【工具】 - BeanUtils增强篇
public class BeanPlusUtils extends BeanUtils {
public static <S, T> List<T> copyListProperties(List<S> sources, Supplier<T> target) {
return copyListProperties(sources, target, null);
}
public static <S, T> T copySingleProperties(S source, Supplier<T> target) {
return copySingleProperties(source, target, null);
}
/**
* 使用场景:Entity、Bo、Vo层数据的复制,因为BeanUtils.copyProperties只能给目标对象的属性赋值,却不能在List集合下循环赋值,因此添加该方法
* 如:List<AdminEntity> 赋值到 List<AdminVo> ,List<AdminVo>中的 AdminVo 属性都会被赋予到值
* S: 数据源类 ,T: 目标类::new(eg: AdminVo::new)
*/
public static <S, T> List<T> copyListProperties(List<S> sources, Supplier<T> target,
ColaBeanUtilsCallBack<S, T> callBack) {
if (CollectionUtils.isEmpty(sources)){
return new ArrayList<>();
}
List<T> list = new ArrayList<>(sources.size());
for (S source : sources) {
T t = target.get();
copyProperties(source, t);
list.add(t);
if (callBack != null) {
// 回调
callBack.callBack(source, t);
}
}
return list;
}
public static <S, T> T copySingleProperties(S source, Supplier<T> target, ColaBeanUtilsCallBack<S, T> callBack) {
T t = target.get();
copyProperties(source, t);
if (callBack != null) {
// 回调
callBack.callBack(source, t);
}
return t;
}
@FunctionalInterface
public interface ColaBeanUtilsCallBack<S, T> {
void callBack(S t, T s);
}
/**
* 将集合对象中的类型转换成另一种类型
*
* @param collection 集合
* @param clazz 目标对象
* @param <T>
* @return
*/
public static <T> Collection<T> covertObject(Collection<?> collection, Class<T> clazz) {
Collection<T> newCollection = collection.stream().map(oldObject -> {
T instance = null;
try {
instance = clazz.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
BeanUtils.copyProperties(oldObject, instance);
return instance;
}).collect(Collectors.toList());
return newCollection;
};
}