Springboot集成Kaptcha

1.添加pom依赖
        <dependency>
			<groupId>com.github.axet</groupId>
			<artifactId>kaptcha</artifactId>
			<version>0.0.9</version>
		</dependency>
        <dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.5</version>
		</dependency>

2.编写配置类
@Configuration
public class KaptchaConfig {

    @Bean
    public DefaultKaptcha producer() {
        Properties properties = new Properties();
        // 图片边框
        properties.setProperty("kaptcha.border", "yes");
        // 边框颜色
        properties.setProperty("kaptcha.border.color", "105,179,90");
        // 字体颜色
        properties.setProperty("kaptcha.textproducer.font.color", "blue");
        // 图片宽
        properties.setProperty("kaptcha.image.width", "110");
        // 图片高
        properties.setProperty("kaptcha.image.height", "40");
        // 字体大小
        properties.setProperty("kaptcha.textproducer.font.size", "30");
        // session key
        properties.setProperty("kaptcha.session.key", "code");
        // 验证码长度
        properties.setProperty("kaptcha.textproducer.char.length", "4");
        // 字体
        properties.setProperty("kaptcha.textproducer.font.names", "宋体,楷体,微软雅黑");
        Config config = new Config(properties);
        DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }
}

3.编写Controller
    @GetMapping("captcha.jpg")
	public void captcha(HttpServletResponse response, String uuid)throws IOException {
		response.setHeader("Cache-Control", "no-store, no-cache");
		response.setContentType("image/jpeg");

		//获取图片验证码
		BufferedImage image = sysCaptchaService.getCaptcha(uuid);

		ServletOutputStream out = response.getOutputStream();
		ImageIO.write(image, "jpg", out);
		IOUtils.closeQuietly(out);
	}

     public BufferedImage getCaptcha(String uuid) {
        if(StringUtils.isBlank(uuid)){
            throw new RRException("uuid不能为空");
        }
        //生成文字验证码
        String code = producer.createText();

        SysCaptchaEntity captchaEntity = new SysCaptchaEntity();
        captchaEntity.setUuid(uuid);
        captchaEntity.setCode(code);
        //5分钟后过期
        captchaEntity.setExpireTime(DateUtils.addDateMinutes(new Date(), 5));
        //将生成的验证码存入数据库
        this.save(captchaEntity);

        return producer.createImage(code);
    }