The reference to entity "characterencoding" must end with the '; ' Delimiter (Mybatis + Mysql)

There was a problem when the data source configuration was added with the Encoding conversion format:

The reference to entity "characterencoding" must end with the '; ' delimiter

This error is the problem of setting the URL of the data source link in Context.xml

<context-param>

<param-name>url</param-name>

<param-value>jdbc:mysql://localhost:3306/bookstore?useunicode=true&characterencoding=utf-8</ Param-value>

</context-param>

The correct is as follows:

<context-param>

<param-name>url</param-name>

<param-value>jdbc:mysql://localhost:3306/bookstore?useunicode=true&amp;characterencoding=utf-8</ Param-value>

</context-param>

This is probably determined by the encoding rules in the XML file to be transformed.

The following types of characters are escaped in the XML file:

&lt;

<

Less than sign

&gt;

>

Greater than sign

&amp;

&

And

&apos;

‘

Single quotation marks

&quot;

"

Double quotes

The reference to entity "characterencoding" must end with the '; ' Delimiter (Mybatis + Mysql)