SpringBoot增加验证码

一、加入验证码依赖包


com.github.whvcse
easy-captcha
1.6.2

二、实现验证码控制层

@GetMapping("/common/kaptcha")
public void defaultKaptcha(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
    httpServletResponse.setHeader("Cache-Control", "no-store");
    httpServletResponse.setHeader("Pragma", "no-cache");
    httpServletResponse.setDateHeader("Expires", 0);
    httpServletResponse.setContentType("image/png");

    // 三个参数分别为宽、高、位数
    SpecCaptcha captcha = new SpecCaptcha(150, 40, 4);

    // 设置类型 数字和字母混合
    captcha.setCharType(Captcha.TYPE_DEFAULT);

    //设置字体
    captcha.setCharType(Captcha.FONT_9);

    // 验证码存入session
    httpServletRequest.getSession().setAttribute("verifyCode", captcha.text().toLowerCase());

    // 输出图片流
    captcha.out(httpServletResponse.getOutputStream());
}

三、前端调用验证码接口 显示 图片

四、效果如下