Jackson构建器模式从父级获取值

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;

public class Parent {
    private String name;
    private Child child;

    // Getters and setters

    public static class Child {
        private String name;
        private String parentName;

        @JsonCreator
        public Child(@JsonProperty("name") String name, @JsonProperty("parentName") String parentName) {
            this.name = name;
            this.parentName = parentName;
        }

        // Getters and setters
    }
}

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;

public class Parent {
    private String name;
    private Child child;

    // Getters and setters

    public static class Child {
        private String name;
        private String parentName;

        @JsonCreator
        public Child(@JsonProperty("name") String name, @JsonProperty("parentName") String parentName) {
            this.name = name;
            this.parentName = parentName;
        }

        // Getters and setters

        public static class Builder {
            private String name;
            private String parentName;

            public Builder name(String name) {
                this.name = name;
                return this;
            }

            public Builder parentName(String parentName) {
                this.parentName = parentName;
                return this;
            }

            public Child build() {
                return new Child(name, parentName);
            }
        }
    }

    public Child createChild(String childName) {
        return new Child.Builder()
                .name(childName)
                .parentName(this.name)
                .build();
    }
}