0,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200040,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "HUAWEi Mate Book 13",
"price" : 9090,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200041",
"_score" : 1.0,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200041,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "IPhone Mate Book 13",
"price" : 9090,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200042",
"_score" : 1.0,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200042,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "OPPO 40s 16G 512G ",
"name" : "OPPO 40s",
"price" : 9090,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200043",
"_score" : 1.0,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200043,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "MateBook 16G 512G ",
"name" : "MateBook X",
"price" : 9090,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
}
]
}
}
- 普通查询
GET /products/_doc/_search
{
"query":{
"match":{
"name":"HUAWEI"
}
}
}
返回结果：
{
"took" : 18,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : 0.79423964,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200039",
"_score" : 0.79423964,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200039,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 14 16G 512G ",
"name" : "HUAWEi Mate Book 14",
"price" : 9090,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200040",
"_score" : 0.79423964,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200040,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "HUAWEi Mate Book 13",
"price" : 9090,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
}
]
}
}
如果是只想要查询name与price两个字段呢？
GET /products/_doc/_search
{
"query":{
"match":{
"name":"HUAWEI"
}
},
"_source":["name","price"]
}
返回结果：
{
"took" : 4,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : 0.79423964,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200039",
"_score" : 0.79423964,
"_source" : {
"price" : 9090,
"name" : "HUAWEi Mate Book 14"
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200040",
"_score" : 0.79423964,
"_source" : {
"price" : 9090,
"name" : "HUAWEi Mate Book 13"
}
}
]
}
}
如何进行排序？默认是根据_score匹配分值进行降序排序的，但如果我们指定一个字段进行asc或者desc排序呢？这里我使用price来进行降序
GET /products/_doc/_search
{
"query":{
"match":{
"name":"Book"
}
},
"_source":["name","price"],
"sort":[
{
"price":{
"order":"desc"
}
}
]
}
返回结果：
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200040",
"_score" : null,
"_source" : {
"price" : 8888,
"name" : "HUAWEi Mate Book 13"
},
"sort" : [
8888.0
]
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200041",
"_score" : null,
"_source" : {
"price" : 5499,
"name" : "IPhone Mate Book 13"
},
"sort" : [
5499.0
]
}
]
}
}
在实际开发中，我们经常用到分页查询。那在elasticsearch中怎么做到分页呢？
GET /products/_doc/_search
{
"query":{
"match":{
"name":"Book"
}
},
"_source":["name","price"],
"sort":[
{
"price":{
"order":"desc"
}
}
],
"from":0,
"size":1
}
返回结果：
{
"took" : 25,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : null,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200040",
"_score" : null,
"_source" : {
"price" : 8888,
"name" : "HUAWEi Mate Book 13"
},
"sort" : [
8888.0
]
}
]
}
}
以上就是一个es的分页查询，添加了from和size属性，其中from是指分页的起始索引，size是指分页容量
布尔查询，多条件查询
GET /products/_doc/_search
{
"query":{
"bool":{
"must":[
{
"match":{
"name":"Book"
}
},
{
"match":{
"shop_id":1
}
}
]
}
}
}
返回结果：
{
"took" : 80,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : 1.744874,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200040",
"_score" : 1.744874,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200040,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "HUAWEi Mate Book 13",
"price" : 8888,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200041",
"_score" : 1.744874,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200041,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "IPhone Mate Book 13",
"price" : 5499,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
}
]
}
}
其中bool代表此查询为布尔查询，也就是多条件查询，而must则是and的意思，就是后面集合里的所有条件都要满足：
- must（and），所有的条件都要符合，相当于where id=1 and name=xxx
- should（or），满足一个条件即可，相当于 where id=1 or name=xxx
- must_not（！=），所有条件必须满足不等于，相当于where id!=1 and name!=xxx
should的查询：
GET /products/_doc/_search
{
"query":{
"bool":{
"should":[
{
"match":{
"name":"Book"
}
},
{
"match":{
"shop_id":1
}
}
]
}
}
}
返回结果：
{
"took" : 42,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 4,
"relation" : "eq"
},
"max_score" : 1.744874,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200040",
"_score" : 1.744874,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200040,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "HUAWEi Mate Book 13",
"price" : 8888,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200041",
"_score" : 1.744874,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200041,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "IPhone Mate Book 13",
"price" : 5499,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200043",
"_score" : 1.0,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200043,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "MateBook 16G 512G ",
"name" : "MateBook X",
"price" : 9090,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200042",
"_score" : 1.0,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200042,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "OPPO 40s 16G 512G ",
"name" : "OPPO 40s",
"price" : 13880,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
}
]
}
}
must_not的查询
GET /products/_doc/_search
{
"query":{
"bool":{
"must_not":[
{
"match":{
"name":"Book"
}
},
{
"match":{
"shop_id":1
}
}
]
}
}
}
返回结果：
{
"took" : 20,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 0,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
}
}
因为没有相关数据，所以返回是个空
过滤查询
查询name带有Book或者price等于8888，并筛选出1000<price<=6000的文档
GET /products/_doc/_search
{
"query":{
"bool":{
"should":[
{
"match":{
"name":"Book"
}
},
{
"match":{
"price":8888
}
}
],
"filter":{
"range":{
"price":{
"gt":1000,
"lte":6000
}
}
}
}
}
}
返回结果：
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 1,
"relation" : "eq"
},
"max_score" : 0.744874,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200041",
"_score" : 0.744874,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200041,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "IPhone Mate Book 13",
"price" : 5499,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
}
]
}
}
精准查询
- term：通过倒排索引指定的词条进行精确的查找，配合keyword类型的字段，都不分词，直接匹配
- match：查询之前会通过分词器解析，解析后再进行查询
两个类型：text（会被分词器解析）和keyword（不会被分词器解析）
GET /products/_doc/_search
{
"query":{
"bool":{
"should":[
{
"term":{
"price":8888
}
},
{
"term":{
"price":5499
}
}
]
}
}
}
返回结果：
{
"took" : 2,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : 1.0,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200040",
"_score" : 1.0,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200040,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "HUAWEi Mate Book 13",
"price" : 8888,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200041",
"_score" : 1.0,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200041,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "IPhone Mate Book 13",
"price" : 5499,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
}
}
]
}
}
高亮查询
如上图所示，百度对于关键字的查询会是红色字体，高亮进行显示，分数越高的数据越靠前。
GET /products/_doc/_search
{
"query":{
"match":{
"name":"Book"
}
},
"highlight": {
"fields": {
"name":{}
}
}
}
返回结果：
{
"took" : 9,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : 0.744874,
"hits" : [
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200040",
"_score" : 0.744874,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200040,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "HUAWEi Mate Book 13",
"price" : 8888,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
},
"highlight" : {
"name" : [
"HUAWEi Mate <em>Book</em> 13"
]
}
},
{
"_index" : "products",
"_type" : "_doc",
"_id" : "200041",
"_score" : 0.744874,
"_source" : {
"brand_id" : 1,
"create_time" : "2021-05-21T00:00:00Z",
"id" : 200041,
"last_time" : "2021-05-21T00:00:00Z",
"long_name" : "HUAWEi Mate Book 13 16G 512G ",
"name" : "IPhone Mate Book 13",
"price" : 5499,
"review_count" : 11111,
"shop_id" : 1,
"sold_count" : 12345,
"status" : 1,
"three_category_id" : 3
},
"highlight" : {
"name" : [
"IPhone Mate <em>Book</em> 13"
]
}
}
]
}
}
2. elasticsearch与mysql数据同步
2.1 go-mysql-elasticsearch简介
go-mysql-elasticsearch是一款开源的高性能的Mysql数据同步ES的工具，其由go语言开发，编译及使用非常简单。go-mysql-elasticsearch的原理很简单，首先使用mysqldump获取当前MySQL的数据，然后在通过此时binlog的name和position获取增量数据，再根据binlog构建restful api写入数据到ES中
注意
-
mysql binlog必须是ROW模式
-
要同步的mysql数据表必须包含主键，否则直接忽略，这是因为如果数据表没有主键，UPDATE和DELETE操作就会因为在ES中找不到对应的document而无法进行同步
-
不支持程序运行过程中修改表结构
安装
- 拉取go-mysql-elasticsearch镜像
docker pull gozer/go-mysql-elasticsearch
- 创建一个目录用于存储配置文件
mkdir /docker/go-mysql-es
cd /docker/go-mysql-es
touch go_mysql_river.toml
文件内容如下：
my_addr = "172.17.0.4:3306" --mysql地址与端口
my_user = "root" --mysql用户
my_pass = "root" --mysql密码
my_charset = "utf8" --字符集
enable-relay = true --
es_addr = "172.17.0.8:9200" --es的地址与端口
es_user = "" --es用户名
es_pass = "" --es密码
data_dir = "/docker/data" --数据存储目录
stat_addr = "127.0.0.1:12800"
stat_path = "/metrics"
server_id = 1001 --
flavor = "mysql" --
mysqldump = "" --备份文件
#skip_master_data = false
bulk_size = 128 --
flush_bulk_time = "200ms"
skip_no_pk_table = false
[[source]]
schema = "lmrs_2008_shops" --同步的数据库
tables = ["lmrs_products"] --同步的表
[[rule]]
schema = "lmrs_2008_shops" --同步的数据库
table = "lmrs_products" --同步的表
index = "products" --同步的es索引
type = "_doc" --同步的es类型
# Only sync following columns
filter = ["id", "name","long_name","brand_id","shop_id","price","sold_count","review_count","status","create_time","last_time","three_category_id"] --哪些字段同步
[rule.filed]
mysql = "three_category_id" --mysql的three_category_id替换es的category_id
elastic = "category_id"
- 构建go-mysql-elasticsearch容器
docker run -p 12345:12345 -d --name go-mysql-es -v /docker/go-mysql-es/go_mysql_river.toml:/config/river.toml:ro --privileged=true gozer/go-mysql-elasticsearch