Basic operation of Elastic search API

1. Corresponding relationship with relational database

Relational database	Elasticsearch
Database	Index Library
Table Table	Type Type
Data row Row	Document
Data Column	Field Field
Model Schema	Image Mapping

ES Restful API GET, POST, PUT, DELETE, HEAD Meaning:
1) GET: Gets the current state of the requesting object.
2) POST: Change the current state of the object.
3) PUT: Create an object.
4) DELETE: Destroy the object.
5) HEAD: Request the basic information of the object.

2. Index

Equivalent to a database

Create index

http://localhost:9200/{index}
PUT              http://localhost:9200/hello

Delete index

http://localhost:9200/{index}
DELETE              http://localhost:9200/hello

3,mapping

Create index and mapping

http://localhost:9200/{index}

put: http://localhost:9200/hello2
{
    "mappings": {
        "article": {
            "properties": {
                "id": {
                	"type": "long",
                    "store": true,
                    "index":"true"
                },
                "title": {
                	"type": "text",
                    "store": true,
                    "index":"true",
                    "analyzer":"standard"
                },
                "content": {
                	"type": "text",
                    "store": true,
                    "index":"true",
                    "analyzer":"standard"
                }
            }
        }
    }
}

Set Mapping after Index Creation

http://localhost:9200/{index}/{type}/_mapping

POST	http://localhost:9200/hello/type_test/_mapping

{
    "hello": {
            "properties": {
                "id":{
                	"type":"long",
                	"store":true
                },
                "title":{
                	"type":"text",
                	"store":true,
                	"index":true,
                	"analyzer":"standard"
                },
                "content":{
                	"type":"text",
                	"store":true,
                	"index":true,
                	"analyzer":"standard"
                }
            }
        }
  }

4, document

http://localhost:9200/{index}/{type}/{_id}

4.1 New Documents

http://localhost:9200/{index}/{type}/{_id}

post Can not be set_id.es Automatically generated, not recommended
put/post  http://localhost:9200/hello/article/1

{
	"id":1,
	"title":"ElasticSearch It is based on Lucene Search Server",
	"content":"It provides a full-text search engine based on distributed multi-user capabilities. RESTful web Interface. Elasticsearch Is used Java Developed and acted as Apache Open source publishing under licensing terms is a popular enterprise search engine. Design for cloud computing, can achieve real-time search, stable, reliable, fast, easy to install and use."
}

4.2 Modify document

http://localhost:9200/{index}/{type}/{_id}
POST	localhost:9200/blog1/article/1
//Request body:
{
	"id":1,
	"title":"[Amendment] ElasticSearch It is based on Lucene Search Server",
	"content":"[It provides a full-text search engine with distributed multi-user capabilities, based on RESTful web Interface. Elasticsearch Is used Java Developed and acted as Apache Open source publishing under licensing terms is a popular enterprise search engine. Design for cloud computing, can achieve real-time search, stable, reliable, fast, easy to install and use."
}

4.3 Delete document

http://localhost:9200/{index}/{type}/{_id}

DELETE	localhost:9200/blog1/article/1

4.4 Document Query

4.4.1 Find by id

http://localhost:9200/{index}/{type}/{_id}

GET	localhost:9200/blog1/article/1

4.4.2 querystring query

First participle, then query, including participle will be queried out

POST	localhost:9200/blog1/article/_search

{
    "query": {
        "query_string": {
            "default_field": "title",
            "query": "Search Server"
        }
    }
}

4.4.2 term query

Represents a perfect match, that is, without word segmentation, the document must contain the entire search term

POST	localhost:9200/blog1/article/_search

{
    "query": {
        "term": {
            "title": "search"
        }
    }
}