引入依赖
<dependency>
<groupId>com.github.axet</groupId>
<artifactId>kaptcha</artifactId>
<version>0.0.9</version>
</dependency>Spring-mvc.xml 添加
<!-- Kaptcha 验证码生成器 -->
<bean name="producer" class="com.google.code.kaptcha.impl.DefaultKaptcha" scope="singleton">
<property name="config">
<bean class="com.google.code.kaptcha.util.Config">
<constructor-arg>
<props>
<prop key="kaptcha.border">no</prop>
<prop key="kaptcha.textproducer.font.color">black</prop>
<prop key="kaptcha.textproducer.char.space">5</prop>
<prop key="kaptcha.textproducer.char.length">5</prop>
<prop key="kaptcha.obscurificator.impl">com.google.code.kaptcha.impl.ShadowGimpy</prop>
<!-- kaptcha.border 是否有边框 默认为 true 我们可以自己设置 yes，no
kaptcha.border.color 边框颜色 默认为 Color.BLACK
kaptcha.border.thickness 边框粗细度 默认为 1
kaptcha.producer.impl 验证码生成器 默认为 DefaultKaptcha
kaptcha.textproducer.impl 验证码文本生成器 默认为 DefaultTextCreator
kaptcha.textproducer.char.string 验证码文本字符内容范围 默认为 abcde2345678gfynmnpwx
kaptcha.textproducer.char.length 验证码文本字符长度 默认为 5
kaptcha.textproducer.font.names 验证码文本字体样式 默认为 new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)
kaptcha.textproducer.font.size 验证码文本字符大小 默认为 40
kaptcha.textproducer.font.color 验证码文本字符颜色 默认为 Color.BLACK
kaptcha.textproducer.char.space 验证码文本字符间距 默认为 2
kaptcha.noise.impl 验证码噪点生成对象 默认为 DefaultNoise
kaptcha.noise.color 验证码噪点颜色 默认为 Color.BLACK
kaptcha.obscurificator.impl 验证码样式引擎 默认为 WaterRipple
kaptcha.word.impl 验证码文本字符渲染 默认为 DefaultWordRenderer
kaptcha.background.impl 验证码背景生成器 默认为 DefaultBackground
kaptcha.background.clear.from 验证码背景颜色渐进 默认为 Color.LIGHT_GRAY
kaptcha.background.clear.to 验证码背景颜色渐进 默认为 Color.WHITE
kaptcha.image.width 验证码图片宽度 默认为 200
kaptcha.image.height 验证码图片高度 默认为 50 -->
</props>
</constructor-arg>
</bean>
</property>
</bean>生成验证码
@RequestMapping(value = "/captchaImg", method = RequestMethod.GET)
public void image(HttpServletRequest request, HttpServletResponse response) throws Exception {response.setDateHeader("Expires", 0);
response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
response.addHeader("Cache-Control", "post-check=0, pre-check=0");
response.setHeader("Pragma", "no-cache");
response.setContentType("image/jpeg");
String capText = captchaProducer.createText();
// 生成图片验证码
BufferedImage image = captchaProducer.createImage(capText);
// 保存到 shiro session
SecurityUtils.getSubject().getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
ServletOutputStream out = response.getOutputStream();
ImageIO.write(image, "jpg", out);
try {out.flush();
} finally {out.close();
}
}验证验证码
@RequestMapping(value = "/captchaValid", method = RequestMethod.POST)
@ResponseBody
public Message captchaValid(String captcha) throws Exception {String kaptcha = SecurityUtils.getSubject().getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY).toString();
SecurityUtils.getSubject().getSession().removeAttribute(Constants.KAPTCHA_SESSION_KEY);
if (captcha.equalsIgnoreCase(kaptcha)) {return Message.success("验证成功");
}
return Message.error("验证码不正确");
}合并后为
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.apache.shiro.SecurityUtils;
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.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
/**
* Controller - 验证码
*
* @author liaoyx
* @version 1.0
*/
@Controller("mgmtCaptchaController")
@RequestMapping("/mgmt/captcha")
public class CaptchaController extends BaseController {
private Producer captchaProducer = null;
@Autowired
public void setCaptchaProducer(Producer captchaProducer) {this.captchaProducer = captchaProducer;}
@RequestMapping(value = "/captchaImg", method = RequestMethod.GET)
public void image(HttpServletRequest request, HttpServletResponse response) throws Exception {response.setDateHeader("Expires", 0);
response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
response.addHeader("Cache-Control", "post-check=0, pre-check=0");
response.setHeader("Pragma", "no-cache");
response.setContentType("image/jpeg");
String capText = captchaProducer.createText();
// 生成图片验证码
BufferedImage image = captchaProducer.createImage(capText);
// 保存到 shiro session
SecurityUtils.getSubject().getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
ServletOutputStream out = response.getOutputStream();
ImageIO.write(image, "jpg", out);
try {out.flush();
} finally {out.close();
}
}
@RequestMapping(value = "/captchaValid", method = RequestMethod.POST)
@ResponseBody
public Message captchaValid(String captcha) throws Exception {String kaptcha = SecurityUtils.getSubject().getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY).toString();
SecurityUtils.getSubject().getSession().removeAttribute(Constants.KAPTCHA_SESSION_KEY);
if (captcha.equalsIgnoreCase(kaptcha)) {return R.success("验证成功");
}
return R.error("验证码不正确");
}
} 参数详解