ES基础入门

1、ES倒排索引

数据库记录 DOCID代表主键

ES倒排索引 （二次查找）

a、对搜索的字段进行分词，关键词映射到对应数据库主键

 

 

 b、ES对关键词进行分词，例如搜索”苹果手机“被分为”苹果“和”手机“

 

 苹果匹配度>手机匹配度，ES根据匹配结果做排序，最终搜索结果展示

 

 

2、ES概念

 

 

 INDEX: 相当于表

 DOC: JSON对象

 FIED: JSON对象的字段

MAPPING：DOC的JSON结构

 

3、测试

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1	curl -X POST "localhost:9200/_analyze?pretty" -H 'Content-Type: application/json' -d '{ "analyzer": "ik_smart", "text": "中国人民共和国" }'  #验证分词功能

　　

创建INDEX

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PUT http://192.168.110.128:9200/sku HTTP/1.1 User-Agent: Fiddler Host: 192.168.110.128:9200 Content-Type: application/json Content-Length: 441   {         "mappings": {                 "properties": {                         "sku_id": {                                 "type": "long"                         },                         "title": {                                 "type": "text",                                 "analyzer": "ik_max_word",                                 "search_analyzer": "ik_max_word"                         }                 }         } }   HTTP/1.1 200 OK content-type: application/json; charset=UTF-8 content-length: 62   {"acknowledged":true,"shards_acknowledged":true,"index":"sku"}

插入DOC

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POST http://192.168.110.128:9200/sku/_doc/ HTTP/1.1 User-Agent: Fiddler Host: 192.168.110.128:9200 Content-Type: application/json Content-Length: 112   { "sku_id": 100002860826, "title": "烟台红富士苹果 5kg 一级铂金大果 单果230g以上 新鲜水果"}   POST http://192.168.110.128:9200/sku/_doc/ HTTP/1.1 User-Agent: Fiddler Host: 192.168.110.128:9200 Content-Type: application/json Content-Length: 125   { "sku_id": 100000177760, "title": "苹果 Apple iPhone XS Max (A2104) 256GB 金色 移动联通电信4G手机 双卡双待"}

关键词查询

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POST http://192.168.110.128:9200/sku/_search?pretty HTTP/1.1 User-Agent: Fiddler Host: 192.168.110.128:9200 Content-Type: application/json Content-Length: 54   { "query" : { "match" : { "title" : "苹果手机" }}}<br><br>

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HTTP/1.1 200 OK content-type: application/json; charset=UTF-8 content-length: 891   {   "took" : 533,   "timed_out" : false,   "_shards" : {     "total" : 1,     "successful" : 1,     "skipped" : 0,     "failed" : 0   },   "hits" : {     "total" : {       "value" : 2,       "relation" : "eq"     },     "max_score" : 0.8594865,     "hits" : [       {         "_index" : "sku",         "_type" : "_doc",         "_id" : "uHyovYABUSVWsq2vBibk",         "_score" : 0.8594865,         "_source" : {           "sku_id" : 100000177760,           "title" : "苹果 Apple iPhone XS Max (A2104) 256GB 金色 移动联通电信4G手机 双卡双待"         }       },       {         "_index" : "sku",         "_type" : "_doc",         "_id" : "t3ynvYABUSVWsq2v0yZU",         "_score" : 0.18577608,         "_source" : {           "sku_id" : 100002860826,           "title" : "烟台红富士苹果 5kg 一级铂金大果 单果230g以上 新鲜水果"         }       }     ]   } }