springbooot使用google验证码的功能实现

 <!-- google 验证码 -->
        <!-- https://mvnrepository.com/artifact/com.github.penggle/kaptcha -->
        <dependency>
            <groupId>com.github.penggle</groupId>
            <artifactId>kaptcha</artifactId>
            <version>2.3.2</version>
        </dependency>

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;
@Configuration
public class KaptchaConfig {
       @Bean
    DefaultKaptcha producer() { //验证码的配置类
        Properties properties = new Properties();                       
        properties.put("kaptcha.border", "no");                       //边框
        properties.put("kaptcha.textproducer.font.color", "black");   //字体颜色
        properties.put("kaptcha.textproducer.char.space", "5");       //字体间隔
        properties.put("kaptcha.image.height", "40");                 //图片高度
        properties.put("kaptcha.image.width", "100");                 //图片宽度
        properties.put("kaptcha.textproducer.font.size", "30");       //字体大小
        Config config = new Config(properties);                       
        DefaultKaptcha defaultKaptcha = new DefaultKaptcha();         
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }
}

//获取登录验证码
    @GetMapping("/captcha")
    public Result Captcha() throws IOException {
        String key = UUID.randomUUID().toString();
        String code = producer.createText();
        BufferedImage image = producer.createImage(code);
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ImageIO.write(image, "jpg", outputStream);
        BASE64Encoder encoder = new BASE64Encoder();
        String str = "data:image/jpeg;base64,";
        String base64Img = str + encoder.encode(outputStream.toByteArray());
        redisUtils.hset(Constants.CAPTCHA_KEY, key, code, 120);
        return Result.succ(
                MapUtil.builder()
                        .put("userKey", key)
                        .put("captchaImg", base64Img)
                        .build()
        );
    }

/**
     * 向一张hash表中放入数据,如果不存在将创建
     *
     * @param key   键
     * @param item  项
     * @param value 值
     * @param time  时间(秒) 注意:如果已存在的hash表有时间,这里将会替换原有的时间
     * @return true 成功 false失败
     */
    public boolean hset(String key, String item, Object value, long time) {
        try {
            redisTemplate.opsForHash().put(key, item, value);
            if (time > 0) {
                expire(key, time);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

@Data
public class Result_ implements Serializable {
    private int code;
    private String msg;
    private Object data;
    public static Result_ succ(Object data) {
        return succ(200, "操作成功", data);
    }
    public static Result_ fail(String msg) {
        return fail(400, msg, null);
    }
    public static Result_ succ (int code, String msg, Object data) {
        Result_ result = new Result_();
        result.setCode(code);
        result.setMsg(msg);
        result.setData(data);
        return result;
    }
    public static Result_ fail (int code, String msg, Object data) {
        Result_ result = new Result_();
        result.setCode(code);
        result.setMsg(msg);
        result.setData(data);
        return result;
    }
}

<el-form-item label="验证码" prop="code" style="width: 380px">
                          <el-input placeholder="请输入验证码"v-model="loginForm.code"style="width: 172px; float: left" ></el-input>
                          <el-image class="captchaImg" :src="captchaImg" @click="getCaptcha()"></el-image>
                      </el-form-item>

// 获取验证码
        getCaptcha() {
            this.$axios.get('/user/captcha1').then(res => {
                this.loginForm.token = res.data.data.token
                this.captchaImg = res.data.data.captchaImg
                this.loginForm.code = ''
            })
        }