Method countusername

src/main/java/cn/hellohao/dao/UserMapper.java:21–21

(@Param("username") String username)

    List<User> getuserlist(String username);
    Integer deleuser(@Param("id") Integer id);
    Integer countusername(@Param("username") String username);
    Integer countmail(@Param("email") String email);
    Integer uiduser(@Param("uid") String uid);
    User getUsersMail(@Param("uid") String uid);