JSON转化对象时，日期字符串转化为Date

JSONObject jsonObject=JSONObject.fromObject(contract);
String[] dateFormats = new String[] {"yyyy-MM-dd"};  
//注册日期转化格式
JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(dateFormats)); 		
//json字符串转化为java对象
Map map = new HashMap();
map.put("tmptype", TMMPInfo.class); 
map.put("extaList", TMMPExta.class); 
TMPersonalHotContract tmpCcontract=(TMPersonalHotContract)JSONObject.toBean(jsonObject, TMPersonalHotContract.class,map);
return tmpCcontract;