SpringBoot使用Jackson序列化反序列化配置

几种常见方式

1. 全局application配置

常用配置：

spring:
  jackson:
    date-format: yyyy-MM-dd HH:mm:ss
    serialization: true
    deserialization: true
    default-property-inclusion: non_empty
    parser: true

具体配置详见org.springframework.boot.autoconfigure.jackson.JacksonProperties

2. 重新注入ObjectMapper

Jackson配置：
@ConditionalOnClass(ObjectMapper.class)
public class JacksonAutoConfiguration {…}

例：

    @Bean
    @Primary
	@ConditionalOnMissingBean(ObjectMapper.class)
	public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) {
		ObjectMapper objectMapper = builder.createXmlMapper(false).build();
		// 属性为”“或null时不序列化。
		objectMapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
		// 允许未知属性
		objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
		objectMapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
		objectMapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);
		// 字段保留， 讲null转为”“
		objectMapper.getSerializerProvider().setNullValueSerializer(new JsonSerializer