list列表数据为空
public List<Users> UsersLogin(String userName,String passWord){
BaseDao bd = new BaseDao();
Users u = new Users();
u.setUserName(userName);
u.setUserPassword(passWord);
List<Users> list = new ArrayList<Users>();
SqlSession sqlSession = null;
try {
sqlSession = bd.getSqlSession();
list = sqlSession.selectList("userLogin",u);
} catch (IOException e) {