谷歌开源的kaptcha验证码与SpringBoot2.0集成使用

1.pom中引入依赖

<!--kaptcha验证码-->
        <dependency>
            <groupId>com.github.penggle</groupId>
            <artifactId>kaptcha</artifactId>
            <version>2.3.2</version>
        </dependency>
           

2.启动类中配置验证码的相关配置【也可以添加kaptchaConfig.xml中配置 然后在启动类上在用@ImportResource(locations{"classpath:kaptchaConfig.xml"})引入即可，最后在写这种方式的引入】

import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

import java.util.Properties;

@SpringBootApplication()
@MapperScan("com.XXX.dao")
//@ImportResource(locations={"classpath:kaptchaConfig.xml"})
public class UserApplication {
    public static void main(String[] args) {
        SpringApplication.run(UserApplication.class,args);
    }
    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
    @Bean
    public DefaultKaptcha getDefaultKaptcha(){
        com.google.code.kaptcha.impl.DefaultKaptcha defaultKaptcha = new com.google.code.kaptcha.impl.DefaultKaptcha();
        Properties properties = new Properties();
        properties.setProperty("kaptcha.border", "yes");
        properties.setProperty("kaptcha.border.color", "105,179,90");
        properties.setProperty("kaptcha.textproducer.font.color", "blue");
        properties.setProperty("kaptcha.image.width", "110");
        properties.setProperty("kaptcha.image.height", "40");
        properties.setProperty("kaptcha.textproducer.font.size", "30");
        properties.setProperty("kaptcha.session.key", "code");
        properties.setProperty("kaptcha.textproducer.char.length", "4");
        properties.setProperty("kaptcha.textproducer.font.names", "宋体,楷体,微软雅黑");
        Config config = new Config(properties);
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }
}
           

3.Controller中配置验证码的获取

@Autowired
    private DefaultKaptcha captchaProducer;

 @RequestMapping("/defaultKaptcha")
    public void defaultKaptcha(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        byte[] captchaChallengeAsJpeg = null;
        ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();
        try {
            //生产验证码字符串并保存到session中
            String createText = captchaProducer.createText();
            logger.debug("verifyCode:" + createText);
            httpServletRequest.getSession().setAttribute("code", createText);
            System.out.println(createText + "生成的---------------------");
            //使用生产的验证码字符串返回一个BufferedImage对象并转为byte写入到byte数组中
            BufferedImage challenge = captchaProducer.createImage(createText);
            ImageIO.write(challenge, "jpg", jpegOutputStream);
        } catch (IllegalArgumentException e) {
            httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }

        //定义response输出类型为image/jpeg类型，使用response输出流输出图片的byte数组
        captchaChallengeAsJpeg = jpegOutputStream.toByteArray();

        httpServletResponse.setHeader("Cache-Control", "no-store");
        httpServletResponse.setHeader("Pragma", "no-cache");
        httpServletResponse.setDateHeader("Expires", 0);
        httpServletResponse.setContentType("image/jpeg");
        ServletOutputStream responseOutputStream =
                httpServletResponse.getOutputStream();
        responseOutputStream.write(captchaChallengeAsJpeg);
        responseOutputStream.flush();
        responseOutputStream.close();
    }
           

4.页面中加载验证码即可【注意访问路径 按照自己项目修改】

$(function () {
    // 刷新验证码
    $("#verification").bind("click", function () {
        $(this).hide().attr('src', '/verification?random=' + Math.random()).fadeIn();
    });
});


<img id="verification" src="/verification" style="cursor: pointer;" title="看不清？换一张" />
           

Other：另一种配置方式使用xml配置kaptcha    新建kaptchaConfig.xml   在启动类前加注解

@ImportResource(locations={"classpath:kaptchaConfig.xml"})即可不用配置Bean
           

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="captchaProducer" class="com.google.code.kaptcha.impl.DefaultKaptcha">
        <property name="config">
            <bean class="com.google.code.kaptcha.util.Config">
                <constructor-arg type="java.util.Properties">
                    <props>
                        <!--是否使用边框-->
                        <prop key = "kaptcha.border ">no</prop>
                        <!--边框颜色-->
                        <prop key="kaptcha.border.color">105,179,90</prop>
                        <!--验证码字体颜色-->
                        <prop key="kaptcha.textproducer.font.color">black</prop>
                        <!--验证码图片的宽度-->
                        <prop key="kaptcha.image.width">100</prop>
                        <!--验证码图片的高度-->
                        <prop key="kaptcha.image.height">40</prop>
                        <!--验证码字体的大小-->
                        <prop key="kaptcha.textproducer.font.size">27</prop>
                        <!--验证码保存在session的key-->
                        <prop key="kaptcha.session.key">code</prop>
                        <!--验证码输出的字符长度-->
                        <prop key="kaptcha.textproducer.char.length">4</prop>
                        <!--验证码的字体设置-->
                        <prop key="kaptcha.textproducer.font.names">宋体,楷体,微软雅黑</prop>
                        <!--验证码的取值范围-->
                        <prop key="kaptcha.textproducer.char.string">0123456789</prop>
                        <!--图片的样式-->
                        <prop key="kaptcha.obscurificator.impl">com.google.code.kaptcha.impl.WaterRipple</prop>
                        <!--干扰颜色，合法值： r,g,b 或者 white,black,blue.-->
                       <!-- <prop key="kaptcha.noise.color">white</prop>-->
                        <!--干扰实现类-->
                        <prop key="kaptcha.noise.impl">com.google.code.kaptcha.impl.DefaultNoise</prop>
                        <!--背景颜色渐变，开始颜色-->
                        <prop key="kaptcha.background.clear.from">185,56,213</prop>
                        <!--背景颜色渐变，结束颜色-->
                        <prop key="kaptcha.background.clear.to">white</prop>
                        <!--文字间隔-->
                        <prop key="kaptcha.textproducer.char.space">3</prop>
                    </props>
                </constructor-arg>
            </bean>
        </property>
    </bean>
</beans>