訪問Java嵌套從FreeMarker的模板類

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; 
    } 
} 

假設MyModel是myModel在FTL訪問，爲什麼myModel.someData.toJson或myModel.getSomeData().toJson()失敗，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必須是公開的，否則其成員將不會公開。