Zson is a library for reading and writing json in Java. Its designed to be simple and light, yet complete.
//Serialize
List<SomeBean> list=new ArrayList<SomeBean>();
String json=new JsonSerializer().prettyFormat(2).ignoreNull(false)
.dateFormat("yyyy-MM-dd").serialize(list);
//Deserilize
Type type=new TypeReference<List<SomeBean>>(){}.getType();
List<SomeBean> result=(List<SomeBean>)new JsonDeserializer().deserialize(json,type);