带有 jackson-datatype-jsr310 版本 2.12.3 的 InvalidDefinitionException

Question

我在使用版本 > 2.12.0 的 jackson jsr310 数据类型方面遇到问题，而这与版本 2.11.4 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，代码运行没有错误。

有什么遗漏吗？

这适用于 2.11.4 及更低版本。

Answer 1

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 版本中会抛出 eException。

JavaTimeModule 必须添加到 ObjectMapper：

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