springboot 集成 kaptcha 验证码

springboot 集成 kaptcha 验证码

1. 添加 maven 依赖

<!--kaptcha依赖包-->
 <dependency>
     <groupId>com.baomidou</groupId>
     <artifactId>kaptcha-spring-boot-starter</artifactId>
     <version>1.1.0</version>
 </dependency>

2. 增加 Captcha 配置信息

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 {


    /**
     * 验证码配置类
     * @return
     */
    @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. 使用示例

    @Autowired
    private Producer captchaProducer;

 /**
     * 生成验证码
     * @param request
     * @param response
     */
    @GetMapping("/captcha")
    public void getCaptcha(HttpServletRequest request, HttpServletResponse response){
        String captchaText = captchaProducer.createText();
        log.info("验证码内容:{}",captchaText);

        BufferedImage bufferedImage = captchaProducer.createImage(captchaText);

        try (ServletOutputStream outputStream = response.getOutputStream()){

            ImageIO.write(bufferedImage,"jpg",outputStream);
            outputStream.flush();
        } catch (IOException e) {
            log.error("获取流出错:{}",e.getMessage());
        }

    }