相关代码：

public class UserService {
    private UserDao userDao = new UserDao();
    private RbacDao rbacDao = new RbacDao();
    /**
     * 验证登录信息的Service
     * @param username
     * @param password
     * @return User
     */
    public User checkLogin(String username, String password){
        User user = userDao.selectByUsername(username);
        if (user==null){
            //用户名不存在异常
            throw new BussinessException("L001", "用户名不存在");
        }
        String md5Password = MD5Utils.md5Digest(password, user.getSalt());
        if (!md5Password.equals(user.getPassword())){
            throw new BussinessException("L002", "密码错误");
        }
        return user;
    }

    public List<Node> selectNodeById(Long userId){
        return rbacDao.SelectNodeById(userId);
    }
}



public class MD5Utils {
    /**
     * MD5摘要
     * @param source 元数据
     * @return MD5摘要
     */
    public static String md5Digest(String source){
        return DigestUtils.md5Hex(source);
    }

    /**
     * MD5加盐摘要
     * @param source
     * @param salt
     * @return
     */
    public static String md5Digest(String source,Integer salt){
        char[] ca = source.toCharArray();//原始字符串变为字符数组
        //加盐
        for (int i = 0; i <ca.length ; i++) {
            ca[i] = (char) (ca[i] + salt);
        }
        //数组变为字符串
        String target = new String(ca);
        //MD5摘要
        String md5String = DigestUtils.md5Hex(target);
        return md5String;
    }


}

相关截图：
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