JAVA--代码段（登录判断）

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/caoshiminYQS/article/details/86552297

@Service
public class LoginServiceImpl implements LoginService {

	@Autowired
	private TbUserMapper userMapper;
	@Autowired
	private JedisClient jedisClient;
	@Value("${REDIS_SESSION_KEY}")
	private String REDIS_SESSION_KEY;
	@Value("${REDIS_SESSION_EXPIRE}")
	private Integer REDIS_SESSION_EXPIRE;
	
	private static String TT_TOKEN="TT_TOKEN";
	
	@Override
	public TaotaoResult login(String username, String password, HttpServletRequest request, HttpServletResponse response) {
		
		//有效性验证
		if (StringUtils.isBlank(username) || StringUtils.isBlank(password)) {
			return TaotaoResult.build(400, "有户名和密码不能为空");
		}
		TbUserExample example = new TbUserExample();
		Criteria criteria = example.createCriteria();
		criteria.andUsernameEqualTo(username);
		List<TbUser> list = userMapper.selectByExample(example);
		if (list == null || list.isEmpty()) {
			return TaotaoResult.build(400, "用户名或密码错误");
		}
		//判断密码是否正确
		TbUser user = list.get(0);
		if (!DigestUtils.md5DigestAsHex(password.getBytes()).equals(user.getPassword())) {
			return TaotaoResult.build(400, "用户名或密码错误");
		}
		//生成token
		UUID uuid = UUID.randomUUID();
		String token = uuid.toString();
		//把用户信息写入redis
		//把用户的密码清空，为了安全。
		user.setPassword(null);
		jedisClient.set(REDIS_SESSION_KEY + ":" + token, JsonUtils.objectToJson(user));
		jedisClient.expire(REDIS_SESSION_KEY + ":" + token, REDIS_SESSION_EXPIRE);
		//把token写入cookie
		CookieUtils.setCookie(request, response, TT_TOKEN, token);
		//返回token
		return TaotaoResult.ok(token);
	}

}