jackson-datatype-jsr310版本2.12.3出现InvalidDefinitionException

Question

我使用版本>时遇到jackson jsr310数据类型问题；2.12.0，而这与2.11.4版本完美配合。

这是我的POJO:

import java.time.OffsetDateTime;
public class Pojo {
OffsetDateTime aDateTime;
public OffsetDateTime getaDateTime() {
return aDateTime;
}
public void setaDateTime(OffsetDateTime aDateTime) {
this.aDateTime = aDateTime;
}
}

弹簧应用：

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import java.time.Instant;
import java.time.ZoneOffset;
@SpringBootApplication
public class OffsetTimeTestApplication {
public static void main(String[] args) {
SpringApplication.run(OffsetTimeTestApplication.class, args);
}
public OffsetTimeTestApplication() {
ObjectMapper mapper = new ObjectMapper();
Pojo pojo = new Pojo();
pojo.setaDateTime(Instant.now().atOffset(ZoneOffset.UTC));
try {
mapper.writeValueAsString(pojo);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
}
}

我的build.gradle文件中的相关部分：

dependencies {
implementation 'org.springframework.boot:spring-boot-starter'
implementation group: 'com.fasterxml.jackson.core', name: 'jackson-core', version: '2.12.3'
implementation group: 'com.fasterxml.jackson.core', name: 'jackson-annotations', version: '2.12.3'
implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.12.3'
runtimeOnly group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-jsr310', version: '2.12.3'
developmentOnly 'org.springframework.boot:spring-boot-devtools'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

我得到的例外是：

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Java 8 date/time type `java.time.OffsetDateTime` not supported by default: add Module "com.fasterxml.jackson.datatype:jackson-datatype-jsr310" to enable handling (through reference chain: com.enervalis.offsettimetest.Pojo["aDateTime"])
at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77)
at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1276)
at com.fasterxml.jackson.databind.ser.impl.UnsupportedTypeSerializer.serialize(UnsupportedTypeSerializer.java:35)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:728)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:770)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at com.fasterxml.jackson.databind.ObjectMapper._writeValueAndClose(ObjectMapper.java:4487)
at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3742)
at com.enervalis.offsettimetest.OffsetTimeTestApplication.<init>(OffsetTimeTestApplication.java:24)
at com.enervalis.offsettimetest.OffsetTimeTestApplication$$EnhancerBySpringCGLIB$$f83afa20.<init>(<generated>)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:212)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1308)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1214)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:438)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:337)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1336)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1325)
at com.enervalis.offsettimetest.OffsetTimeTestApplication.main(OffsetTimeTestApplication.java:16)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)

将构建文件中的版本从2.12.3更改为2.11.4，代码运行时不会出错。

有什么东西不见了吗？

这适用于2.11.4及更低版本。

Answer 1

此问题已解决。

显然，通过添加依赖项，但不注册JavaTimeModule，OffsetDateTime在旧版本中被序列化为POJO。在>2.11.4版本th引发eException。

必须将JavaTimeModule添加到ObjectMapper:

ObjectMapper mapper = JsonMapper.builder()
.addModule(new JavaTimeModule())
.build();