Format JSON LocalDate with SpringBoot

To format an input and output LocalDate with SpringBoot, you can use the @DateTimeFormat annotation provided by Spring Framework.

Here is an example of how to use @DateTimeFormat to format a LocalDate field in a SpringBoot application:

import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.web.bind.annotation.*;

@RestController
public class MyController {

    @GetMapping("/my-endpoint")
    public String myEndpoint(@RequestParam("date") @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate date) {
        // use the date parameter here
        return "Received date: " + date.toString();
    }
}

In the above example, the @DateTimeFormat annotation is used to specify the pattern for the input date, which is expected to be in the format “yyyy-MM-dd”. The LocalDate parameter will be automatically parsed from the input using the specified pattern.

Similarly, you can use @DateTimeFormat to format a LocalDate field in a response object as well. Here’s an example:

import org.springframework.format.annotation.DateTimeFormat;

public class MyResponse {

    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private LocalDate date;

    // getter and setter
}

In this example, the @DateTimeFormat annotation is used to specify the pattern for the output date, which will be formatted as a string in the specified format when returned as part of the MyResponse object.