对于Spring Boot 1.2.3,如何在JSON序列化中设置ignore null值？

Question

在Spring Boot 1.2.3中,我们可以通过属性文件自定义Jackson ObjectMapper.但是我没有找到一个属性可以设置Jackson在将Object序列化为JSON字符串时忽略null值.

spring.jackson.deserialization.*= # see Jackson's DeserializationFeature
spring.jackson.generator.*= # see Jackson's JsonGenerator.Feature
spring.jackson.mapper.*= # see Jackson's MapperFeature
spring.jackson.parser.*= # see Jackson's JsonParser.Feature
spring.jackson.serialization.*=

我想存档相同的代码,如

ObjectMapper mapper = new ObjectMapper();
mapper.setSerializationInclusion(Include.NON_NULL);

Answer 1

将以下行添加到您的application.properties文件中.

spring.jackson.default属性模型 - 包裹体= non_null

对于2.7之前的Jackson版本:

spring.jackson.serialization系夹杂物= non_null

Answer 2

在弃用之前,这是一个很好的解决方案: @JsonSerialize(include=JsonSerialize.Inclusion.NON_NULL)

但现在你应该使用:

@JsonInclude(JsonInclude.Include.NON_NULL) public class ClassName { ...

你可以看看这里:https: //fasterxml.github.io/jackson-annotations/javadoc/2.7/com/fasterxml/jackson/annotation/JsonInclude.Include.html

Answer 3

对于Spring Boot 1.4.x,您可以在application.properties中包含以下行

spring.jackson.default-property-inclusion=non_null

Answer 4

这是对Spring Boot 1.3.0的增强。

• 支持spring.jackson.include
• 为Jackson序列化添加属性

因此，不幸的是，您需要在1.2.3上以编程方式对其进行配置

@JsonSerialize(include=JsonSerialize.Inclusion.NON_NULL)
public class Shop {
    //...
}

Answer 5

类范围的,

@JsonInclude(JsonInclude.Include.NON_NULL)
public class MyModel { .... }

物业范围:

public class MyModel {   
    .....

    @JsonInclude(JsonInclude.Include.NON_NULL)
    private String myProperty;

    .....
}