RandomAccessSubList未序列化
问题描述：
我正在尝试获取List的子列表，但是我希望该子列表被序列化.我发现，当我们从ArrayList获取子列表时，该子列表未序列化.
I am trying to get a sublist of a List but I want the sublist to be serialized. I found out that when we get sublist from an ArrayList the sublist is not serialized.
要克服这一点，这就是我正在做的事情:
To overcome this, this is what I am doing:
ArrayList serializedSublist = new ArrayList();
//getQuestions() returns RandomAccessSubList
getQuestions().addAll(serializedSublist);
//problem is in the line below. serializedSublist is empty.
getRequest().getSession().setAttribute("questionsForUser", serializedSublist);
问题是，尽管第3行getQuestions()返回了列表，但第5行中的serializedSubList为空.
Problem is that serializedSubList is empty in line 5, eventhough in line 3 getQuestions() returns a list back.
答
您正在向后添加它，不是吗?不应该吧
You're adding it backwards, no? Shouldn't it be
serializedSublist.addAll(getQuestions());
或者更好
ArrayList serializedSublist = new ArrayList(getQuestions());