英文:
Return ISO-8601 dates with custom ObjectMapper in Spring Boot 2
问题
我希望从我的Spring REST控制器中返回我的LocalDateTime作为ISO-8601字符串（例如"2020-10-12T10:57:15Z"）。这在以前是起作用的，但现在我正在使用自定义的Jackson2 ObjectMapper，这些日期却被返回为数组：[2020, 10, 12, 10, 57, 15, 200000000]。
为什么会发生这种情况，我如何在仍然返回ISO-8601日期的同时自定义ObjectMapper？
英文:
I want my LocalDateTimes to be returned as ISO-8601 strings (e.g. "2020-10-12T10:57:15Z") from my Spring REST Controllers. This has worked previously, but now that I'm using a custom Jackson2 ObjectMapper these dates are instead being returned as arrays: [2020, 10, 12, 10, 57, 15, 200000000].
Why is this happening and how can I customize the ObjectMapper while still returning ISO-8601 dates?
答案1
得分: 0
JacksonAutoConfiguration创建一个带有WRITE_DATES_AS_TIMESTAMPS功能关闭的ObjectMapper，该功能会将LocalDateTimes返回为ISO-8601字符串。当您提供自定义的ObjectMapper时，会关闭此默认自动配置。
您可以通过提供Jackson2ObjectMapperBuilderCustomizer来解决这个问题，而不是提供自定义的ObjectMapper。这个bean将被JacksonAutoConfiguration用来自定义ObjectMapper，同时保持自动配置的行为，如关闭WRITE_DATES_AS_TIMESTAMPS功能。
@Configuration
public class Config {
@Bean
public Jackson2ObjectMapperBuilderCustomizer objectMapperBuilderCustomizer() {
return jacksonObjectMapperBuilder -> {
// 在保持自动配置的同时自定义ObjectMapper
};
}
}
英文:
JacksonAutoConfiguration creates an ObjectMapper with the WRITE_DATES_AS_TIMESTAMPS feature turned off, which returns LocalDateTimes as ISO-8601 strings. When you provide a custom ObjectMapper this default auto-configuration is turned off.
This can be solved by, instead of providing a custom ObjectMapper, providing a Jackson2ObjectMapperBuilderCustomizer. This bean will be used by JacksonAutoConfiguration to customize the ObjectMapper while maintaining the auto-configured behaviour such as turning off the WRITE_DATES_AS_TIMESTAMPS feature.
@Configuration
public class Config {
@Bean
public Jackson2ObjectMapperBuilderCustomizer objectMapperBuilderCustomizer() {
return jacksonObjectMapperBuilder -> {
// Customize the ObjectMapper while maintaining the auto-configuration
};
}
}
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