SpringBoot项目不返回值为null的字段

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自定义配置类，注入ObjectMapper

  • 代码

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    @Configuration
    public class JacksonConfig {

        @Bean
        @Primary
        @ConditionalOnMissingBean(ObjectMapper.class)
        public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) {
            ObjectMapper objectMapper = builder.createXmlMapper(false).build();
            objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
            return objectMapper;
        }
        
    }

  • 测试

    配置前：

    配置后：