How to use @DateTimeFormat to format Date Time request param in SpringBoot RestAPI Examples

springboot-restapi-datetimeformat-feature-image

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In the tutorial, we show how to work with DateTime request param in SpringBoot RestAPI using @DateTimeFormat.

@DateTimeFormat with DateTime Request Param

@DateTimeFormat is used to declare a field or method parameter should be formatted as a date or time.

We can use @DateTimeFormat with ISO date time pattern, or custom format pattern string:

– Common ISO enum value: DATE, TIME, DATE_TIME

  • DATE: yyyy-MM-dd, example 2019-03-28
  • TIME: HH:mm:ss.SSSXXX, example 01:30:00.000-05:00
  • DATE_TIME: yyyy-MM-dd'T'HH:mm:ss.SSSXXX, example 2019-03-28T01:30:00.000+07:00

Example @DateTimeFormat with @RequestParam in Spring RestAPI:

@GetMapping("/date/v1")
public String dateTimeApiV1(
		@RequestParam("date") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) Date date,
		@RequestParam("localdate") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) LocalDate localdate, 
		@RequestParam("localdatetime") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime localdatetime) {

– Custom format pattern string:

Example:

@GetMapping("/date/v2")
public String dateTimeApiV2(
		@RequestParam("date") @DateTimeFormat(pattern="yyyy.MM.dd") Date date,
		@RequestParam("localdate") @DateTimeFormat(pattern="yyyy.MM.dd") LocalDate localdate, 
		@RequestParam("localdatetime") @DateTimeFormat(pattern="yyyy.MM.dd HH:mm:ss") LocalDateTime localdatetime) {

Practice

Create SpringBoot project

We create a SpringBoot project as below:

D:\gkz\article\SpringBoot-DateTimeFormat-RestAPI

– Dependency:


	org.springframework.boot
	spring-boot-starter-web

Create DateTime RestAPIs

– RestAPIs.java:

package com.ozenero.springboot.controller;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.Date;

import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api")
public class RestAPIs {

	@GetMapping("/date/v1")
	public String dateTimeApiV1(
			@RequestParam("date") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) Date date,
			@RequestParam("localdate") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) LocalDate localdate, 
			@RequestParam("localdatetime") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime localdatetime) {
		
		System.out.println(date);
		System.out.println(localdate);
		System.out.println(localdatetime);
		
		return "Done"; 
	}
	
	@GetMapping("/date/v2")
	public String dateTimeApiV2(
			@RequestParam("date") @DateTimeFormat(pattern="yyyy.MM.dd") Date date,
			@RequestParam("localdate") @DateTimeFormat(pattern="yyyy.MM.dd") LocalDate localdate, 
			@RequestParam("localdatetime") @DateTimeFormat(pattern="yyyy.MM.dd HH:mm:ss") LocalDateTime localdatetime) {
		
		System.out.println(date);
		System.out.println(localdate);
		System.out.println(localdatetime);
		
		return "Done"; 
	}	
}

Run & Check Results

Run SpringBoot project ->
– Request 1 with ISO format pattern:

SpringBoot-RestAPI-DateTimeFormat-project-structure-request-iso-pattern

-> Logs in SpringBoot app:

Fri Aug 23 07:00:00 GMT+07:00 2019
2019-09-12
2019-10-29T01:30

– Request 2 with Custom format pattern:

SpringBoot-RestAPI-DateTimeFormat-project-structure-request-custom-pattern

-> Logs in SpringBoot app:

Fri Aug 23 00:00:00 GMT+07:00 2019
2019-09-12
2019-10-29T12:01:23

Sourcecode

SpringDateTimeFormatExamples

Conclusion

We had learned how to use @DateTimeFormat to format Date Time request param in SpringBoot RestAPI with:

  • ISO date time pattern
  • Custom date time format pattern string

Happy Learning! See you later!

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