SpringBoot-生成验证码

🧑‍🎓 个人主页：Silence Lamb
📖 本章内容：【SpringBoot-生成验证码】

问题描述

🌳 后台生成验证码，用于登陆验证

在这里插入图片描述

前端代码

（1）前台一个用于输入验证码；一个用于展示验证码

（2）验证码生成以及展示，点击刷新功能，可以为绑定click事件

（3）click事件绑定一个获取后端数据的方法，通过后台生成处理好的数据

<div class="login-code">
	<img :src="codeUrl" @click="getCode" class="login-code-img" alt="验证码"/>
div>
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 getCode() {
      getCodeImage().then(response => {
       this.codeUrl = "data:image/gif;base64," + response.data.img;
      });
},
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后端代码

1️⃣添加依赖

 <!-- 验证码 -->
<dependency>
   <groupId>com.github.penggle</groupId>
   <artifactId>kaptcha</artifactId>
   <exclusions>
      <exclusion>
         <artifactId>javax.servlet-api</artifactId>
         <groupId>javax.servlet</groupId>
      </exclusion>
   </exclusions>
</dependency>
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2️⃣验证码文本

/**
 * @author SilenceLamb
 * @apiNote 验证码文本
 */
public class CaptchaText extends DefaultTextCreator {
    private static final String[] NUMBERS = "0,1,2,3,4,5,6,7,8,9,10".split(",");

    @Override
    public String getText() {
        Integer result = 0;
        Random random = new Random();
        int x = random.nextInt(10);
        int y = random.nextInt(10);
        StringBuilder suChinese = new StringBuilder();
        int randomoperands = random.nextInt(3);
        if (randomoperands == 0) {
            result = x * y;
            suChinese.append(NUMBERS[x]);
            suChinese.append("*");
            suChinese.append(NUMBERS[y]);
        } else if (randomoperands == 1) {
            if ((x != 0) && y % x == 0) {
                result = y / x;
                suChinese.append(NUMBERS[y]);
                suChinese.append("/");
                suChinese.append(NUMBERS[x]);
            } else {
                result = x + y;
                suChinese.append(NUMBERS[x]);
                suChinese.append("+");
                suChinese.append(NUMBERS[y]);
            }
        } else {
            if (x >= y) {
                result = x - y;
                suChinese.append(NUMBERS[x]);
                suChinese.append("-");
                suChinese.append(NUMBERS[y]);
            } else {
                result = y - x;
                suChinese.append(NUMBERS[y]);
                suChinese.append("-");
                suChinese.append(NUMBERS[x]);
            }
        }
        suChinese.append("=?@" + result);
        return suChinese.toString();
    }
}
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3️⃣验证码配置

/**
 * @author SilenceLamb
 * @apiNote 验证码配置
 */
@Configuration
public class CaptchaConfig {
    @Bean(name = "captchaProducer")
    public DefaultKaptcha getKaptchaBean() {
        DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
        Properties properties = new Properties();
        // 是否有边框 默认为true 我们可以自己设置yes，no
        properties.setProperty(KAPTCHA_BORDER, "yes");
        // 验证码文本字符颜色 默认为Color.BLACK
        properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_COLOR, "black");
        // 验证码图片宽度 默认为200
        properties.setProperty(KAPTCHA_IMAGE_WIDTH, "160");
        // 验证码图片高度 默认为50
        properties.setProperty(KAPTCHA_IMAGE_HEIGHT, "60");
        // 验证码文本字符大小 默认为40
        properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_SIZE, "38");
        // KAPTCHA_SESSION_KEY
        properties.setProperty(KAPTCHA_SESSION_CONFIG_KEY, "kaptchaCode");
        // 验证码文本字符长度 默认为5
        properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "4");
        // 验证码文本字体样式 默认为new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)
        properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_NAMES, "Arial,Courier");
        // 图片样式 水纹com.google.code.kaptcha.impl.WaterRipple 鱼眼com.google.code.kaptcha.impl.FishEyeGimpy 阴影com.google.code.kaptcha.impl.ShadowGimpy
        properties.setProperty(KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.ShadowGimpy");
        Config config = new Config(properties);
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }

    @Bean(name = "captchaProducerMath")
    public DefaultKaptcha getKaptchaBeanMath() {
        DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
        Properties properties = new Properties();
        // 是否有边框 默认为true 我们可以自己设置yes，no
        properties.setProperty(KAPTCHA_BORDER, "yes");
        // 边框颜色 默认为Color.BLACK
        properties.setProperty(KAPTCHA_BORDER_COLOR, "105,179,90");
        // 验证码文本字符颜色 默认为Color.BLACK
        properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_COLOR, "blue");
        // 验证码图片宽度 默认为200
        properties.setProperty(KAPTCHA_IMAGE_WIDTH, "160");
        // 验证码图片高度 默认为50
        properties.setProperty(KAPTCHA_IMAGE_HEIGHT, "60");
        // 验证码文本字符大小 默认为40
        properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_SIZE, "35");
        // KAPTCHA_SESSION_KEY
        properties.setProperty(KAPTCHA_SESSION_CONFIG_KEY, "kaptchaCodeMath");
        // 验证码文本生成器
        properties.setProperty(KAPTCHA_TEXTPRODUCER_IMPL, "com.silence.framework.config.captcha.CaptchaText");
        // 验证码文本字符间距 默认为2
        properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_SPACE, "3");
        // 验证码文本字符长度 默认为5
        properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "6");
        // 验证码文本字体样式 默认为new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)
        properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_NAMES, "Arial,Courier");
        // 验证码噪点颜色 默认为Color.BLACK
        properties.setProperty(KAPTCHA_NOISE_COLOR, "white");
        // 干扰实现类
        properties.setProperty(KAPTCHA_NOISE_IMPL, "com.google.code.kaptcha.impl.NoNoise");
        // 图片样式 水纹com.google.code.kaptcha.impl.WaterRipple 鱼眼com.google.code.kaptcha.impl.FishEyeGimpy 阴影com.google.code.kaptcha.impl.ShadowGimpy
        properties.setProperty(KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.WaterRipple");
        Config config = new Config(properties);
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }
}
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4️⃣验证码生成工具类

/**
 * @author SilenceLamb
 * @apiNote 验证码生成工具类
 */
public class CaptchaUtils {
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    public Map<String, Object> creatCaptcha(String classify) {
        Map<String, Object> map = new HashMap<>();
        String capStr = null, code = null;
        BufferedImage image = null;
        if ("math".equals(classify)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
            map.put("capStr", capStr);
            map.put("code", code);
            map.put("image", image);
            return map;
        } else if ("char".equals(classify)) {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
            map.put("capStr", capStr);
            map.put("code", code);
            map.put("image", image);
        }

        return map;
    }
}
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5️⃣测试生成验证码

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public AjaxResult getCode(HttpServletResponse response) throws IOException {
        AjaxResult ajax = AjaxResult.success();

        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();
        String verifyKey = RedisCacheConstant.CAPTCHA_CODE_KEY + uuid;
        String capStr = null;
        String code = null;
        BufferedImage image = null;
 
        // 生成验证码
        Map<String, Object> map = captchaUtils.creatCaptcha("math");
        image = (BufferedImage) map.get("image");
        capStr = (String) map.get("capStr");
        code = (String) map.get("code");

        redisUtils.setCacheObject(verifyKey, code, CommonConstant.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            return AjaxResult.error(e.getMessage());
        }
        ajax.put("uuid", uuid);
        ajax.put("capStr", capStr);
        ajax.put("img", Base64Utils.encode(os.toByteArray()));
        return ajax;
    }
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👉🏽访问：http://localhost:8080/captchaImage

在这里插入图片描述
👉🏽图片显示：data:image/gif;base64,/+img

data:image/gif;base64,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在这里插入图片描述

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原文地址：https://blog.csdn.net/m0_46914264/article/details/126623350