引入kaptcha图形验证码及其配置

客官°小女子只卖身不卖艺 2023-10-10 15:14 23阅读 0赞

#### 1、引入依赖 ####

<dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>kaptcha-spring-boot-starter</artifactId>
        <version>${captcha.version}（1.1.0）</version>
    </dependency>

#### 2、CaptchaConfig.java 配置类 ####

import com.google.code.kaptcha.Constants;
    import com.google.code.kaptcha.impl.DefaultKaptcha;
    import com.google.code.kaptcha.util.Config;
    import org.springframework.beans.factory.annotation.Qualifier;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    import java.util.Properties;
    
    @Configuration
    public class CaptchaConfig {
    
        /**
         * 验证码配置
         * Kaptcha配置类名
         *
         * @return DefaultKaptcha
         */
        @Bean
        @Qualifier("captchaProducer")
        public DefaultKaptcha kaptcha() {
    
            DefaultKaptcha kaptcha = new DefaultKaptcha();
            Properties properties = new Properties();
    
            // properties.setProperty(Constants.KAPTCHA_BORDER, "yes");
            // properties.setProperty(Constants.KAPTCHA_BORDER_COLOR, "220,220,220");
            // properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_COLOR, "38,29,12");
            // properties.setProperty(Constants.KAPTCHA_IMAGE_WIDTH, "147");
            // properties.setProperty(Constants.KAPTCHA_IMAGE_HEIGHT, "34");
            // properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_SIZE, "25");
            // properties.setProperty(Constants.KAPTCHA_SESSION_KEY, "code");
    
            // 验证码个数
            properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "4");
            // properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_NAMES, "Courier");
            // 字体间隔
            properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_SPACE, "8");
            // 干扰线颜色
            // properties.setProperty(Constants.KAPTCHA_NOISE_COLOR, "white");
            // 干扰实现类
            properties.setProperty(Constants.KAPTCHA_NOISE_IMPL, "com.google.code.kaptcha.impl.NoNoise");
            // 图片样式
            properties.setProperty(Constants.KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.WaterRipple");
            // 文字来源
            properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_STRING, "0123456789");
    
            Config config = new Config(properties);
            kaptcha.setConfig(config);
    
            return kaptcha;
        }
    
    }

#### 3、调用处代码 ####

// 自动装配Kaptcha配置文件
        @Autowired
        private Producer captchaProducer;
    
        /**
         * 验证码接口，生成验证码
         *
         * @param request  javax.servlet.http.HttpServletRequest
         * @param response javax.servlet.http.HttpServletResponse
         */
        @GetMapping("captcha")
        public void getCaptcha(HttpServletRequest request, HttpServletResponse response) {
            String captchaText = captchaProducer.createText();
            log.info("验证码内容:{}", captchaText);
            // TODO: 存储redis，配置过期时间
            //产生图片 输出流
            BufferedImage image = captchaProducer.createImage(captchaText);
            try {
                ServletOutputStream outputStream = response.getOutputStream();
                ImageIO.write(image, "jpg", outputStream);
                outputStream.flush();
                outputStream.close();
            } catch (IOException e) {
                log.error("获取流出错:{}", e.getMessage());
            }
        }