java - 使用 Jackson 序列化时合并两个类属性

Question

考虑这些类:

public class A {
  private String a;
  private B b;
}

public class B {
  private String b1;
  private String b2;
}

有没有一种方法可以使用 Jackson 序列化 A 的对象，而不使用自定义序列化程序，以便结果为:

{"a":"aaa", "b1":"bbb1", "b2":"bbb2"}

？

Answer 1

您可以简单地使用 @JsonUnwrapped现场

Annotation used to indicate that a property should be serialized "unwrapped"; that is, if it would be serialized as JSON Object, its properties are instead included as properties of its containing Object.

public class A {

     private String a;

     @JsonUnwrapped
     private B b;
}

public class B {

     private String b1;

     private String b2;

}