============问题描述============
============解决方案1============
[
{
"grade": "2015级",
"classes": [
{"id": 5, "class": "1班"}
]
},
{
"grade": "2016级",
"classes": [
{"id": 2, "class": "1班"},
{"id": 3, "class": "2班"},
{"id": 4, "class": "3班"}
]
}
]
class Class {
int id;
String name;
}
class Grade {
String name;
ArrayList<Class> classes;
}
ArrayList<Grade> grades = new ArrayList<Grade>();
原文：http://www.cnblogs.com/shaochuyun57/p/4033869.html