Jackson:如何在不修改POJO的情况下向JSON添加自定义属性

I am developing a REST interface for my app using Jackson to serialize my POJO domain objects to JSON representation. I want to customize the serialization for some types to add additional properties to the JSON representation that do not exist in POJOs (e.g. add some metadata, reference data, etc). I know how to write my own I am developing a REST interface for my app usi