daoClass = Class.forName(daoClassName);//这里是用反射获取一个类名，和它的一个方法
Class methodParameterTypes[] = new Class[1];
methodParameterTypes[0] = Integer.TYPE;
Method targetMethodInfo = daoClass.getMethod("findById", methodParameterTypes);

    public TblPotential findById(java.lang.Integer id) {
        log.debug("getting TblPotential instance with id: " + id);
        try {
            TblPotential instance = (TblPotential) getSession().get(
                    "com.minicrm.hibernate.tables.TblPotential", id);
            return instance;
        } catch (RuntimeException re) {
            log.error("get failed", re);
            throw re;
        }
    }

    public TblPotential findById(int id){
        return findById(id);
    }