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<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.8.23</version>
</dependency>

/**
 * 登录
 *
 * @param username 用户名称
 * @param password 用户密码
 * @return
 */
@ResponseBody
@PostMapping("/login")
public AjaxResult login(String username, String password) {
    if (StrUtil.isEmpty(username)) {
        return AjaxResult.error("登录名称不能空");
    }
    if (StrUtil.isEmpty(password)) {
        return AjaxResult.error("登录密码不能空");
    }
    UsernamePasswordToken token = new UsernamePasswordToken(username, password, false);
    Subject subject = SecurityUtils.getSubject();
    try {
        subject.login(token);
        return AjaxResult.success("登录成功");
    } catch (AuthenticationException e) {
         return AjaxResult.error("登录名称或密码错误");
    }
}

//判断是否是手机号
boolean isPhone = ReUtil.isMatch(RegexPool.MOBILE, username);
//判断是否是邮箱
boolean isEmail = ReUtil.isMatch(RegexPool.EMAIL, username);
//如果用户为空且用户名是手机号，则通过手机号查询用户信息
if (user == null && isPhone) {
    user = userService.selectUserByPhoneNumber(username);
}
//如果用户为空且用户名是邮箱，则通过邮箱查询用户信息
if (user == null && isEmail) {
    user = userService.selectUserByEmail(username);
}