<Resource id="MySQLDB" type="DataSource">
    JdbcDriver com.mysql.jdbc.Driver
    JdbcUrl    jdbc:mysql://localhost/test
    UserName   root
    Password   mysql
</Resource>

@Resource(name="MySQLDB")
private DataSource ds;
・・・
System.out.println("DB:" + ds.getConnection().getMetaData().getDatabaseProductName());