fasterxml jackson无法实例化非静态内部类

com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of gy.finolo.Outer$Inner (although at least one Creator exists): can only instantiate non-static inner class by using default, no-argument constructor

fasterxml无法实例化非静态内部类。把内部类改为 static 的静态类就可以了。

@Data
public class Outer {
    
    private Inner inner;
    
    @Data
    public static class Inner {
        
    }
}