解析jsonObject，赋给指定的对象

从JSONObject中解析数据，并赋给给定的对象

public static Object parseBean(JSONObject jsonObject, Object obj) {
  if (jsonObject == null || obj == null) {
   return null;
  }
  Class<? extends Object> clazz = obj.getClass();
  Iterator<?> it = jsonObject.keys();
  Field field = null;
  String key = null;
  try {
   while (it.hasNext()) {
    key = it.next().toString();
    // 获得对应的属性
    field = clazz.getDeclaredField(key);
    // 获得属性对应的值
    Object val = jsonObject.get(key); // 暂不考虑Date类型
    if (field.getType() == Integer.TYPE) {
     val = Integer.parseInt(val.toString());
    } else if(field.getType() == Long.TYPE||field.getType() == Long.class) {
     val = Long.parseLong(val.toString());
    } else if (field.getType() == Date.class) {
     if (field.isAnnotationPresent(DateTimeFormat.class)) {
      String pattern = field.getAnnotation(DateTimeFormat.class).pattern();
      val = DateUtil.parse(val.toString(), pattern);
     } else {
      val = DateUtil.parseDate(val.toString());
     }
    }else if(field.getType() == BigDecimal.class) {
     if (StringUtils.hasText(val.toString())) {
      val = new BigDecimal(val.toString());
     }else{
      val = null;
     }
      
    } 
    // 赋值
    field.setAccessible(true);
    field.set(obj, val);
   }
  } catch (Exception e) {
   e.printStackTrace();
   return null;
  }
  return obj;
 }