[CRUD] GET $ curl -XGET http://localhost:9200:/classes?pretty PUT (인덱스 생성) $ curl -XPUT http://localhost:9200:/classes POST (Document 생성) $ curl -X POST http://localhost:9200:/classes/class/1 -H 'Content-Type: application/json' -d '{"title":"Algorithm","professor":"John"}' #file $ curl -X POST http://localhost:9200:/classes/class/1 -H 'Content-Type: application/json'-d @filename.json UPDATE $ cu..