两种办法：
https://blog.csdn.net/m15814478834/article/details/49902077
https://www.cnblogs.com/iriczhao/p/11710693.html
QT 使用QDomDocument::setContent()读XML文件总是返回false
https://www.cnblogs.com/Zoya-/p/13176631.html
2021-10-04 23:56:10
两种办法：
https://blog.csdn.net/m15814478834/article/details/49902077
https://www.cnblogs.com/iriczhao/p/11710693.html
https://www.cnblogs.com/Zoya-/p/13176631.html