public class BeanUtil{
public static <T> T transfrom(Class<T> clazz, Object src) {
if (src == null) {
return null;
}
T instance = null;
try {
instance = clazz.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
org.springframework.beans.BeanUtils.copyProperties(src, instance, getNullPropertyNames(src));
return instance;
}
private static String[] getNullPropertyNames(Object source) {
// 忽略null 赋值
final BeanWrapper src = new BeanWrapperImpl(source);
PropertyDescriptor[] pds = src.getPropertyDescriptors();
Set<String> emptyNames = new HashSet<String>();
for (PropertyDescriptor pd : pds) {
Object srcValue = src.getPropertyValue(pd.getName());
if (srcValue == null) emptyNames.add(pd.getName());
}
String[] result = new String[emptyNames.size()];
return emptyNames.toArray(result);
}
public static void main(String[] args) {
User user = new User();
user.setPerson(new Person());
user.setBaseId(1);
UserDto transfrom = BeanUtil.transfrom(UserDto.class, user);
System.out.println(transfrom.toString());
}
}
