According to the Current SpringBoot Reference Guide if I set the spring.jackson.date-format
property, it will: Date format string or a fully-qualified date format class name. For instance 'yyyy-MM-dd HH:mm:ss'
.
However, it doesn't work this way with Spring Boot 1.5.3.
To demonstrate, starting with this class:
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.time.Instant;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
@RestController
class NowController{
@GetMapping("/now")
Instant getNow(){
return Instant.now();
}
}
and this src/main/resources/application.properties
spring.jackson.date-format=dd.MM.yyyy
and this build.gradle
:
buildscript {
ext {
springBootVersion = '1.5.3.RELEASE'
}
repositories {
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
}
}
apply plugin: 'org.springframework.boot'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8
repositories {
mavenCentral()
}
dependencies {
compile('org.springframework.boot:spring-boot-starter-web')
compile('com.fasterxml.jackson.datatype:jackson-datatype-jdk8')
compile('com.fasterxml.jackson.datatype:jackson-datatype-jsr310')
testCompile('org.springframework.boot:spring-boot-starter-test')
}
I get the following:
http localhost:8080/now
HTTP/1.1 200
Content-Type: application/json;charset=UTF-8
Date: Tue, 25 Apr 2017 22:37:58 GMT
Transfer-Encoding: chunked
"2017-04-25T22:37:58.319Z"
Notice that this is not the specified format dd.MM.yyyy
. Is there something else required is spring.jackson.date-format
not working as documented?
That property is only used for the java.util.Date
serialization and not java.time.*
classes.
You can have on demand (per field) format specified with @JsonFormat(pattern="dd.MM.yyyy")
or
Create a bean that implements the org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer
interface and setup custom serializers on the ObjectMapper for java.time.*
classes that use a more sensible format.