kaptcha 验证码

1. baomidou提供的kaptcha-spring-boot-starter

pom

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

自定义验证码参数,以下为默认配置, yml配置

kaptcha:height: 50width: 200content:length: 4source: abcdefghjklmnopqrstuvwxyz23456789space: 2font:color: blackname: Arialsize: 40background-color:from: lightGrayto: whiteborder:enabled: truecolor: blackthickness: 1

controlller

import com.baomidou.kaptcha.Kaptcha;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;/*** 生成验证码服务** @author liuxb* @date 2022/5/18 15:17*/
@RestController
@RequestMapping("/kaptcha")
public class KaptchaController {@Autowiredprivate Kaptcha kaptcha;/*** 获取Kaptcha验证码，返回前端图片流*/@GetMapping("/kaptchaImg")public void kaptchaImg() {//默认900秒 15min有效期kaptcha.render();}/*** 验证验证码** @param code 验证码* @return*/@GetMapping("/valid")public boolean validDefaultTime(String code) {//default timeout 900 secondsreturn kaptcha.validate(code);}/*** 校验验证码是否在指定时间内有效* @param code*/@GetMapping("/validCustomTime")public boolean validCustomTime(String code) {return kaptcha.validate(code, 60);}
}

2. com.github.penggle封装的kaptcha

pom

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

配置类

import com.google.code.kaptcha.util.Config;@Configuration
public class KaptchaConfig {@Beanpublic DefaultKaptcha getDefaultKaptcha() {DefaultKaptcha defaultKaptcha=new DefaultKaptcha();Properties properties=new Properties();//是否有边框properties.setProperty(Constants.KAPTCHA_BORDER,"yes");//验证码文本颜色properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_COLOR,"blue");//验证码图片宽度properties.setProperty(Constants.KAPTCHA_IMAGE_WIDTH,"160");//验证码图片高度properties.setProperty(Constants.KAPTCHA_IMAGE_HEIGHT,"60");//文本字符大小properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_SIZE,"38");//验证码session的值properties.setProperty(Constants.KAPTCHA_SESSION_CONFIG_KEY,"kaptchaCode");//验证码文本长度properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_LENGTH,"4");//字体properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_NAMES, "宋体,楷体,微软雅黑");Config config = new Config(properties);defaultKaptcha.setConfig(config);return defaultKaptcha;}
}

controller
···java
@Controller
public class KaptchaController {
@Resource
private Producer kaptchaProducer;

@GetMapping("verify_code")
public void createVerifyCode(HttpServletRequest request, HttpServletResponse response) throws IOException {//响应立即过期response.setDateHeader("Expires", 0);//不缓存任何图片数据response.setHeader("Cache-Control", "no-store,no-cache,must-revalidate");response.setHeader("Cache-Control", "post-check=0,pre-check=0");response.setHeader("Pragma", "no-cache");response.setContentType("image/png");//生成验证码字符文本String verifyCode = kaptchaProducer.createText();request.getSession().setAttribute("kaptchaVerifyCode", verifyCode);System.out.println(request.getSession().getAttribute("kaptchaVerifyCode"));BufferedImage image = kaptchaProducer.createImage(verifyCode);//创建验证图片ServletOutputStream out = response.getOutputStream();ImageIO.write(image, "png", out);//输出和关闭输出out.flush();out.close();
}

/**
*校对验证码
* @param httpServletRequest
* @return
*/
@RequestMapping(value = “login”, method = RequestMethod.POST)
public boolean CheckDefaultKaptcha(@RequestBody LoginTwoVo loginTwoVo, HttpServletRequest request){
//得到session里面的，key为“vrifyCode”的value值
String captchaId = (String)request.getSession().getAttribute(“kaptchaVerifyCode”);
//输出该value值和自己测试时填写的值
System.out.println((“Session vrifyCode ---->” + captchaId + “---- form code —>” + loginTwoVo.getCode()));
//判断session里面的验证码与自己填写的值是否一致
if (!captchaId.equals(loginTwoVo.getCode())) {
System.out.println((“错误的验证码”));
return false;
} else {
//判断账号和密码是否一致
if(loginTwoVo.getUserName().equals(“wsw”)&&loginTwoVo.getPassword().equals(“123456”)){
System.out.println(“登录成功”);
return true;
}
return false;
}
}
}
····