java 如何在全局范围内使用 spring 配置 jackson？
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How to configure Hymanson with spring globally?
提问by Nabil Sham
To serialize deserialize object I am useing Hymanson as flow
为了序列化反序列化对象，我使用 Hymanson 作为流程
@JsonSerialize(using = LocalDateSerializer.class)
@JsonDeserialize(using = LocalDateDeserializer.class)
private LocalDate openingDate
How do I make this the default globally so I do not have to add it to every property ?
如何将其设为全局默认值，以便不必将其添加到每个属性中？
Using XML configuration.
使用 XML 配置。
回答by Manu
If you are using Java-based configuration, you can create your configuration class extending WebMvcConfigurerAdapter and do the following:
如果您使用基于 Java 的配置，您可以创建扩展 WebMvcConfigurerAdapter 的配置类并执行以下操作：
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
final MappingHymanson2HttpMessageConverter converter = new MappingHymanson2HttpMessageConverter();
final ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
converter.setObjectMapper(objectMapper);
converters.add(converter);
super.configureMessageConverters(converters);
}
In here, you can configure the ObjectMapper as you like and set it as a converter.
在这里，您可以根据需要配置 ObjectMapper 并将其设置为转换器。
回答by Jaiwo99
Well you can install modules for using things like java datetime or jodatime. checkout this:
好吧，您可以安装模块以使用诸如 java datetime 或 jodatime 之类的东西。结帐这个：
@Bean
Hymanson2ObjectMapperBuilder Hymanson2ObjectMapperBuilder() {
JavaTimeModule module = new JavaTimeModule();
module.addSerializer(OffsetDateTime.class, JSR310DateTimeSerializer.INSTANCE);
module.addSerializer(ZonedDateTime.class, JSR310DateTimeSerializer.INSTANCE);
module.addSerializer(LocalDateTime.class, JSR310DateTimeSerializer.INSTANCE);
module.addSerializer(Instant.class, JSR310DateTimeSerializer.INSTANCE);
module.addDeserializer(LocalDate.class, JSR310LocalDateDeserializer.INSTANCE);
return new Hymanson2ObjectMapperBuilder()
.featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
.findModulesViaServiceLoader(true)
.modulesToInstall(module);
}
回答by Laksitha Ranasingha
You can use configure your serializers (providing fully qualified class name) in spring Hymanson2ObjectMapperFactoryBeanthen bind it with MappingHymanson2HttpMessageConverter. Here is an example XMLconfiguration snippet:
您可以在 spring 中使用配置序列化程序（提供完全限定的类名），Hymanson2ObjectMapperFactoryBean然后将其与 MappingHymanson2HttpMessageConverter. 这是一个示例XML配置片段：
<bean class="org.springframework.http.converter.json.MappingHymanson2HttpMessageConverter">
<property name="objectMapper">
<bean class="org.springframework.web.context.support.Hymanson2ObjectMapperFactoryBean"
p:failOnEmptyBeans="false"
p:indentOutput="true">
<property name="serializers">
<array>
<bean class="LocalDateSerializer" />
</array>
</property>
</bean>
</property>
</bean>
The linkto the documentation
该链接的文档
回答by Jan Kopecky
With Spring Boot you can achieve this by registering new Module.
使用 Spring Boot，您可以通过注册 new 来实现这一点Module。
@Configuration
public class AppConfig {
@Bean
public Module module() {
SimpleModule module = new SimpleModule("Module", new Version(1, 0, 0, null, null, null));
module.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer());
module.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer());
return module;
}
}
As stated in documentation here
正如文件指出这里
Hymanson 1.7 added ability to register serializers and deserializes via Module interface. This is the recommended way to add custom serializers -- all serializers are considered "generic", in that they are used for subtypes unless more specific binding is found.
Hymanson 1.7 添加了通过 Module 接口注册序列化器和反序列化的能力。这是添加自定义序列化程序的推荐方法——所有序列化程序都被认为是“通用的”，因为它们用于子类型，除非找到更具体的绑定。
and here:
和这里：
Any beans of type
com.fasterxml.Hymanson.databind.Moduleare automatically registered with the auto-configuredHymanson2ObjectMapperBuilderand are applied to anyObjectMapperinstances that it creates. This provides a global mechanism for contributing custom modules when you add new features to your application.
任何类型的 beans 都会
com.fasterxml.Hymanson.databind.Module自动注册到 auto-configuredHymanson2ObjectMapperBuilder并应用于ObjectMapper它创建的任何实例。当您向应用程序添加新功能时，这提供了用于贡献自定义模块的全局机制。
