英文:
How to configure Jackson deserializer for Retrofit2 responses via Jackson2ObjectMapperBuilderCustomizer class?
问题
我正在使用Retrofit2在Spring Batch应用程序中调用远程Web服务，为了反序列化JSON响应，我想通过Jackson2ObjectMapperBuilderCustomizer类配置全局Jackson反序列化器。
我的配置是：
- Spring Boot版本3.0.6
- Retrofit版本2.9.0
- Jackson版本2.13.5
我已经尝试在Jackson2ObjectMapperBuilder对象中定义ObjectMapper配置，它可以工作，但我仍然需要在每个RetrofitBuilder()调用上指定.addConverter(JacksonConverterFactory.create(<builder>)：
@Configuration
public class MyRestWSImpl {
@Bean
MyRestWS myRestWS (@Value("${url}") String url) {
return new RetrofitBuilder()
.url(url)
.addConverter(JacksonConverterFactory.create(
new Jackson2ObjectMapperBuilder()
.deserializers(new LocalDateTimeDeserializer(MY_DATE_TIME_FORMATTER))
.build()
)
.client()
.configure()
.build()
.create(MyRestWS.class);
}
}
我正在寻找更好的选项。是否有一种方法可以通过使用Jackson2ObjectMapperBuilderCustomizer功能接口来实现相同的结果？
我尝试定义一个类型为Jackson2ObjectMapperBuilderCustomizer的Bean，如此处所示，但似乎Retrofit2并没有考虑到这个Bean，尽管该Bean已经被创建：
@Configuration
public class JacksonConfig {
@Bean
Jackson2ObjectMapperBuilderCustomizer jsonCustomizer() {
return builder -> builder
.deserializers(new LocalDateTimeDeserializer(MY_DATE_TIME_FORMATTER));
}
}
控制台输出：
DefaultSingletonBeanRegistry : Creating shared instance of singleton bean 'jsonCustomizer'
...
com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.time.LocalDateTime` from String "2023-05-26 17:04:52"
英文:
I am using Retrofit2 to call distant web services in a Spring Batch application, and for deserializing JSON responses I would like to configure a global Jackson deserializer via the Jackson2ObjectMapperBuilderCustomizer class.
My configuration is:
- Spring Boot version 3.0.6
- Retrofit version 2.9.0
- Jackson version 2.13.5
I've already tried to define ObjectMapper configuration in a Jackson2ObjectMapperBuilder object and it works, but I still need to specify .addConverter(JacksonConverterFactory.create(<builder>) on each RetrofitBuilder() call:
@Configuration
public class MyRestWSImpl {
@Bean
MyRestWS myRestWS (@Value("${url}") String url) {
return new RetrofitBuilder()
.url(url)
.addConverter(JacksonConverterFactory.create(
new Jackson2ObjectMapperBuilder()
.deserializers(new LocalDateTimeDeserializer(MY_DATE_TIME_FORMATTER))
.build()
)
.client()
.configure()
.build()
.create(MyRestWS.class);
}
}
I'm searching for a better option.
Is there a way in which I can achieve the same result by using the Jackson2ObjectMapperBuilderCustomizer functional interface instead?
I tried to define a bean of type Jackson2ObjectMapperBuilderCustomizer as seen here, but it does not seem to be taken into account by Retrofit2, although the bean is created:
@Configuration
public class JacksonConfig {
@Bean
Jackson2ObjectMapperBuilderCustomizer jsonCustomizer() {
return builder -> builder
.deserializers(new LocalDateTimeDeserializer(MY_DATE_TIME_FORMATTER));
}
}
Console:
DefaultSingletonBeanRegistry : Creating shared instance of singleton bean 'jsonCustomizer'
...
com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.time.LocalDateTime` from String "2023-05-26 17:04:52"
答案1
得分: 0
如果您想使用自定义器，您应该将 Jackson2ObjectMapperBuilder 注入到您的 bean 中，并使用它来构建对象映射器。
例如：
@Bean
SonarqubeClient sonarqubeClient(SonarqubeProperties sonarqubeProperties, Jackson2ObjectMapperBuilder objectMapperBuilder) {
ObjectMapper objectMapper = objectMapperBuilder.build();
英文:
If you want to use the customizer, you should inject a Jackson2ObjectMapperBuilder into your bean and use it to build the object mapper.
e.g.
@Bean
SonarqubeClient sonarqubeClient(SonarqubeProperties sonarqubeProperties, Jackson2ObjectMapperBuilder objectMapperBuilder) {
ObjectMapper objectMapper = objectMapperBuilder.build();
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