Nothing is wrong with this code at all; it's just that instead of persisting XML, you really persist data and stuff it in XML, all in one step.

这段代码并没有任何错误；我们只是将数据持久化存储于 XML 中，所有操作都在一步之内完成。

youdao

Nothing is wrong with me. What's wrong with you?

我没怎么，你怎么回事儿？

youdao

In other words, there is nothing nefarious about Ugland House, just as there is nothing wrong with the small building in Delaware that is home to more than 200, 000 companies.

FORBES: Why Tax Havens Are A Force For Good

There is nothing wrong with the government restricting advertising to children, nor is there anything wrong with a big corporation like Disney voluntarily restraining child-focused marketing.

BBC: Viewpoint: Childhood obesity and passive parenting

There is nothing wrong with self-confidence - when it is coupled with restraint, modesty and willingness to accept guidance from those with more experience even if you don't feel you need it.

BBC: Young people and self-esteem: Your views