生成json对象

JSONObject 对于放入的object，最终生成的json是什么样的？

两个JavaBean:

public class ClassBean {
    private int grade;
    private String className;
    private boolean isExperimentalClass;
    private List students;
//······
}
public class StudentBean {
    private String stuName;
    private int sno;
    private Map scores;
    private List hobby;
//·······
}

对于javeBean 生成JSON

public class JsonTest {
    public static void main(String[] args) {
        ClassBean classBean = new ClassBean();
        List stus = new ArrayList();
        StudentBean stu1 = new StudentBean();
        stu1.setSno(110701);
        stu1.setStuName("JIM");
        Map scores = new HashMap();
        scores.put("math", 95);
        scores.put("chinese", 95);
        scores.put("english", 92);
        stu1.setScores(scores);
        List hobby1 = new ArrayList();
        hobby1.add("run");
        hobby1.add("eat");
        hobby1.add("sleep");
        stu1.setHobby(hobby1);
        stus.add(stu1);
        StudentBean stu2 = new StudentBean();
        stu2.setSno(110702);
        stu2.setStuName("KIM");
        Map scores2 = new HashMap();
        scores2.put("math", 98);
        scores2.put("chinese", 96);
        scores2.put("english", 92);
        stu2.setScores(scores2);
        List hobby2 = new ArrayList();
        hobby2.add("read");
        hobby2.add("play");
        stu2.setHobby(hobby2);
        stus.add(stu2);
        classBean.setClassName("二班");
        classBean.setExperimentalClass(false);
        classBean.setGrade(1);
        classBean.setStudents(stus);
        
        JSONObject jobj = new JSONObject();
        jobj.put("class", classBean);
        System.out.println(jobj.toString());
    }
}

输出的结果：

{
    "class": {
        "className": "二班",
        "experimentalClass": false,
        "grade": 1,
        "students": [
            {
                "hobby": [
                    "run",
                    "eat",
                    "sleep"
                ],
                "scores": {
                    "math": 95,
                    "english": 92,
                    "chinese": 95
                },
                "sno": 110701,
                "stuName": "JIM"
            },
            {
                "hobby": [
                    "read",
                    "play"
                ],
                "scores": {
                    "math": 98,
                    "english": 92,
                    "chinese": 96
                },
                "sno": 110702,
                "stuName": "KIM"
            }
        ]
    }
}