Xml内五种字符需要编码

相关问题： https://stackoverflow.com/questions/1091945/what-characters-do-i-need-to-escape-in-xml-documents
相关文档：https://www.w3.org/TR/xml11/#sec-predefined-ent

" "

'  '

<  &lt;

>  &gt;

&  &amp;