<dependency>
  <groupId>com.aliyun</groupId>
  <artifactId>aliyun-java-sdk-core</artifactId>
  <version>4.5.16</version>
</dependency>
<dependency>
  <groupId>com.aliyun</groupId>
  <artifactId>aliyun-java-sdk-dysmsapi</artifactId>
  <version>2.1.0</version>
</dependency>

/**
 * 用户信息
 */
@Data
public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    private Long id;
    //姓名
    private String name;
    //手机号
    private String phone;
    //性别 0 女 1 男
    private String sex;
    //身份证号
    private String idNumber;
    //头像
    private String avatar;
    //状态 0:禁用，1:正常
    private Integer status;
}

@Mapper
public interface UserMapper extends BaseMapper<User> {
}

public interface UserService extends IService<User> {
}

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
}

@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
    @Autowired
    private UserService userService;
}

/**
 * 短信发送工具类
 */
public class SMSUtils {
    /**
    * 发送短信
    * @param signName 签名
    * @param templateCode 模板
    * @param phoneNumbers 手机号
    * @param param 参数
    */
    public static void sendMessage(String signName, String templateCode,String phoneNumbers,String param){
        DefaultProfile profile = DefaultProfile.getProfile("cn-hangzhou", "", "");
        IAcsClient client = new DefaultAcsClient(profile);
        SendSmsRequest request = new SendSmsRequest();
        request.setSysRegionId("cn-hangzhou");
        request.setPhoneNumbers(phoneNumbers);
        request.setSignName(signName);
        request.setTemplateCode(templateCode);
        request.setTemplateParam("{\"code\":\""+param+"\"}");
        try {
            SendSmsResponse response = client.getAcsResponse(request);
            System.out.println("短信发送成功");
        }catch (ClientException e) {
            e.printStackTrace();
        }
    }
}

/**
 * 随机生成验证码工具类
 */
public class ValidateCodeUtils {
    /**
     * 随机生成验证码
     * @param length 长度为4位或者6位
     * @return
     */
    public static Integer generateValidateCode(int length){
        Integer code =null;
        if(length == 4){
            code = new Random().nextInt(9999);//生成随机数，最大为9999
            if(code < 1000){
                code = code + 1000;//保证随机数为4位数字
            }
        }else if(length == 6){
            code = new Random().nextInt(999999);//生成随机数，最大为999999
            if(code < 100000){
                code = code + 100000;//保证随机数为6位数字
            }
        }else{
            throw new RuntimeException("只能生成4位或6位数字验证码");
        }
        return code;
    }
    /**
     * 随机生成指定长度字符串验证码
     * @param length 长度
     * @return
     */
    public static String generateValidateCode4String(int length){
        Random rdm = new Random();
        String hash1 = Integer.toHexString(rdm.nextInt());
        String capstr = hash1.substring(0, length);
        return capstr;
    }
}

@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
    @Autowired
    private UserService userService;
    //发送手机短信验证码
    @PostMapping("/sendMsg")
    public R<String> sendMsg(@RequestBody User user, HttpSession session){
        //获取手机号
        String phone = user.getPhone();
        if(StringUtils.isNotEmpty(phone)){
            //生成随机的四位验证码
            String code = ValidateCodeUtils.generateValidateCode(4).toString();
            log.info("code={}",code);
            //调用阿里云提供的短信服务API完成发送短信
            //SMSUtils.sendMessage("瑞吉外卖","",phone,code);
            //需要将生成的验证码保存到session
            session.setAttribute(phone,code);
            return R.success("手机验证码发送成功");
        }
        return R.error("短信发送失败");
    }
    @PostMapping("/login")
    public R<User> login(@RequestBody Map map,HttpSession session){
        //获取手机号
        String phone = map.get("phone").toString();
        //获取验证码
        String code = map.get("code").toString();
        //从Session中获取保存的验证码
        Object codeInSession = session.getAttribute(phone);
        //进行验证码的比对
        if(codeInSession!=null && codeInSession.equals(code)){
            //如果能够比对成功，说明登录成功
            LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(User::getPhone,phone);
            User user = userService.getOne(queryWrapper);
            if(user==null){
                //判断当前手机号对应的用户是否是新用户，如果是新用户完成自动注册
                user = new User();
                user.setPhone(phone);
                user.setStatus(1);
                userService.save(user);
            }
            session.setAttribute("user",user.getId());
            return R.success(user);
        }
        return R.error("短信发送失败");
    }
}