kaptcha：验证码插件使用参考
项目参考：oschina开源项目若依
1.添加maven
<!--验证码 -->
<kaptcha.version>2.3.2</kaptcha.version>
<dependency>
<groupId>com.github.penggle</groupId>
<artifactId>kaptcha</artifactId>
<version>${
kaptcha.version}</version>
</dependency>
2.编写配置类
package com.ruoyi.framework.config;
import java.util.Properties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import static com.google.code.kaptcha.Constants.*;
/**
* 验证码配置
*
* @author ruoyi
*/
@Configuration
public class CaptchaConfig
{
@Bean(name = "captchaProducer")
public DefaultKaptcha getKaptchaBean()
{
DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
Properties properties = new Properties();
// 是否有边框 默认为true 我们可以自己设置yes，no
properties.setProperty(KAPTCHA_BORDER, "yes");
// 验证码文本字符颜色 默认为Color.BLACK
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_COLOR, "black");
// 验证码图片宽度 默认为200
properties.setProperty(KAPTCHA_IMAGE_WIDTH, "160");
// 验证码图片高度 默认为50
properties.setProperty(KAPTCHA_IMAGE_HEIGHT, "60");
// 验证码文本字符大小 默认为40
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_SIZE, "38");
// KAPTCHA_SESSION_KEY
properties.setProperty(KAPTCHA_SESSION_CONFIG_KEY, "kaptchaCode");
// 验证码文本字符长度 默认为5
properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "4");
// 验证码文本字体样式 默认为new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_NAMES, "Arial,Courier");
// 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
properties.setProperty(KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.ShadowGimpy");
Config config = new Config(properties);
defaultKaptcha.setConfig(config);
return defaultKaptcha;
}
@Bean(name = "captchaProducerMath")
public DefaultKaptcha getKaptchaBeanMath()
{
DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
Properties properties = new Properties();
// 是否有边框 默认为true 我们可以自己设置yes，no
properties.setProperty(KAPTCHA_BORDER, "yes");
// 边框颜色 默认为Color.BLACK
properties.setProperty(KAPTCHA_BORDER_COLOR, "105,179,90");
// 验证码文本字符颜色 默认为Color.BLACK
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_COLOR, "blue");
// 验证码图片宽度 默认为200
properties.setProperty(KAPTCHA_IMAGE_WIDTH, "160");
// 验证码图片高度 默认为50
properties.setProperty(KAPTCHA_IMAGE_HEIGHT, "60");
// 验证码文本字符大小 默认为40
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_SIZE, "35");
// KAPTCHA_SESSION_KEY
properties.setProperty(KAPTCHA_SESSION_CONFIG_KEY, "kaptchaCodeMath");
// 验证码文本生成器
properties.setProperty(KAPTCHA_TEXTPRODUCER_IMPL, "com.ruoyi.framework.config.KaptchaTextCreator");
// 验证码文本字符间距 默认为2
properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_SPACE, "3");
// 验证码文本字符长度 默认为5
properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "6");
// 验证码文本字体样式 默认为new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)
properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_NAMES, "Arial,Courier");
// 验证码噪点颜色 默认为Color.BLACK
properties.setProperty(KAPTCHA_NOISE_COLOR, "white");
// 干扰实现类
properties.setProperty(KAPTCHA_NOISE_IMPL, "com.google.code.kaptcha.impl.NoNoise");
// 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
properties.setProperty(KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.ShadowGimpy");
Config config = new Config(properties);
defaultKaptcha.setConfig(config);
return defaultKaptcha;
}
}
3.编写验证码文本生成器类
package com.ruoyi.framework.config;
import java.security.SecureRandom;
import java.util.Random;
import com.google.code.kaptcha.text.impl.DefaultTextCreator;
/**
* 验证码文本生成器
*
* @author ruoyi
*/
public class KaptchaTextCreator extends DefaultTextCreator
{
private static final String[] CNUMBERS = "0,1,2,3,4,5,6,7,8,9,10".split(",");
@Override
public String getText()
{
Integer result = 0;
Random random = new SecureRandom();
int x = random.nextInt(10);
int y = random.nextInt(10);
StringBuilder suChinese = new StringBuilder();
int randomoperands = (int) Math.round(Math.random() * 2);
if (randomoperands == 0)
{
result = x * y;
suChinese.append(CNUMBERS[x]);
suChinese.append("*");
suChinese.append(CNUMBERS[y]);
}
else if (randomoperands == 1)
{
if (!(x == 0) && y % x == 0)
{
result = y / x;
suChinese.append(CNUMBERS[y]);
suChinese.append("/");
suChinese.append(CNUMBERS[x]);
}
else
{
result = x + y;
suChinese.append(CNUMBERS[x]);
suChinese.append("+");
suChinese.append(CNUMBERS[y]);
}
}
else if (randomoperands == 2)
{
if (x >= y)
{
result = x - y;
suChinese.append(CNUMBERS[x]);
suChinese.append("-");
suChinese.append(CNUMBERS[y]);
}
else
{
result = y - x;
suChinese.append(CNUMBERS[y]);
suChinese.append("-");
suChinese.append(CNUMBERS[x]);
}
}
else
{
result = x + y;
suChinese.append(CNUMBERS[x]);
suChinese.append("+");
suChinese.append(CNUMBERS[y]);
}
suChinese.append("=?@" + result);
return suChinese.toString();
}
}
4.控制层使用
package com.ruoyi.web.controller.system;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import com.ruoyi.common.core.controller.BaseController;
/**
* 图片验证码（支持算术形式）
*
* @author ruoyi
*/
@Controller
@RequestMapping("/captcha")
public class SysCaptchaController extends BaseController
{
@Resource(name = "captchaProducer")
private Producer captchaProducer;
@Resource(name = "captchaProducerMath")
private Producer captchaProducerMath;
/**
* 验证码生成
*/
@GetMapping(value = "/captchaImage")
public ModelAndView getKaptchaImage(HttpServletRequest request, HttpServletResponse response)
{
ServletOutputStream out = null;
try
{
HttpSession session = request.getSession();
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 type = request.getParameter("type");
String capStr = null;
String code = null;
BufferedImage bi = null;
if ("math".equals(type))
{
String capText = captchaProducerMath.createText();
capStr = capText.substring(0, capText.lastIndexOf("@"));
code = capText.substring(capText.lastIndexOf("@") + 1);
bi = captchaProducerMath.createImage(capStr);
}
else if ("char".equals(type))
{
capStr = code = captchaProducer.createText();
bi = captchaProducer.createImage(capStr);
}
session.setAttribute(Constants.KAPTCHA_SESSION_KEY, code);
out = response.getOutputStream();
ImageIO.write(bi, "jpg", out);
out.flush();
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
try
{
if (out != null)
{
out.close();
}
}
catch (IOException e)
{
e.printStackTrace();
}
}
return null;
}
}
5. thymeleaf模板调用
<div class="col-xs-6">
<a href="javascript:void(0);" title="点击更换验证码">
<!--<img th:src="@{captcha/captchaImage?type=math}" class="imgcode" width="85%"/>-->
<img th:src="@{captcha/captchaImage(type=${captchaType})}" class="imgcode" width="85%"/>
</a>
</div>