java方式的將java對象以及list或者map轉化為json資料 .

public class Test {public static void main(String[] args) {//當是對象的時候Student student = new Student();student.setAge(18);student.setName("zhangsan");student.setSex("male");JSONObject jsonObject = JSONObject.fromObject(student);System.out.println(jsonObject);//輸出{"age":18,"name":"zhangsan","sex":"male"}//當是數組或list的時候Student[] stus = new Student[5];List<Student> stuList = new ArrayList<Student>();for (int i = 0; i < stus.length; i++) {stus[i] = new Student();stus[i].setAge(i*10+8);stus[i].setName("zhang"+i);stus[i].setSex("male");//添加到list,一會兒用stuList.add(stus[i]);}JSONArray jsonArray = JSONArray.fromObject(stus);System.out.println(jsonArray);//和下面列印的結果相同//結果：[{"age":8,"name":"zhang0","sex":"male"},{"age":18,"name":"zhang1","sex":"male"},{"age":28,"name":"zhang2","sex":"male"},{"age":38,"name":"zhang3","sex":"male"},{"age":48,"name":"zhang4","sex":"male"}]JSONArray jsonArrayFromList = JSONArray.fromObject(stuList);System.out.println(jsonArrayFromList);//和上面列印的結果相同//當既有對象又有數組的時候Map<String,Object> map = new HashMap<String,Object>();Teacher teacher = new Teacher();teacher.setAge(30);teacher.setName("laoshi");teacher.setSex("male");map.put("teacher", teacher);map.put("student", stuList);JSONObject jsonObjectFromMap = JSONObject.fromObject(map);System.out.println(jsonObjectFromMap);//結果：//{"student":[{"age":8,"name":"zhang0","sex":"male"},{"age":18,"name":"zhang1","sex":"male"},{"age":28,"name":"zhang2","sex":"male"},{"age":38,"name":"zhang3","sex":"male"},{"age":48,"name":"zhang4","sex":"male"}],"teacher":{"age":30,"name":"laoshi","sex":"male"}}}}