JSON与JAVA数据的相互转换

net.sf.json.JSONArray;
 net.sf.json.JSONException;
 net.sf.json.JSONObject;
 net.sf.json.JSONSerializer;
    
    
    
    @Test
      jsonToJava(){
        String json="[{"addTime":"2011-09-19 14:23:02","iccid":"1111","id":0,"imei":"2222","imsi":"3333","phoneType":"4444","remark":"aaaa","tel":"5555"}]";
                (json.indexOf("[")!=-1){
            json=json.replace("[", "");
        }
        (json.indexOf("]")!=-1){
            json=json.replace("]", "");
        }
        JSONObject obj= JSONObject().fromObject(json);
        SimInfo simInfo=(SimInfo)JSONObject.toBean(obj, SimInfo.);
        System.out.println("obj: "+simInfo);
        System.out.println(simInfo.getAddTime());
        System.out.println(simInfo.getIccid());
        System.out.println(simInfo.getImei());
        System.out.println(simInfo.getImsi());
        System.out.println(simInfo.getPhoneType());
        System.out.println(simInfo.getRemark());
        System.out.println(simInfo.getTel());
        System.out.println(simInfo.getId());
        
        DaoFactory.getSimInfoDao().add(simInfo);
    }

    
    @Test
      jsonToJavas(){
        String jsons="[{"addTime":"2011-09-19 14:23:02","iccid":"1111","id":0,"imei":"2222","imsi":"3333","phoneType":"4444","remark":"aaaa","tel":"5555"}," +
                     "{"addTime":"2011-11-11 14:23:02","iccid":"2222","id":0,"imei":"2222","imsi":"3333","phoneType":"4444","remark":"aaaa","tel":"5555"}]";
        List<SimInfo> simInfos = getJavaCollection( SimInfo(),jsons);
        System.out.println(simInfos.size());
        (SimInfo simInfo:simInfos){
            System.out.println("addTime: "+simInfo.getAddTime());
            System.out.println("=========");
        }
        
    }

    
     <T> List<T> getJavaCollection(T clazz, String jsons) {
        List<T> objs=;
        JSONArray jsonArray=(JSONArray)JSONSerializer.toJSON(jsons);
        (jsonArray!=){
            objs= ArrayList<T>();
            List list=(List)JSONSerializer.toJava(jsonArray);
            (Object o:list){
                JSONObject jsonObject=JSONObject.fromObject(o);
                T obj=(T)JSONObject.toBean(jsonObject, clazz.getClass());
                objs.add(obj);
            }
        }
         objs;
    }
    
    
    @Test
      javaToJson(){
        SimInfo simInfo= SimInfo();
        simInfo.setAddTime(UtilTool.dateToStr( Date(), ));
        simInfo.setIccid("1111");
        simInfo.setImei("2222");
        simInfo.setImsi("3333");
        simInfo.setPhoneType(4);
        simInfo.setRemark("aaaa");
        simInfo.setTel("5555");
                String json= JSONArray().fromObject(simInfo).toString();
                System.out.println("json: "+json);
    }

StringWriter writer =  StringWriter();
            ObjectMapper mapper =  ObjectMapper();
            mapper.writeValue(writer, simInfo);
            String json=writer.toString();

// 基于json-lib.jar包Json实例程序

String json = "{name="json",bool:true,int:1,double:2.2}";
JSONObject jsonObject = JSONObject.fromObject(json);
Object bean = JSONObject.toBean(jsonObject);
assertEquals(jsonObject.get("name"), PropertyUtils.getProperty(bean, "name"));
assertEquals(jsonObject.get("bool"), PropertyUtils.getProperty(bean, "bool"));
assertEquals(jsonObject.get("int"), PropertyUtils.getProperty(bean, "int"));
assertEquals(jsonObject.get("double"), PropertyUtils.getProperty(bean, "double"));
String json = "{name:"zhangsan",age:25,hight:1.72,sex:true}";
JSONObject jsonObject = JSONObject.fromObject(json);
UserBean bean = (UserBean) JSONObject.toBean(jsonObject, UserBean.);
System.out.println(jsonObject);
理论上，这样就可以了，但时，有异常Caused by: java.lang.NoSuchMethodException: com.json.Json$UserBean.<init>()
             

String json = "["first","second"]";
JSONArray jsonArray = (JSONArray) JSONSerializer.toJSON(json);
List output = (List) JSONSerializer.toJava(jsonArray);
     

String json = "["first","second"]";
JSONArray jsonArray = (JSONArray) JSONSerializer.toJSON(json);
JsonConfig jsonConfig =  JsonConfig();
jsonConfig.setArrayMode(JsonConfig.MODE_OBJECT_ARRAY);
Object[] output = (Object[]) JSONSerializer.toJava(jsonArray, jsonConfig);
Object[] expected =  Object[] { "first", "second" };
ArrayAssertions.assertEquals(expected, output);
5.JSON 字符串 专为 JavaBean（刘慧斌demo 演示需要的jar包在附件里）

String str="[{"id":"328","mestype":"inbox"},{"id":"327","mestype":"inbox"},{"id":"279","mestype":"already"},{"id":"278","mestype":"already"},{"id":"277","mestype":"already"},{"id":"310","mestype":"inbox"},{"id":"308","mestype":"inbox"},{"id":"305","mestype":"inbox"},{"id":"304","mestype":"inbox"},{"id":"303","mestype":"inbox"}]";
  JSONArray  jsonArray=(JSONArray) JSONSerializer.toJSON(str);
  List list=(List)JSONSerializer.toJava(jsonArray);
         (Object  obj: list) {
         JSONObject jsonObject = JSONObject.fromObject(obj);
      MessageBean bean = (MessageBean) JSONObject.toBean(jsonObject, MessageBean.);
   String id=bean.getId()+"";
   String type=bean.getMestype();
   System.out.println(id+" "+type);
  }
  System.out.println(list.size());