<Realm
    className="org.apache.catalina.realm.JDBCRealm"
    connectionURL="jdbc:mysql://localhost/forum?user=root&amp;password=mysqltest&amp;characterEncoding=utf8"
    digest="MD5"
    driverName="com.mysql.cj.jdbc.Driver"
    roleNameCol="role"
    userCredCol="password"
    userNameCol="login"
    userRoleTable="role"
    userTable="user">
    <CredentialHandler
    className="org.apache.catalina.realm.MessageDigestCredentialHandler"
    algorithm="md5"
    />
</Realm>