登录中的图片验证码功能实现-蒲公英云

登录中的图片验证码功能实现

添加kaptcha依赖

<dependency>
    <groupId>com.github.axet</groupId>
    <artifactId>kaptcha</artifactId>
    <version>0.0.9</version>
</dependency>

自定义配置kaptcha的Producer

@Configuration
public class KaptchaConfig {
    private static final String KAPTCHA_BORDER = "kaptcha.border";
    private static final String KAPTCHA_TEXTPRODUCER_FONT_COLOR = "kaptcha.textproducer.font.color";
    private static final String KAPTCHA_TEXTPRODUCER_CHAR_SPACE = "kaptcha.textproducer.char.space";
    private static final String KAPTCHA_IMAGE_WIDTH = "kaptcha.image.width";
    private static final String KAPTCHA_IMAGE_HEIGHT = "kaptcha.image.height";
    private static final String KAPTCHA_TEXTPRODUCER_CHAR_LENGTH = "kaptcha.textproducer.char.length";
    private static final Object KAPTCHA_IMAGE_FONT_SIZE = "kaptcha.textproducer.font.size";
    @Bean
    public DefaultKaptcha producer() {
        Properties properties = new Properties();
        properties.put(KAPTCHA_BORDER, "no");
        properties.put(KAPTCHA_TEXTPRODUCER_FONT_COLOR, "blue");
        properties.put(KAPTCHA_TEXTPRODUCER_CHAR_SPACE, 5);
        properties.put(KAPTCHA_IMAGE_WIDTH, "100");
        properties.put(KAPTCHA_IMAGE_HEIGHT, "35");
        properties.put(KAPTCHA_IMAGE_FONT_SIZE, "30");
        properties.put(KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "4");
        Config config = new Config(properties);
        DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }
}

使用Producer生成图片验证码

@Controller
public class ValidateCodeController {
    @Autowired
    private Producer producer;
    @Autowired
    private ValidateCodeService validateCodeService;
    /**
     * 创建验证码
     *
     * @throws Exception
     */
    @GetMapping("/validata/code/{deviceId}")
    public void createCode(@PathVariable String deviceId, HttpServletResponse response) throws Exception {
        Assert.notNull(deviceId, "机器码不能为空");
        response.setHeader("Cache-Control", "no-store, no-cache");
        response.setContentType("image/jpeg");
        //生成文字验证码
        String text = producer.createText();
        //生成图片验证码
        BufferedImage image = producer.createImage(text);
        //验证码保存
        validateCodeService.saveImageCode(deviceId, text);
        try (
                ServletOutputStream out = response.getOutputStream()
                ) {
            ImageIO.write(image, "JPEG", out);
        }
    }
}