访问Java嵌套从FreeMarker的模板类

Question

public class MyModel { 

    private final com.google.gson.Gson gson = new Gson(); 
    private final SomeData someData = new SomeData(); 

    private class SomeData extends JsonModel() { 
    String text = "text"; 
    } 

    private class JsonModel() { 
    public String toJson() { 
     return gson.toJson(this); 
    } 
    } 

    public SomeData getSomeData() { 
    return someData; 
    } 
} 

假设MyModel是myModel在FTL访问，为什么myModel.someData.toJson或myModel.getSomeData().toJson()失败，The following has evaluated to null or missing: myModel.someData.toJson或The following has evaluated to null or missing: myModel.getSomeData().toJson()？

Answer 1

JsonModel必须是公开的，否则其成员将不会公开。