Springboot统一配置Jackson

经常要为接口响应对象设置属性，序列化的时候是不是包含空值，反序列化的时候是否忽略不认识的字段。所以，必须要手动制定ObjectMapper或者在类上声明

@JsonInclude(Include.NON_NULL)

@JsonIgnoreProperties(ignoreUnknown = true)

虽然不算复杂，但既然统一了规则，那就来个统一设定吧。

在springboo1.5+以上的版本可以这么设置Jackson的一些属性配置

spring:

  jackson:

    serialization:

      WRITE_DATES_AS_TIMESTAMPS: false

    default-property-inclusion: non_null

更多配置参见 org.springframework.boot.autoconfigure.jackson.JacksonProperties

@ConfigurationProperties(

    prefix = "spring.jackson"

)

public class JacksonProperties {

    private String dateFormat;

    private String jodaDateTimeFormat;

    private String propertyNamingStrategy;

    private Map<SerializationFeature, Boolean> serialization = new HashMap();

    private Map<DeserializationFeature, Boolean> deserialization = new HashMap();

    private Map<MapperFeature, Boolean> mapper = new HashMap();

    private Map<Feature, Boolean> parser = new HashMap();

    private Map<com.fasterxml.jackson.core.JsonGenerator.Feature, Boolean> generator = new HashMap();

    private Include defaultPropertyInclusion;

    private TimeZone timeZone = null;

    private Locale locale;

    //省略

}

LocalDateTime统一序列化

配置类

@Configuration

public class LocalDateTimeSerializerConfig {

    @Value("${spring.jackson.date-format:yyyy-MM-dd HH:mm:ss}")

    private String pattern;

    @Bean

    public LocalDateTimeSerializer localDateTimeDeserializer() {

        return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(pattern));

    }

    @Bean

    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {

        return builder -> builder.serializerByType(LocalDateTime.class, localDateTimeDeserializer());

    }

}

配置文件

spring:

  profiles:

    active: dev

  jackson:

    default-property-inclusion: non_null

    date-format: "yyyy-MM-dd HH:mm:ss"

    joda-date-time-format: "yyyy-MM-dd HH:mm:ss"

    time-zone: "Asia/Shanghai"

    serialization:

      WRITE_DATES_AS_TIMESTAMPS: false

单独jackson注解修改特殊的序列化