如何通过自定义 JsonSerializer 传递上下文？（Java，ObjectMapper）

Question

我有自定义的 JsonSerializer：

new JsonSerializer<T>() {

    @Override

    public void serialize(T instance, JsonGenerator gen, SerializerProvider sp) throws IOException, JsonProcessingException

    {

        try {

            instance = someFunction(instance);

            SerializableString serializableString = new SerializedString(defaultMapper.writeValueAsString(instance));

            gen.writeRawValue(serializableString);

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

对于我的 Pourpuses，我需要一种方法来传递gen.getOutputContext()到defaultMapper.writeValueAsString(instance). 有没有办法实现这一目标？或者我是否以错误的方式使用 ObjectMapper？感谢您的任何见解。

编辑：defaultMapper是类型ObjectMapper。

Answer 1

该ObjectMapper居然有正是我需要建在方法- ObjectMapper.writeValue(JsonGenerator, T)。来自我的问题的修改（和功能）代码：new JsonSerializer<T>() {&nbsp; &nbsp; @Override&nbsp; &nbsp; public void serialize(T instance, JsonGenerator gen, SerializerProvider sp) throws IOException, JsonProcessingException&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; try {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; instance = someFunction(instance);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; defaultMapper.writeValue(gen, instance)&nbsp; &nbsp; &nbsp; &nbsp; } catch (Exception e) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; e.printStackTrace();&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }}