How to globally configure `@DateTimeFormat` pattern in Spring Boot?

user_5391954 0
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Im my Spring Boot application, I have some controllers that accept a date as query parameter:

@RestController
public class MyController {

  @GetMapping
  public ResponseEntity<?> getDataByDate(
      @RequestParam(value = "date") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
      final LocalDate date) {
    return ResponseEntity.ok();
  }
}

This works well, and I can even mark the parameter as optional using @RequestParam(value = "date", required = false) and then use an Optional<LocalDate>. Spring will handle all this and pass an empty Optional when the parameter is missing.

Since I have several controllers using dates as query parameters, I want to configure this behavior for all LocalDate query parameters. I have tried the spring.mvc.date-pattern property, but it only seems to work for java.util.Date.

So after searching the web, the best I came up with is a ControllerAdvice I adopted from this answer. The problem with this solution is, that is can not handle Optional<LocalDate> anymore. It feels like this is the wrong way to configure the behavior in Spring Boot.

So my question is: How do I globally configure the pattern for LocalDate used as query parameters in an idiomatic way in Spring Boot?

spring-boot spring-mvc java
3 Answers

@britter: thanks.

spring.mvc.date-format= # Date format to use. For instance, dd/MM/yyyy works fine with Spring Boot 2.1.0.x

See # SPRING MVC (WebMvcProperties) properties.

UPDATE: But it doen't work for Spring Data Rest params ...

user_5484730

You can use spring.mvc.format.date, spring.mvc.format.time and spring.mvc.format.date-time

For example:
spring.mvc.format.time=HH:mm:ss
spring.mvc.format.date=iso
spring.mvc.format.date-time=iso-offset

as in the example above, you can use shortcuts iso аnd iso-offset from spring boot 2.4.1

user_49065440
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