javaweb第三方验证码（即取即用）

小咪咪 2022-02-24 15:26 386阅读 0赞

本文只总结两种，一个是谷歌的，一个是hutool的，看个人喜好，都挺好用

一、谷歌验证码

1.首先引入maven依赖

<dependency>
                <groupId>com.github.penggle</groupId>
                <artifactId>kaptcha</artifactId>
                <version>2.3.2</version>
            </dependency>

2.然后定义KaptchaConfig类

import java.util.Properties;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.stereotype.Component;
    
    import com.google.code.kaptcha.impl.DefaultKaptcha;
    import com.google.code.kaptcha.util.Config;
    
    @Component
    public class KaptchaConfig {
        @Bean
        public DefaultKaptcha getDefaultKaptcha() {
            com.google.code.kaptcha.impl.DefaultKaptcha defaultKaptcha = new com.google.code.kaptcha.impl.DefaultKaptcha();
            Properties properties = new Properties();
            // 图片边框
            properties.setProperty("kaptcha.border", "yes");
            // 边框颜色
            properties.setProperty("kaptcha.border.color", "105,179,90");
            // 字体颜色
            properties.setProperty("kaptcha.textproducer.font.color", "red");
            // 图片宽
            properties.setProperty("kaptcha.image.width", "110");
            // 图片高
            properties.setProperty("kaptcha.image.height", "40");
            // 字体大小
            properties.setProperty("kaptcha.textproducer.font.size", "30");
            // session key
            properties.setProperty("kaptcha.session.key", "code");
            // 验证码长度
            properties.setProperty("kaptcha.textproducer.char.length", "4");
            // 字体
            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.最后实现验证码接口

import com.alibaba.fastjson.JSONObject;
    import com.google.code.kaptcha.impl.DefaultKaptcha;
    import com.risktech.common.UUIDUtils;
    import com.risktech.common.bean.Result;
    import com.risktech.common.bean.configuration.WebConfig;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import javax.imageio.ImageIO;
    import javax.servlet.ServletOutputStream;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import java.awt.image.BufferedImage;
    import java.io.ByteArrayOutputStream;
    
    
    @RestController
    @RequestMapping("/code")
    public class CaptchaController {
    
        /**
         * 1、验证码工具
         */
        @Autowired
        private DefaultKaptcha defaultKaptcha;
    
        /**
         * 2、生成验证码
         *
         * @param httpServletRequest
         * @param httpServletResponse
         * @throws Exception
         */
        @ApiOperation(value = "获取验证码接口", notes = "")
        @RequestMapping("/captcha-image")
        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 = defaultKaptcha.createText();
                httpServletRequest.getSession().setAttribute("rightCode", createText);
                // 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 = defaultKaptcha.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();
        }
    }

二、hutool验证码

1.首先引入maven依赖

<dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-all</artifactId>
                <version>4.4.5</version>
            </dependency>

2.实现验证码接口

/**
         * hutool验证码
         *
         * @throws Exception
         */
        @RequestMapping("/hutool/captcha-image")
        public void HutoolKaptcha(HttpServletResponse httpServletResponse,HttpServletRequest httpServletRequest){
            //定义图形验证码的长、宽、验证码字符数、干扰元素个数
            CircleCaptcha captcha = CaptchaUtil.createCircleCaptcha(110, 40, 4, 20);
            //生成验证码秘钥
            String uuid = UUIDUtils.getUUID();
            Cookie cookie = new Cookie(WebConfig.RIGHT_CODE_KEY,uuid);
            cookie.setPath("/");
            cookie.setMaxAge(60);
            httpServletResponse.addCookie(cookie);
    //        httpServletResponse.setHeader("Set-Cookie",WebConfig.RIGHT_CODE_KEY+"="+uuid);
            //图形验证码写出，可以写出到文件，也可以写出到流
            httpServletRequest.getSession().setAttribute("rightCode",captcha.getCode());
            httpServletResponse.setHeader("Cache-Control", "no-store");
            httpServletResponse.setHeader("Pragma", "no-cache");
            httpServletResponse.setDateHeader("Expires", 0);
            httpServletResponse.setContentType("image/jpeg");
            ServletOutputStream responseOutputStream = httpServletResponse.getOutputStream();
            captcha.write(responseOutputStream);
            responseOutputStream.flush();
            responseOutputStream.close();
    
        }

完事，大家记得点赞，谢谢观看