Example jpa rest for store json to database and return json

Sometimes there is a need to save JSON to the database and return the result as JSON and not as a string

Configuration

For main and test dirs: cp application.properties.dist application.properties

Code in dir: /src/main/java/hello/json

See example use: /src/main/java/hello/entity/customField/Employee.java

see: /src/test/java/hello/controller/customField/EmployeeControllerTest.java