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