您可以创建自己的方法来复制属性，而忽略空值。
public static String[] getNullPropertyNames (Object source) { final BeanWrapper src = new BeanWrapperImpl(source); java.beans.PropertyDescriptor[] pds = src.getPropertyDescriptors(); Set<String> emptyNames = new HashSet<String>(); for(java.beans.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);}// then use Spring BeanUtils to copy and ignore null using our functionpublic static void myCopyProperties(Object src, Object target) { BeanUtils.copyProperties(src, target, getNullPropertyNames(src));}
