Started tomcat in the morning and found that it could not be started, and reported an error: Error creating document instance. Cause: org.xml.sax.SAXParseException. It seems that there is an error in XML parsing, but no configuration file has been changed. Later, I found that I wrote an SQL last night, but I didn't test it. Open it because " < " and " > " are used in mybatis . It is estimated that there is a problem with mysql parsing. Solution:
1. Use transfer characters instead
| < | < |
| > | > |
| & | & |
| ' | ‘ |
| " | “ |
2. Use the <![CDATA[sql ]]> tag
例如： select * from table where
<![CDATA[
id <= 3 ]]>