目录

[TOC]

kaptcha

依赖

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<!-- 验证码 -->
<dependency>
    <groupId>pro.fessional</groupId>
    <artifactId>kaptcha</artifactId>
    <version>2.3.3</version>
</dependency>

配置类

自定义属性配置类

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import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * 系统自定义配置类
 */
@Data
@Component
@ConfigurationProperties(prefix = "customer")
public class CustomerProperties {

    /**
     * 验证码类型
     */
    private String captchaType;
}
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customer:
  # 验证码类型 math 数字计算 char 字符验证
  captchaType: math

验证码文本生成器

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import com.google.code.kaptcha.text.impl.DefaultTextCreator;

import java.util.Random;

/**
 * 验证码文本生成器
 */
public class KaptchaTextCreator extends DefaultTextCreator {
    private static final String[] CNUMBERS = "0,1,2,3,4,5,6,7,8,9,10".split(",");

    @Override
    public String getText() {
        int 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(CNUMBERS[x]);
            suChinese.append("*");
            suChinese.append(CNUMBERS[y]);
        } else if (randomoperands == 1) {
            if ((x != 0) && y % x == 0) {
                result = y / x;
                suChinese.append(CNUMBERS[y]);
                suChinese.append("/");
                suChinese.append(CNUMBERS[x]);
            } else {
                result = x + y;
                suChinese.append(CNUMBERS[x]);
                suChinese.append("+");
                suChinese.append(CNUMBERS[y]);
            }
        } else {
            if (x >= y) {
                result = x - y;
                suChinese.append(CNUMBERS[x]);
                suChinese.append("-");
                suChinese.append(CNUMBERS[y]);
            } else {
                result = y - x;
                suChinese.append(CNUMBERS[y]);
                suChinese.append("-");
                suChinese.append(CNUMBERS[x]);
            }
        }
        suChinese.append("=?@").append(result);
        return suChinese.toString();
    }
}

验证码配置类

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package com.xiaofei.xiaofei.config;

import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Properties;

import static com.google.code.kaptcha.Constants.*;

/**
 * 验证码配置类
 * ClassName: CaptchaConfig
 * Package: com.xiaofei.xiaofei.config
 *
 * @Author: XiaoFei
 * @Create: 2023/9/26 21:50
 * @Email: 1903078434@qq.com
 * @Version: 1.0
 */
@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【里面配置的值为验证码文本生成器的全路径，例如："com.xiaofei.config.KaptchaTextCreator"】
        properties.setProperty(KAPTCHA_TEXTPRODUCER_IMPL, 配置的值：验证码文本生成器的全路径);
        // 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.ShadowGimpy");
        Config config = new Config(properties);
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }
}

redis工具类

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import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.BoundSetOperations;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;

import java.util.*;
import java.util.concurrent.TimeUnit;

/**
 * spring redis 工具类
 **/
@SuppressWarnings(value = {"unchecked", "rawtypes"})
@Component
public class RedisUtils {
    @Autowired
    public RedisTemplate redisTemplate;

    /**
     * 缓存基本的对象，Integer、String、实体类等
     *
     * @param key   缓存的键值
     * @param value 缓存的值
     */
    public <T> void setCacheObject(final String key, final T value) {
        redisTemplate.opsForValue().set(key, value);
    }

    /**
     * 缓存基本的对象，Integer、String、实体类等
     *
     * @param key      缓存的键值
     * @param value    缓存的值
     * @param timeout  时间
     * @param timeUnit 时间颗粒度
     */
    public <T> void setCacheObject(final String key, final T value, final Integer timeout, final TimeUnit timeUnit) {
        redisTemplate.opsForValue().set(key, value, timeout, timeUnit);
    }

    /**
     * 设置有效时间
     *
     * @param key     Redis键
     * @param timeout 超时时间
     * @return true=设置成功；false=设置失败
     */
    public boolean expire(final String key, final long timeout) {
        return expire(key, timeout, TimeUnit.SECONDS);
    }

    /**
     * 设置有效时间
     *
     * @param key     Redis键
     * @param timeout 超时时间
     * @param unit    时间单位
     * @return true=设置成功；false=设置失败
     */
    public boolean expire(final String key, final long timeout, final TimeUnit unit) {
        return redisTemplate.expire(key, timeout, unit);
    }

    /**
     * 获取有效时间
     *
     * @param key Redis键
     * @return 有效时间
     */
    public long getExpire(final String key) {
        return redisTemplate.getExpire(key);
    }

    /**
     * 判断 key是否存在
     *
     * @param key 键
     * @return true 存在 false不存在
     */
    public Boolean hasKey(String key) {
        return redisTemplate.hasKey(key);
    }

    /**
     * 获得缓存的基本对象。
     *
     * @param key 缓存键值
     * @return 缓存键值对应的数据
     */
    public <T> T getCacheObject(final String key) {
        ValueOperations<String, T> operation = redisTemplate.opsForValue();
        return operation.get(key);
    }

    /**
     * 删除单个对象
     */
    public boolean deleteObject(final String key) {
        return redisTemplate.delete(key);
    }

    /**
     * 删除集合对象
     */
    public boolean deleteObject(final Collection collection) {
        return redisTemplate.delete(collection) > 0;
    }

    /**
     * 缓存List数据
     *
     * @param key      缓存的键值
     * @param dataList 待缓存的List数据
     * @return 缓存的对象
     */
    public <T> long setCacheList(final String key, final List<T> dataList) {
        Long count = redisTemplate.opsForList().rightPushAll(key, dataList);
        return count == null ? 0 : count;
    }

    /**
     * 获得缓存的list对象
     *
     * @param key 缓存的键值
     * @return 缓存键值对应的数据
     */
    public <T> List<T> getCacheList(final String key) {
        return redisTemplate.opsForList().range(key, 0, -1);
    }

    /**
     * 缓存Set
     *
     * @param key     缓存键值
     * @param dataSet 缓存的数据
     * @return 缓存数据的对象
     */
    public <T> BoundSetOperations<String, T> setCacheSet(final String key, final Set<T> dataSet) {
        BoundSetOperations<String, T> setOperation = redisTemplate.boundSetOps(key);
        Iterator<T> it = dataSet.iterator();
        while (it.hasNext()) {
            setOperation.add(it.next());
        }
        return setOperation;
    }

    /**
     * 获得缓存的set
     */
    public <T> Set<T> getCacheSet(final String key) {
        return redisTemplate.opsForSet().members(key);
    }

    /**
     * 缓存Map
     */
    public <T> void setCacheMap(final String key, final Map<String, T> dataMap) {
        if (dataMap != null) {
            redisTemplate.opsForHash().putAll(key, dataMap);
        }
    }

    /**
     * 获得缓存的Map
     */
    public <T> Map<String, T> getCacheMap(final String key) {
        return redisTemplate.opsForHash().entries(key);
    }

    /**
     * 往Hash中存入数据
     *
     * @param key   Redis键
     * @param hKey  Hash键
     * @param value 值
     */
    public <T> void setCacheMapValue(final String key, final String hKey, final T value) {
        redisTemplate.opsForHash().put(key, hKey, value);
    }

    /**
     * 获取Hash中的数据
     *
     * @param key  Redis键
     * @param hKey Hash键
     * @return Hash中的对象
     */
    public <T> T getCacheMapValue(final String key, final String hKey) {
        HashOperations<String, String, T> opsForHash = redisTemplate.opsForHash();
        return opsForHash.get(key, hKey);
    }

    /**
     * 获取多个Hash中的数据
     *
     * @param key   Redis键
     * @param hKeys Hash键集合
     * @return Hash对象集合
     */
    public <T> List<T> getMultiCacheMapValue(final String key, final Collection<Object> hKeys) {
        return redisTemplate.opsForHash().multiGet(key, hKeys);
    }

    /**
     * 删除Hash中的某条数据
     *
     * @param key  Redis键
     * @param hKey Hash键
     * @return 是否成功
     */
    public boolean deleteCacheMapValue(final String key, final String hKey) {
        return redisTemplate.opsForHash().delete(key, hKey) > 0;
    }

    /**
     * 获得缓存的基本对象列表
     *
     * @param pattern 字符串前缀
     * @return 对象列表
     */
    public Collection<String> keys(final String pattern) {
        return redisTemplate.keys(pattern);
    }
}

参数接收实体类

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import lombok.Data;
import javax.validation.constraints.NotBlank;

/**
 * 用户登录信息
 */
@Data
public class LoginInfoVO {

    /**
     * 用户名
     */
    @NotBlank(message = "用户名不能为空")
    private String username;

    /**
     * 用户密码
     */
    @NotBlank(message = "密码不能为空")
    private String password;

    /**
     * 验证码
     */
    @NotBlank(message = "验证码不能为空")
    private String code;

    /**
     * 唯一标识
     */
    @NotBlank(message = "验证码生成时返回的唯一标识不能为空")
    private String uuid;
}

异常类

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public class CaptchaException extends RuntimeException {
    private static final long serialVersionUID = 1L;

    /**
     * 自定义异常的构造方法
     */
    public CaptchaException(String message) {
        super(message);
    }
}

public class UserException extends RuntimeException {
    private static final long serialVersionUID = 1L;

    /**
     * 自定义异常的构造方法
     */
    public UserException(String message) {
        super(message);
    }
}

验证码生成具体实现

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import cn.hutool.core.codec.Base64;
import cn.hutool.core.util.IdUtil;
import com.google.code.kaptcha.Producer;
import com.xiaofei.xiaofei.config.CustomerProperties;
import com.xiaofei.xiaofei.constant.RedisConstant;
import com.xiaofei.xiaofei.handler.CaptchaException;
import com.xiaofei.xiaofei.handler.UserException;
import com.xiaofei.xiaofei.utils.RedisUtils;
import com.xiaofei.xiaofei.utils.ResponseUtils;
import com.xiaofei.xiaofei.vo.LoginInfoVO;
import io.swagger.annotations.Api;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.validation.Valid;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

/**
 * 验证码生成控制器
 */
@Api("验证码校验")
@RestController
public class CaptchaController {

    @Autowired
    private CustomerProperties customerProperties;

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

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

    @Autowired
    private RedisUtils redisUtils;

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public ResponseUtils getCode() {

        ResponseUtils responseUtils = ResponseUtils.success();

        String capStr = null, code = null;

        BufferedImage image = null;

        // 生成验证码
        String captchaType = customerProperties.getCaptchaType();
        if ("math".equals(captchaType)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        } else if ("char".equals(captchaType)) {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }

        // 保存验证码信息
        String uuid = IdUtil.simpleUUID();
        String verifyKey = RedisConstant.CAPTCHA_CODE_KEY + uuid;

        redisUtils.setCacheObject(verifyKey, code, RedisConstant.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);

        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            ResponseUtils.error(e.getMessage());
        }

        responseUtils.put("uuid", uuid);
        responseUtils.put("img", Base64.encode(os.toByteArray()));
        return responseUtils;
    }

    /**
     * 验证码验证
     */
    @PostMapping("/verify")
    public ResponseUtils captchaVerify(@Valid @RequestBody LoginInfoVO loginInfoVO) {

        // 验证码校验
        String captchaCacheKey = RedisConstant.CAPTCHA_CODE_KEY + loginInfoVO.getUuid();
        // 获取缓存中的验证码值
        String captcha = redisUtils.getCacheObject(captchaCacheKey);
        //redisUtils.deleteObject(verifyKey);
        // 检查缓存是否失效
        if (StringUtils.isEmpty(captcha)) {
            throw new CaptchaException("验证码已失效");
        }
        // 检查输入的验证码和缓存的验证码是否一致
        if (!captcha.equalsIgnoreCase(loginInfoVO.getCode())) {
            throw new CaptchaException("验证码错误");
        }

        // 用户名密码校验
        if (!"admin".equals(loginInfoVO.getUsername()) || !"admin".equals(loginInfoVO.getPassword())) {
            throw new UserException("用户名或密码错误");
        }

        // 生成token ，这里因为测试，就简单生成一个字符串给前端返回，演示流程

        String token = IdUtil.fastUUID();

        return ResponseUtils.success().put("token", token);
    }
}

测试

image-20230926233950065

image-20230926234018599