Spring Boot集成kaptcha验证码的使用

本文主要在Spring Boot中使用kaptcha验证码，使用的是默认的样式

Maven依赖

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

验证码组件

import com.baomidou.kaptcha.Kaptcha;
import com.baomidou.kaptcha.exception.KaptchaRenderException;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import sun.misc.BASE64Encoder;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
 * 验证码组件
 *
 * @author cc
 */
@Component
public class GoogleOverrideKaptcha implements Kaptcha {

    private DefaultKaptcha kaptcha;

    public GoogleOverrideKaptcha(DefaultKaptcha kaptcha) {
        this.kaptcha = kaptcha;
    }

    public String render(HttpServletRequest request) {
    //生成验证码文本
        String sessionCode = kaptcha.createText();
        ByteArrayOutputStream outputStream = null;
        try  {
        //放入缓存中
            HttpSession session = request.getSession();
            session.setAttribute("verificationCode",sessionCode);
            System.out.println(sessionCode);
            outputStream = new ByteArrayOutputStream();
            ImageIO.write(kaptcha.createImage(sessionCode), "jpg", outputStream);
            BASE64Encoder encoder = new BASE64Encoder();
            String base64 = encoder.encode(outputStream.toByteArray());
            String captchaBase64 = "data:image/jpeg;base64," + base64.replaceAll("\r\n", "").replaceAll("\n","").replace("\r","");
            return captchaBase64;
        } catch (IOException e) {
            throw new KaptchaRenderException(e);
        }finally {
            try {
                if (outputStream != null) {
                    outputStream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public String render() {
        return null;
    }

    @Override
    public boolean validate(String code) {
        return validate(code, 900);
    }

    @Override
    public boolean validate(String s, long l) {
        return false;
    }

}

自定义样式

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

import com.google.code.kaptcha.util.Config;
import java.util.Properties;

/**
 * @author cc
 * 验证码bean
 */
@Configuration
public class CaptchaConfig {
    @Bean
    public DefaultKaptcha getKaptchaBean() {
        DefaultKaptcha defaultKaptcha = new 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.obscurificator.impl", "com.google.code.kaptcha.impl.WaterRipple");
        properties.setProperty("kaptcha.producer.impl", "com.google.code.kaptcha.impl.DefaultKaptcha");
        properties.setProperty("kaptcha.textproducer.char.space", "2");
        properties.setProperty("kaptcha.image.width", "100");
        properties.setProperty("kaptcha.image.height", "34");
        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");
        properties.setProperty("kaptcha.textproducer.font.size", "24");
        Config config = new Config(properties);
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }
}

样式参数

kaptcha.border	图片边框，合法值：yes , no	yes
kaptcha.border.color	边框颜色，合法值： r,g,b (and optional alpha) 或者 white,black,blue.	black
kaptcha.border.thickness	边框厚度，合法值：>0	1
kaptcha.image.width	图片宽	200
kaptcha.image.height	图片高	50
kaptcha.producer.impl	图片实现类	com.google.code.kaptcha.impl.DefaultKaptcha
kaptcha.textproducer.impl	文本实现类	com.google.code.kaptcha.text.impl.DefaultTextCreator
kaptcha.textproducer.char.string	文本集合，验证码值从此集合中获取	abcde2345678gfynmnpwx
kaptcha.textproducer.char.length	验证码长度	5
kaptcha.textproducer.font.names	字体	Arial, Courier
kaptcha.textproducer.font.size	字体大小	40px
kaptcha.textproducer.font.color	字体颜色，合法值： r,g,b  或者 white,black,blue.	black
kaptcha.textproducer.char.space	文字间隔	2
kaptcha.noise.impl	干扰实现类	com.google.code.kaptcha.impl.DefaultNoise
kaptcha.noise.color	干扰颜色，合法值： r,g,b 或者 white,black,blue.	black
kaptcha.obscurificator.impl	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	com.google.code.kaptcha.impl.WaterRipple
kaptcha.background.impl	背景实现类	com.google.code.kaptcha.impl.DefaultBackground
kaptcha.background.clear.from	背景颜色渐变，开始颜色	light grey
kaptcha.background.clear.to	背景颜色渐变，结束颜色	white
kaptcha.word.impl	文字渲染器	com.google.code.kaptcha.text.impl.DefaultWordRenderer
kaptcha.session.key	session key	KAPTCHA_SESSION_KEY
kaptcha.session.date	session date	KAPTCHA_SESSION_DATE

Controller调用

*[HTML]:java
	import com.google.code.kaptcha.impl.DefaultKaptcha;
	import org.springframework.beans.factory.annotation.Autowired;
	import org.springframework.stereotype.Controller;
	import org.springframework.web.bind.annotation.RequestMapping;
	import org.springframework.web.bind.annotation.ResponseBody;
	
	import javax.servlet.http.HttpServletRequest;
	import java.util.HashMap;
	import java.util.Map;
	
	/**
	 * 验证码-controller
	 *
	 * @author cc
	 */
	@Controller
	@RequestMapping("wsd/loginCode")
	public class FrmLoginCodeControl{
	
	    @Autowired
	    private GoogleOverrideKaptcha overrideKaptcha;
	
	    @Autowired
	    private DefaultKaptcha captchaProducer;
	
	    /**
	     * 生成验证码
	     * @param request
	     */
	    @ResponseBody
	    @RequestMapping(value="/verificationCode")
	    public Map<String,Object> outputCaptcha(HttpServletRequest request) {
	        Map<String, Object> map = new HashMap<>();
	        String captchaBase64 = overrideKaptcha.render(request);
	        map.put("imgBase64", captchaBase64);
	        return map;
	    }
	}

前台调用

	<div class="login-main-content-row row3 clearfix" style="margin-top: 40px;float: left;margin-left: 43px;">
	      <input type="text" id="loginCode" autocomplete="off" style="font-size:24px;color: #a1d8ff;float: left;width: 80%;margin-left: -45px;"
	              name="loginCode" placeholder="验证码" />
	       <div style="float: right;margin-top: -8px;"><img id="codeImg" style="height: 34px;width: 100px;" src=""/></div>
	 </div>

	$(document).ready(function() {
	        changeCode();
	        $("#codeImg").bind("click", changeCode);
	    });
	    function genTimestamp() {
	        var time = new Date();
	        return time.getTime();
	    }
	    function changeCode() {
	        $.ajax({
	            url:"wsd/loginCode/verificationCode?t=" + genTimestamp(),
	            dataType : "json",
	            async : false,
	            success:function(data){
	                $("#codeImg").attr("src", data.imgBase64);
	            }
	        });
	    }

效果

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