使用toString进行rapidxml序列化并使用String构造函数进行反序列化

Question

我有一个POJO,看起来像这样:

public class Thing
{
   private final int x;
   private final int y;
   private final int z;

   public Thing(String strThing)
   {
       // parse strThing which is in some arbitrary format to set x, y and z
   }

   @Override
   public String toString()
   {
       // return a string representation of thing
       // (same format as that parsed by the constructor)
   }

   @Override
   public boolean equals(Object obj) ...

   @Override
   public int hashCode() ...

}

我希望将它用作映射的键​​(例如HashMap<Thing, SomeOtherPOJO>),当序列化为json时,使用Thing的toString()表示键,并且在反序列化时使用String构造函数.这可能是使用像jackson数据绑定注释这样简单的东西吗？解决这个问题的最佳方法是什么？

Answer 1

通过实验(我认为的文件可能是一个更清晰一点上这个)我发现我可以用JsonCreator注释的String构造函数和JsonValue对toString()的方法来达到我想要的东西:

public class Thing
{
   private final int x;
   private final int y;
   private final int z;

   @JsonCreator
   public Thing(String strThing)
   {
       // parse strThing which is in some arbitrary format to set x, y and z
   }

   @Override
   @JsonValue
   public String toString()
   {
       // return a string representation of thing
       // (same format as that parsed by the constructor)
   }

   @Override
   public boolean equals(Object obj) ...

   @Override
   public int hashCode() ...

}