JSON with Java

work with json-lib.jar

import net.sf.json.JSONArray;
import net.sf.json.JSONException;
import net.sf.json.JSONObject;
import net.sf.json.JSONSerializer;


/**
* json对象转换为java对象
*
* @throws JSONException
*/
@Test
public void jsonToJava(){
String json="[{"addTime":"2011-09-19 14:23:02","iccid":"1111","id":0,"imei":"2222","imsi":"3333","phoneType":"4444","remark":"aaaa","tel":"5555"}]";
//接收{}对象，此处接收数组对象会有异常
if(json.indexOf("[")!=-1){
json=json.replace("[", "");
}
if(json.indexOf("]")!=-1){
json=json.replace("]", "");
}
JSONObject obj=new JSONObject().fromObject(json);
SimInfo simInfo=(SimInfo)JSONObject.toBean(obj, SimInfo.class);
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);
}

/**
* 将json转换为java集合对象
*/
@Test
public void 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(new SimInfo(),jsons);
System.out.println(simInfos.size());
for(SimInfo simInfo:simInfos){
System.out.println("addTime: "+simInfo.getAddTime());
System.out.println("=========");
}

}

/**
* 封装将json对象转换为java集合对象
*
* @param <T>
* @param clazz
* @param jsons
* @return
*/
private <T> List<T> getJavaCollection(T clazz, String jsons) {
List<T> objs=null;
JSONArray jsonArray=(JSONArray)JSONSerializer.toJSON(jsons);
if(jsonArray!=null){
objs=new ArrayList<T>();
List list=(List)JSONSerializer.toJava(jsonArray);
for(Object o:list){
JSONObject jsonObject=JSONObject.fromObject(o);
T obj=(T)JSONObject.toBean(jsonObject, clazz.getClass());
objs.add(obj);
}
}
return objs;
}

/**
* java对象转换为json对象
*
* @throws JSONException
*/
@Test
public void javaToJson(){
SimInfo simInfo=new SimInfo();
simInfo.setAddTime(UtilTool.dateToStr(new Date(), null));
simInfo.setIccid("1111");
simInfo.setImei("2222");
simInfo.setImsi("3333");
simInfo.setPhoneType(4);
simInfo.setRemark("aaaa");
simInfo.setTel("5555");
//java对象转换为json对象
String json=new JSONArray().fromObject(simInfo).toString();
//json: [{"addTime":"2011-09-19 14:23:02","iccid":"1111","id":0,"imei":"2222","imsi":"3333","phoneType":"4444","remark":"aaaa","tel":"5555"}]
System.out.println("json: "+json);
}

SOURCE:http://www.cnblogs.com/linjiqin/archive/2011/09/19/2181408.html