ContributionsMost RecentMost LikesSolutionsSpring code gen [Server] not formatting dates properly I'm using the codegen tool in swaggerhub to generate Spring server-side code stubs. I have a openapi field with the following structure: birthdate: type: string format: date pattern: "YYYY-MM-DD" example: "1995-01-01" i've set the swagger export configuration to use Java 11 JSR384 and use Jackson. However, the generated code is not formatting the output properly. Instead of getting a date value in the format of "YYYY-MM-DD" i am getting a long/integer in the json output. I've also confirmed the generated source code is using java.util.Date. Am i missing a crucial configuration step? I can work around the issue by adding the following annotation to the generated code. But that is an issue since it means I am altering auto-generated code (e.g. brittle/risky) @JsonProperty("birthdate") @JsonFormat (shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd") private Date birthdate = null; Solved