es download address
IK word segmenter download address

Index

Create index
Compared with relational databases, creating an index is equivalent to creating a database
```
  PUT请求
  http://127.0.0.1:9200/shopping
```
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Query index

  GET请求
  http://127.0.0.1:9200/shopping

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Query all indexes

  GET请求
  http://127.0.0.1:9200/_cat/indices?v

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Delete index

  DELETE请求
  http://127.0.0.1:9200/shopping

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Document

The index has been created. Next, we create the document and add data. The document here can be compared to table data in a relational database, and the added data format is JSON format

Create document

  POST请求
  http://127.0.0.1:9200/shopping/_doc #写法一
  http://127.0.0.1:9200/shopping/_create # 写法二  {"name":"商品"}

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  PUT请求，主键必须幂等性
  http://127.0.0.1:9200/shopping/_doc/1001 #写法一
  http://127.0.0.1:9200/shopping/_create/1002 # 写法二  {"name":"商品"}

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  POST请求 ，创建自定义id
  http://127.0.0.1:9200/shopping/_doc/1001

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Primary key query

  GET请求
  http://127.0.0.1:9200/shopping/_doc/1001

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Full query

  GET请求
  http://127.0.0.1:9200/shopping/_search

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Full modification

  PUT请求
  http://127.0.0.1:9200/shopping/_doc/1001
  {"name":"商品"}

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Partial modification

  POST请求
  http://127.0.0.1:9200/shopping/_update/1001
  {"doc":{"name":"局部修改商品"}}

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Delete

  DELETE请求
  http://127.0.0.1:9200/shopping/_doc/1001

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Query

Conditional query

  GET请求，方法一
  http://127.0.0.1:9200/shopping/_search?q=category:小米
  http://127.0.0.1:9200/shopping/_search?q=name:商品

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  GET请求，方法二（推荐）
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "match":{
              "category":"小米"
          }
      }
  }

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Full query

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "match_all":{
          }
      }
  }

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Paging query (from, size)

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "match_all":{
          }
      },
      "from":0,#起始位置/偏移量 ,公式：（页码-1）* 每页数据条数      "size":10,#每页查询10条  }

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Specify field paging query (_source)

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "match_all":{
          }
      },
      "from":0,#起始位置/偏移量 ,公式：（页码-1）* 每页数据条数      "size":10,#每页查询10条      "_source":["title"]
  }

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Query sorting (sort)

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "match_all":{
          }
      },
      "from":0,#起始位置/偏移量 ,公式：（页码-1）* 每页数据条数      "size":10,#每页查询10条      "_source":["title"],
      "sort":{
          "price":{
              "order":"desc"
          }
      }
  }

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Multi-condition query

and query (must)

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "bool":{
              "must":[ 
                  {
                      "match":{
                          "category":"小米"
                      }
                  },
                  {
                      "match":{
                          "price":1999.00
                      }
                  }
              ]
          }
      }
  }

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or query (should)

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "bool":{
              "should":[ 
                  {
                      "match":{
                          "category":"小米"
                      }
                  },
                  {
                      "match":{
                          "price":1999.00
                      }
                  }
              ]
          }
      }
  }

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Range query (filter, range)

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "bool":{
              "should":[
                  {
                      "match":{
                          "category":"小米"
                      }
                  },
                  {
                      "match":{
                          "price":1999.00
                      }
                  }
              ],
              "filter":{
                  "range":{
                      "price":{
                          "gt":5000
                      }
                  }
              }
          }
      }
  }

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Full text search matching (word segmentation) (match)

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "match":{
              "category": "小华"
          }
      }
  }

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Exact match (match_phrase)

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "match_phrase":{
              "category": "小华"
          }
      }
  }

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Highlight query (hightlight, add html tags to the results)

  GET请求
  http://127.0.0.1:9200/shopping/_search  {
      "query":{
          "match_phrase":{
              "category": "小华"
          }
      },
      "hightlight":{
          "fields":{
              "category":{}
          }
      }
  }

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Aggregation query

Return statistics and raw data

  GET请求
  http://127.0.0.1:9200/shopping/_search  { 
      "aggs":{ #聚合操作          "price_group":{ #名称，随意起名              "terms":{ #分组                  "field":"price" #分组字段              }
          }
      }，  }

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Close raw data (size)

  GET请求
  http://127.0.0.1:9200/shopping/_search      { 
      "aggs":{ #聚合操作          "price_group":{ #名称，随意起名              "terms":{ #分组                  "field":"price" #分组字段              }
          }
      }，      "size":0
  }

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Average

  GET请求
  http://127.0.0.1:9200/shopping/_search      { 
      "aggs":{ #聚合操作          "price_avg":{ #名称，随意起名              "age":{ #平均值                  "field":"price" #分组字段              }
          }
      }，      "size":0
  }

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Mapping relationship

Create mapping

  PUT请求
  http://127.0.0.1:9200/user/_mapping  { 
      "properties":{
          "name":{
              "type":"text", #全文检索分词查询              "index":true
          },
          "sex":{
              "type":"keyword",#完全查询              "index":true
          },
          "tel":{
              "type":"keyword",#不能查询              "index":false
          }
      }
  }

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Query mapping

  GET请求
  http://127.0.0.1:9200/user/_mapping

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Add data

  PUT请求
  http://127.0.0.1:9200/user/_create/1001
  {
      name:"小米",
      sex:"男的",
      tel:"10010"
  }

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Query data

  GET请求
  http://127.0.0.1:9200/user/_search  {
      "query":{
          "match": {
              name:"小"
          }
      }
  }

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  GET请求
  http://127.0.0.1:9200/user/_search  {
      "query":{
          "match": {
              sex:"男" #查询不到，必须输入男的          }
      }
  }

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  #不支持查询  GET请求
  http://127.0.0.1:9200/user/_search  {
      "query":{
          "match": {
              tel:"10010" 
          }
      }
  }

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