将map数据转化为json数据

//将map数据转化为json数据
            JSONObject json = new JSONObject();
            Iterator<Map.Entry<String, TbTrackScaleReceiveDepartment>> entries =
                    tbTrackScaleReceiveDepartmentMap.entrySet().iterator();
            while (entries.hasNext()) {
                Map.Entry<String, TbTrackScaleReceiveDepartment> entry = entries.next();
                json.put(entry.getKey(),entry.getValue());
            }
            System.out.println(json.toString());

 

Java中Json转Map方法

public void readJSON2Map() {
    try {
        fail("==============JSON Arry String >>> Java Map ==================");
        json = "{\"arr\":[\"a\",\"b\"],\"A\":{\"address\":\"address\",\"birthday\":{\"birthday\":\"2010-11-22\"}," + "\"email\":\"email\",\"id\":1,\"name\":\"jack\"},\"int\":1," + "\"B\":{\"address\":\"address\",\"birthday\":{\"birthday\":\"2010-11-22\"}," + "\"email\":\"email\",\"id\":1,\"name\":\"jack\"},\"name\":\"json\",\"bool\":true}";
        jsonObject = JSONObject.fromObject(json);
        Map < String,Class < ?>>clazzMap = new HashMap < String, Class < ?>>();
        clazzMap.put("arr", String[].class);
        clazzMap.put("A", Student.class);
        clazzMap.put("B", Student.class);
        Map < String,?>mapBean = (Map) JSONObject.toBean(jsonObject, Map.class, clazzMap);
        System.out.println(mapBean);

        Set < String > set = mapBean.keySet();
        Iterator < String > iter = set.iterator();
        while (iter.hasNext()) {
            String key = iter.next();
            fail(key + ":" + mapBean.get(key).toString());
        }
    } catch(Exception e) {
        e.printStackTrace();
    }
}

public void json2map() {
    String json1 = "{'arr':['a','b'],'int':1,'name':'json','bool':true}";
    JSONObject jsonObject1 = JSONObject.fromObject(json1);
    Map typeMap1 = new HashMap();
    typeMap1.put("arr", String[].class);
    typeMap1.put("int", Integer.class);
    typeMap1.put("name", String.class);
    typeMap1.put("bool", Boolean.class);
    Map output1 = (Map) JSONObject.toBean(jsonObject1, Map.class, typeMap1);
    System.out.println("Map");
    System.out.println(output1.size());
    System.out.println(output1.get("name"));
    System.out.println(output1.get("arr"));
    String json2 = "{'k1':{'age':10,'sex':'男','userName':'xiapi1'},'k2':{'age':12,'sex':'女','userName':'xiapi2'}}";
    JSONObject jsonObject2 = JSONObject.fromObject(json2);
    Map < String,Class < ?>>typeMap2 = new HashMap < String,Class < ?>>();
    Map < String,Student > output2 = (Map < String, Student > ) JSONObject.toBean(jsonObject2, Map.class, typeMap2);
    System.out.println("Map<String,Student>");
    System.out.println(output2.size());
    System.out.println(output2.get("k1"));
}