dao 层实现 的方法

@Override
public boolean checkPhone(String phone) {
String sql = "select username from user where phone=?";
List<Map<String, Object>> queryForList = DbUtil.queryForList(sql, phone);
if(queryForList.isEmpty(http://www.amjmh.com/v/BIBRGZ_558768/)){
return true;
}
return false;
}
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