/**

     * 解析对象形式的json字符串

     */

    public static void test1() {

        String jsonStr = "{\"JACKIE_ZHANG\":\"张学友\",\"ANDY_LAU\":\"刘德华\",\"LIMING\":\"黎明\",\"Aaron_Kwok\":\"郭富城\"}";

        JSONObject jsonObject = JSONObject.parseObject(jsonStr);

        System.out.println(jsonObject.get("JACKIE_ZHANG"));

        System.out.println(jsonObject.get("ANDY_LAU"));

        System.out.println(jsonObject.get("LIMING"));

        System.out.println(jsonObject.get("Aaron_Kwok"));

    }

    /**

     * 解析集合形式的json字符串

     */

    public static void test2() {

        String jsonStr = "[{\"JACKIE_ZHANG\":\"张学友\"},{\"ANDY_LAU\":\"刘德华\"},{\"LIMING\":\"黎明\"},{\"Aaron_Kwok\":\"郭富城\"}]";

        JSONArray jsonArray = JSONArray.parseArray(jsonStr);

        JSONObject jsonObject = JSONObject.parseObject(jsonArray.get(0)+"");

        System.out.println(jsonObject.get("JACKIE_ZHANG"));

    }

    /**

     *  将对象转换为JSON字符串

     */

    public static void test3() {

        UserInfo info = new UserInfo();

        info.setName("zhangsan");

        info.setAge(24);

        String str_json = JSON.toJSONString(info);

        System.out.println("JSON=" + str_json);

    }

    /**

     * 将复杂的字符串转换成字符串

     */

    public static void test4() {

        HashMap<String, Object> map = new HashMap<String, Object>();

        map.put("username", "zhangsan");

        map.put("age", 24);

        map.put("sex", "男");

        // map集合

        HashMap<String, Object> temp = new HashMap<String, Object>();

        temp.put("name", "xiaohong");

        temp.put("age", "23");

        map.put("girlInfo", temp);

        // list集合

        List<String> list = new ArrayList<String>();

        list.add("爬山");

        list.add("骑车");

        list.add("旅游");

        map.put("hobby", list);

        String jsonString = JSON.toJSONString(map);

        System.out.println("JSON=" + jsonString);

    }

    /**

     * 将json字符串转换成bean对象

     */

    public static void test5() {

        String json = "{\"name\":\"chenggang\",\"age\":24}";

        UserInfo userInfo = JSON.parseObject(json, UserInfo.class);

        System.out.println("name:" + userInfo.getName() + ", age:" + userInfo.getAge());

    }

    /** 泛型的反序列化 */

    public static void test6() {

        String json = "{\"user\":{\"name\":\"zhangsan\",\"age\":25}}";

        Map<String, UserInfo> map = JSON.parseObject(json, new TypeReference<Map<String, UserInfo>>() {

        });

        System.out.println(map.get("user").getAge());

    }

    /**

     * 时间的序列化

     */

    public static void test7() {

        Date date = new Date();

        // 输出毫秒值

        System.out.println(JSON.toJSONString(date));

        // 默认格式为yyyy-MM-dd HH:mm:ss

        System.out.println(JSON.toJSONString(date, SerializerFeature.WriteDateUseDateFormat));

        // 根据自定义格式输出日期

        System.out.println(JSON.toJSONStringWithDateFormat(date, "yyyy-MM-dd", SerializerFeature.WriteDateUseDateFormat));

    }