spring-boot - Jackson - 通过 Jackson2ObjectMapperBuilderCustomizer 配置集合覆盖

Question

我在我的 Spring Boot 配置中通过构建一个新的映射器来自定义我的 Jackson 对象映射器中的集合处理

@Configuration
public class Config {

@Autowired(required = true)
public void objectMapper(ObjectMapper mapper) {

    mapper.configOverride(Collection.class).setInclude(JsonInclude.Value.construct(JsonInclude.Include.NON_EMPTY, null));
    mapper.configOverride(List.class).setInclude(JsonInclude.Value.construct(JsonInclude.Include.NON_EMPTY, null));
    mapper.configOverride(Map.class).setInclude(JsonInclude.Value.construct(JsonInclude.Include.NON_EMPTY, null));

}

虽然这可行，但我知道更优雅的方法是使用 Jackson2ObjectMapperBuilderCustomizer :

@Bean
public Jackson2ObjectMapperBuilderCustomizer customizeJackson2ObjectMapper() {
    return new Jackson2ObjectMapperBuilderCustomizer() {

        @Override
        public void customize(Jackson2ObjectMapperBuilder builder) {
            builder
            .indentOutput(true)
            .someOtherMethod(...)

        }
    };
}

如何通过 Jackson2ObjectMapperBuilder 实现上面的 ObjectMapper 集合调整？

Answer 1

您可以使用本地定义的简单 Module，如 this other use case . SetupContext 也有一个 configOverride() 方法，就像 ObjectMapper 本身一样。