apache的BeanUtils.copyProperties(from,to)可以实现实体类属性复制,但是空属性不会忽略。在网上找到了一种方法可以忽略空属性
忽略空属性的方法
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);
}
public static void copyPropertiesIgnoreNull(Object src, Object target){
BeanUtils.copyProperties(src, target, getNullPropertyNames(src));
}
//使用
BeanUtils.copyProperties(examLifeStyle, examDetail, getNullPropertyNames(examLifeStyle));