In the XML file, the error in the header is as follows

At the beginning of the query, it was said that “& lt;?XML version =” 1.0 “encoding =” UTF-8 “?& gt;” was missing in the header, but I didn’t have this problem, which may be encountered by someone.

And this error does not affect the operation of the project, of course, it may be that I did not notice or did not write the relevant reference code.

Now I know that the original reason is that the tool is relatively new and may lack tags. Just add the & lt; XML body & gt; tag

That’s good

Reproduced in: https://www.cnblogs.com/zhangyuanbo/p/11250563.html