Elasticsearch (7.5 version) navigation learning

1. maven dependence

2. The official website address

　　A. https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/index.html

　　B. https://www.elastic.co/guide/en/elasticsearch/reference/7.5/index.html

3. environment to build

　　A. Elasticsearch environment to build: https://www.cnblogs.com/ruhuanxingyun/p/11399484.html

　　B. Filebeat environment to build: https://www.cnblogs.com/ruhuanxingyun/p/11414708.html

　　C. Logstash environment to build: https://www.cnblogs.com/ruhuanxingyun/p/11414719.html

4. core Http Api

　　(1) Index APIs: create Index responsible for index creation, deletion, Delete, Get Get etc;

　　　　A. Java code level operations: https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/_index_apis.html

　　　　B. elasticsearch-head / postman / kibana such as the operation: Https://Www.Elastic.Co/guide/en/elasticsearch/reference/7.5/Indices.Html

　　　　C. Reference Example: https://www.cnblogs.com/ruhuanxingyun/p/11429347.html

　　(2) Document APIs: Index responsible for creating an index of documents, delete Delete, Get Get other operations, it is based on a query doc_id;

　　　　A. Java code level operations: https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/java-rest-high-supported-apis.html

　　　　B. elasticsearch-head / postman / kibana such as the operation: Https://Www.Elastic.Co/guide/en/elasticsearch/reference/7.5/Docs.Html

　　　　C. Reference Example: https://www.cnblogs.com/ruhuanxingyun/p/11434385.html

　   (3) Search APIs: query responsible for indexing documents Search, which is based on the query conditions;

　　　　A. Java code level operations: https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/_search_apis.html

　　　　B. elasticsearch-head / postman / kibana such as the operation: Https://Www.Elastic.Co/guide/en/elasticsearch/reference/7.5/Search.Html

　　　　C. Reference Example:

　　(4) Cat APIs: query the index responsible for all kinds of information related to the query;

　　　　A. Java code level operations: execution request - https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/java-rest-low-usage-requests.html , read response - HTTPS : //www.elastic.co/guide/en/elasticsearch/client/java-rest/current/java-rest-low-usage-responses.html

　　　　B. elasticsearch-head / postman / kibana such as the operation: Https://Www.Elastic.Co/guide/en/elasticsearch/reference/7.5/Cat.Html

　　　　C. Reference Example: https://www.cnblogs.com/ruhuanxingyun/p/12174465.html

　　(5) Cluster APIs: cluster responsible for all kinds of information related to the query;

　　　　A. Java code level operations: https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/_cluster_apis.html

　　　　B. elasticsearch-head / postman / kibana such as the operation: Https://Www.Elastic.Co/guide/en/elasticsearch/reference/7.5/Cluster.Html

　　　　C. Reference Example:

　　(6) Query DSL: Structured Query Language

　　　　A. https://www.elastic.co/guide/en/elasticsearch/reference/7.5/query-dsl.html

　　　　B. Reference Example: https://www.cnblogs.com/ruhuanxingyun/p/11322670.html

　　(7) Text analysis: Segmentation

　　　　A. https://www.elastic.co/guide/en/elasticsearch/reference/7.5/analysis.html

　　　　B. Examples of reference:

　　(8) Mapping: Mapping

　　　　A. https://www.elastic.co/guide/en/elasticsearch/reference/7.5/mapping.html

　　　　B. Examples of reference:

　　(9) Aggregations: polymerizing

　　　　A. https://www.elastic.co/guide/en/elasticsearch/reference/7.5/search-aggregations.html

　　　　B. Examples of reference: