java+osgi+mysql数据库连接异常

--------------------编程问答-------------------- 补充数据库连接和释放的代码：
/**
*连接数据库
* @return 创建的连接
*/
public Connection getConn(){
String driver = "com.mysql.jdbc.Driver";
//String url = "jdbc:mysql://localhost:3306/test?user=root&password=root&useUnicode=true&characterEncoding=UTF-8";
String url = "jdbc:mysql://localhost:3306/test";
Connection conn = null;
try{
if(conn == null){
Class.forName(driver);
conn = DriverManager.getConnection(url,"root","root");
//conn = DriverManager.getConnection(url);
}
}catch(Exception e){
System.err.println("装载 JDBC/ODBC 驱动程序失败。");
e.printStackTrace();
System.exit(1); // terminate program
}
/*try{
        Class.forName("oracle.jdbc.driver.OracleDriver");
        conn=DriverManager.getConnection( "jdbc:oracle:thin:@192.168.1.199:1521:ices","wangwl","wangwenli");
      }
      catch(Exception ex){
        ex.printStackTrace();
      }*/
return conn;
}
/**
*释放数据库
* @param conn
*/
public void releaseConn(Connection conn){
try{
if(conn != null){
conn.close();
System.out.println("释放数据库连接完毕");
}
}catch(Exception e){
e.printStackTrace();
}
}
--------------------编程问答--------------------

我也在弄啊这个驱动包导入就可以了吗？

补充：Java ,  Web 开发