代码如下
Controller:

	/**
     * 登陆接口
     *
     * @param loginDto 登陆参数，包含手机号和微信唯一ID
     * @return
     */
    @ApiOperation(value = "登陆", httpMethod = "POST", produces = MediaType.APPLICATION_JSON_VALUE)
    @RateLimiter(value = 1, qps = 1)
    @RequestMapping(value = "/login")
    public CommonResult login(@Validated(QueryGroup.class) @RequestBody LoginDto loginDto) {
        String token = userService.login(loginDto.getMobile(),loginDto.getOpenId());
        return CommonResult.success(token,"登陆成功");
    }

LoginDto:

	/**
     * 手机号
     */
    @ApiModelProperty(value = "手机号", name = "mobile", dataType = "java.lang.String", required = true)
    @Pattern(regexp = "^1(3[0-9]|4[01456879]|5[0-35-9]|6[2567]|7[0-8]|8[0-9]|9[0-35-9])\\d{8}$", message = "手机号格式错误", groups = {QueryGroup.class,CreateGroup.class})
    @Size(min = 1, max = 20, message = "手机号长度为1-20位", groups = {QueryGroup.class,CreateGroup.class})
    private String mobile;

@Pattern和@Size不生效

解决方法

加入以下依赖

<dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-validation</artifactId>
</dependency>