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数据库比较简单，请自行创建

package nkj.dao;


import nkj.user.User;

//实现注册功能
/**
 * 用户dao
 *
 */

public interface UserDao {

    /**
     * 添加用户信息
     * @param user
     * @throws Exception
     */
    public void addUser（User user） throws Exception;
    /**
     * 根据用户姓名和密码查找用户
     * @param user
     * @return
     * @throws Exception
     */
    public User findUserByNameAndPassword（User user） throws Exception;
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2020-06-03 20:40  login\
     目录           0  2020-06-05 02:25  login\.idea\
     目录           0  2020-06-03 19:30  login\.idea\artifacts\
     文件         495  2020-06-03 19:30  login\.idea\artifacts\login_war_exploded.xml
     文件         138  2020-06-03 19:30  login\.idea\encodings.xml
     文件         282  2020-06-03 19:30  login\.idea\misc.xml
     文件         257  2020-06-03 19:30  login\.idea\modules.xml
     文件        8915  2020-06-03 19:34  login\.idea\uiDesigner.xml
     文件       24903  2020-06-05 02:25  login\.idea\workspace.xml
     文件        1907  2020-06-03 20:40  login\login.iml
     目录           0  2020-06-03 20:00  login\out\
     目录           0  2020-06-03 20:00  login\out\artifacts\
     目录           0  2020-06-05 01:56  login\out\artifacts\login_war_exploded\
     文件         800  2020-06-05 01:56  login\out\artifacts\login_war_exploded\index.jsp
     文件         491  2020-06-05 01:56  login\out\artifacts\login_war_exploded\login_succees.jsp
     文件         922  2020-06-03 20:00  login\out\artifacts\login_war_exploded\regist.jsp
     目录           0  2020-06-03 20:00  login\out\artifacts\login_war_exploded\WEB-INF\
     目录           0  2020-06-03 20:00  login\out\artifacts\login_war_exploded\WEB-INF\classes\
     文件         232  2020-06-03 20:00  login\out\artifacts\login_war_exploded\WEB-INF\classes\druid.properties
     目录           0  2020-06-03 20:00  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\
     目录           0  2020-06-05 01:56  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\dao\
     文件         271  2020-06-05 01:56  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\dao\UserDao.class
     目录           0  2020-06-03 20:00  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\impl\
     文件        2083  2020-06-03 20:00  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\impl\UserDaoImpl.class
     文件         789  2020-06-03 20:00  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\impl\UserServiceImpl.class
     目录           0  2020-06-03 20:43  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\serverlet\
     文件        2270  2020-06-03 20:20  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\serverlet\LoginServerlet.class
     文件        1348  2020-06-03 20:43  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\serverlet\LogoutServerlet.class
     文件        2151  2020-06-03 20:41  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\serverlet\RegistServerlet.class
     目录           0  2020-06-03 20:00  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\service\
     文件         283  2020-06-03 20:00  login\out\artifacts\login_war_exploded\WEB-INF\classes\nkj\service\UserService.class
............此处省略72个文件信息