事故代码
List<Long> tagList = Arrays.asList(ArrayUtils.toObject(tagIds));
List<Long> pointIds = pointDao.findIds();
tagList.removeAll(pointIds);
这个时候报错
java.lang.UnsupportedOperationException
解决方法,加一次封装
List<Long> originalIds = Arrays.asList(ArrayUtils.toObject(tagIds));
List<Long> pointIds = pointDao.findIds();
//取差集
List<Long> tagList = new ArrayList<>(originalIds);
tagList.removeAll(pointIds);