登录中的图片验证码功能实现

旧城等待， 2022-12-27 07:56 202阅读 0赞

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);
            }
        }
       
    }