public class xdaoImpl implements xdao
{
public static xdao myself ;
public static xdao getXdao()
{ if (null!=xdaoImpl )
return myself ;
else return new xdaoImpl();
}
public Object function1(param1,param2)
{
do something;
return something;
}
public Object function2(param1,param2,param3)
{
do something;
return something;
}
}
另外,也建议学习一下工厂模式. 当然这些你的问题没有关系.