context-datasource.xml mysql / mariadb 설정

mysql

   		<property name="driverClassName" value="com.mysql.cj.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://~~~~?allowMultiQueries=true" />

mariadb

   		<property name="driverClassName" value="org.mariadb.jdbc.Driver"/>
        <property name="url" value="jdbc:mariadb://~~~~?allowMultiQueries=true" />

그리고 pom.xml에

		<!-- https://mvnrepository.com/artifact/com.mysql/mysql-connector-j -->
		<dependency>
		    <groupId>com.mysql</groupId>
		    <artifactId>mysql-connector-j</artifactId>
		    <version>8.0.33</version>
		</dependency>

이런 내용을 추가하거나 데이터베이스 jar를 webapp web-inf lib에 추가하면 됨