Java DefaultKaptcha 生成图形验证码

最新推荐文章于 2024-08-19 17:37:26 发布

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最新推荐文章于 2024-08-19 17:37:26 发布

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分类专栏： JAVA 文章标签： java spring

本文链接：https://blog.youkuaiyun.com/weixin_43444652/article/details/129167131

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1.导入依赖


        <dependency>
            <groupId>com.github.penggle</groupId>
            <artifactId>kaptcha</artifactId>
            <version>2.3.2</version>
        </dependency>

2.配置config

@Configuration
public class KaptchaConfiguration {

    @Bean
    public Producer kaptchaProducer() {
        Properties props = new Properties();
        props.setProperty("kaptcha.border", "no");
        props.setProperty("kaptcha.border.color", "105,179,90");
        props.setProperty("kaptcha.textproducer.font.color", "blue");
        props.setProperty("kaptcha.image.width", "110");
        props.setProperty("kaptcha.image.height", "40");
        props.setProperty("kaptcha.textproducer.font.size", "30");
        props.setProperty("kaptcha.textproducer.char.space", "5");
        props.setProperty("kaptcha.noise.color", "gray");
        props.setProperty("kaptcha.session.key", "code");
        props.setProperty("kaptcha.textproducer.char.length", "4");
        Config config = new Config(props);
        return config.getProducerImpl();
    }
    
}

3.生成图形验证码及存入redis

    @Override
    public String getImageCode(String mobile) {
        Assert.hasText(mobile, "手机号不能为空");
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        try {
            String code = kaptchaProducer.createText();
            BufferedImage imageCode = kaptchaProducer.createImage(code);
            ImageIO.write(imageCode, "jpeg", output);
            redisService.setString(imageCodeKey(mobile), code);
            return new StringBuilder("data:image/jpeg;base64,")
                    .append(Base64.encodeBase64String(output.toByteArray()))
                    .toString();
        } catch (Exception e) {
            throw new BusinessException("图形验证码获取失败：" + e.getMessage());
        }
    }