[英]How to globally remove attribute from Jackson JSON serialization?
I have an object graph that contains objects that are (for purposes of this example) subclasses of type Foo. 我有一个对象图,其中包含一些对象(出于本示例的目的)是Foo类型的子类。 The Foo class has an attribute on it called bar that I do not want to be serialized with my object graph. Foo类上有一个称为bar的属性,我不想与我的对象图序列化。 So basically I want a way to say, whenever you serialize an object of type Foo, output everything but bar. 因此,基本上我想说一种方法,每当序列化Foo类型的对象时,输出除bar以外的所有内容。
class Foo { // this is an external dependency
public long getBar() { return null; }
}
class Fuzz extends Foo {
public long getBiz() { return null; }
}
public static void main(String[] args) {
ObjectMapper mapper = new ObjectMapper();
// I want to set a configuration on the mapper to
// exclude bar from all things that are type Foo
Fuzz fuzz = new Fuzz();
System.out.println(mapper.writeValueAsString(fuzz));
// writes {"bar": null, "biz": null} what I want is {"biz": null}
}
Thanks, Ransom 谢谢,赎金
Edit: Used StaxMan suggestion, including code that I would end up using (and made bar a getter for example's sake) 编辑:使用了StaxMan建议,包括我最终将使用的代码(例如,使bar成为getter)
interface Mixin {
@JsonIgnore long getBar();
}
class Example {
public static void main() {
ObjectMapper mapper = new ObjectMapper();
mapper.getSerializationConfig().addMixInAnnotations(Foo.class, Mixin.class);
Fuzz fuzz = new Fuzz();
System.out.println(mapper.writeValueAsString(fuzz));
// writes {"biz": null} whoo!
}
}
Aside from @JsonIgnore
or @JsonIgnoreProperties
(esp. via Mix-in Annotations ), you can also define specific types to be globally ignored with '@JsonIgnoreType'. 除了@JsonIgnore
或@JsonIgnoreProperties
(尤其是通过混入注释 ),您还可以定义特定的类型,以使用'@JsonIgnoreType'全局忽略。 For third-party types, this too can be applied as a mix-in annotation. 对于第三方类型,也可以将其用作混合注释。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.