Feign 远程调用报错: jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of xxxxx

2020年6月7日

今天使用远程调用报错:  jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of xx

过程:
     debug 后发现,调用的数据中含有  null 值

原因:

　　jackson 序列化时,遇到 null 值会出错

解决:

     配置 jackson 配置类中设置 为 NON_NULL

 

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