package com.test;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import net.sf.json.JSONArray;import net.sf.json.JSONObject;public class Test {    public static void main(String[] args) {        new Test().test1();        new Test().test2();        new Test().test3();        new Test().test4();        new Test().test5();        new Test().test6();        new Test().test7();    }    /**     * JSON字符串转JSONObject对象     */    public void test1() {        String jsonStr = "{\"name\":\"ZhangSan\",\"sex\":\"boy\",\"age\":18}";        JSONObject jsonObj = JSONObject.fromObject(jsonStr);        System.out.println(jsonObj.toString());    }    /**     * 简单JSONObject对象转java对象     */    public void test2() {        JSONObject jsonObj = new JSONObject();        jsonObj.put("name", "LiSi");        jsonObj.put("sex", "girl");        jsonObj.put("age", 17);        Student student = (Student) JSONObject.toBean(jsonObj, Student.class);        System.out.println(student.getName() + " | " + student.getSex() + " | " + student.getAge());    }    /**     * 复杂JSONObject对象转java对象     */    @SuppressWarnings("rawtypes")    public void test3() {        List<Student> students = new ArrayList<Student>();        students.add(new Student("ZhangSan", "boy", 18));        students.add(new Student("LiSi", "girl", 17));        BanJi banji = new BanJi();        banji.setBanJiName("日语二班");        banji.setStudents(students);        JSONObject jsonObj = JSONObject.fromObject(banji);        Map<String, Class> classMap = new HashMap<String, Class>();        classMap.put("students", Student.class);        BanJi banji2 = (BanJi) JSONObject.toBean(jsonObj, BanJi.class, classMap);        System.out.println(banji2.getStudents().get(0).getName()); // 验证转换是否成功    }    /**     * 简单java集合对象转JSONArray     */    public void test4() {        List<Student> students = new ArrayList<Student>();        students.add(new Student("ZhangSan", "boy", 18));        students.add(new Student("LiSi", "girl", 17));        JSONArray jsonArray = JSONArray.fromObject(students);        System.out.println(jsonArray.toString());    }    /**     * JSONArray转java集合对象     */    @SuppressWarnings({ "unchecked", "deprecation" })    public void test5() {        JSONObject jsonObj1 = new JSONObject();        jsonObj1.put("name", "ZhangSan");        jsonObj1.put("sex", "boy");        jsonObj1.put("age", 18);        JSONObject jsonObj2 = new JSONObject();        jsonObj2.put("name", "lisi");        jsonObj2.put("sex", "girl");        jsonObj2.put("age", 17);        JSONArray jsonArray = new JSONArray();        jsonArray.add(0, jsonObj1);        jsonArray.add(1, jsonObj2);        List<Student> students3 = JSONArray.toList(jsonArray, Student.class);        System.out.println(students3.get(0).getName());        System.out.println(students3.get(1).getName());    }    /**     * 复杂java集合对象转JSONArray     */    @SuppressWarnings({ "rawtypes", "unchecked", "deprecation" })    public void test6() {        BanJi banji1 = new BanJi();        banji1.setBanJiName("日语一班");        List<Student> students1 = new ArrayList<Student>();        students1.add(new Student("ZhangSan", "boy", 18));        banji1.setStudents(students1);        BanJi banji2 = new BanJi();        banji2.setBanJiName("日语二班");        List<Student> students2 = new ArrayList<Student>();        students1.add(new Student("LiSi", "girl", 17));        banji2.setStudents(students2);        List<BanJi> banjiList = new ArrayList<BanJi>();        banjiList.add(banji1);        banjiList.add(banji2);        JSONArray jsonArray = JSONArray.fromObject(banjiList);        Map<String, Class> classMap = new HashMap<String, Class>();        classMap.put("students", Student.class);        List<BanJi> banjiList2 = JSONArray.toList(jsonArray, BanJi.class, classMap);        System.out.println(banjiList2.get(0).getStudents().get(0).getName());    }    /**     * 拆分JSONArray为JSONObject     */    public void test7() {        JSONObject jsonObj1 = new JSONObject();        jsonObj1.put("name", "ZhangSan");        jsonObj1.put("sex", "boy");        jsonObj1.put("age", 18);        JSONObject jsonObj2 = new JSONObject();        jsonObj2.put("name", "lisi");        jsonObj2.put("sex", "girl");        jsonObj2.put("age", 17);        JSONArray jsonArray = new JSONArray();        jsonArray.add(0, jsonObj1);        jsonArray.add(1, jsonObj2);        JSONObject object = (JSONObject) jsonArray.get(0);        System.out.println(object.toString());    }}

package com.test;import java.util.List;/** * 班级类 */public class BanJi {    private String banJiName; // 班级名    private List<Student> students; // 学生    /**     * 构造函数     */    public BanJi() {        super();    }    // getters/setters(略)}

package com.test;/** * 学生类 */public class Student {    private String name; // 姓名    private String sex; // 性别    private int age; // 年龄    /**     * 构造函数     */    public Student() {        super();    }    /**     * 构造函数     */    public Student(String name, String sex, int age) {        super();        this.name = name;        this.sex = sex;        this.age = age;    }    // getters/setters(略)}