java验证码Kaptcha
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2022-04-22 23:51:41
aptcha 是一个可高度配置的实用验证码生成工具一、最新的maven源 com.github.penggle kaptcha
aptcha 是一个可高度配置的实用验证码生成工具
一、最新的maven源
<!-- https://mvnrepository.com/artifact/com.github.penggle/kaptcha -->
<dependency>
<groupId>com.github.penggle</groupId>
<artifactId>kaptcha</artifactId>
<version>2.3.2</version>
</dependency>
二、Kaptcha 详细配置表
Constant | 描述 | 默认值 |
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 |
三、使用示例:
需要编写两个类1个配置类和一个Controller
代码如下:
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import java.util.Properties;
/**
* KaptchaConfig
*/
@Configuration
public class KaptchaConfig{
/**
* 验证码 生成的bean
*/
@Bean
public DefaultKaptcha captchaProducer() {
DefaultKaptcha captchaProducer = new DefaultKaptcha();
Properties properties = new Properties();
properties.setProperty(Constants.KAPTCHA_IMAGE_WIDTH, "100");
properties.setProperty(Constants.KAPTCHA_IMAGE_HEIGHT, "30");
properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_SIZE, "22");
properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, "4");
properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_SPACE, "6");
properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_FONT_COLOR, "black");
properties.setProperty(Constants.KAPTCHA_BORDER_COLOR, "LIGHT_GRAY");
properties.setProperty(Constants.KAPTCHA_BACKGROUND_CLR_FROM, "WHITE");
properties.setProperty(Constants.KAPTCHA_NOISE_IMPL, "com.google.code.kaptcha.impl.NoNoise");
properties.setProperty(Constants.KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.ShadowGimpy");
properties.setProperty(Constants.KAPTCHA_TEXTPRODUCER_CHAR_STRING, "0123456789");
properties.setProperty(Constants.KAPTCHA_SESSION_CONFIG_KEY, "checkCode");
Config config = new Config(properties);
captchaProducer.setConfig(config);
return captchaProducer;
}
}
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
//http://localhost:3721/mapserver_war_exploded/kaptcha/getCode
@Controller
@RequestMapping("/kaptcha")
public class KaptchaController {
@Autowired
private Producer captchaProducer;
@RequestMapping("/getCode")
public ModelAndView getKaptchaImage(HttpServletRequest request, HttpServletResponse response) throws Exception {
response.setDateHeader("Expires", 0);
// Set standard HTTP/1.1 no-cache headers.
response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
// Set IE extended HTTP/1.1 no-cache headers (use addHeader).
response.addHeader("Cache-Control", "post-check=0, pre-check=0");
// Set standard HTTP/1.0 no-cache header.
response.setHeader("Pragma", "no-cache");
response.setContentType("image/jpeg");
// create the text for the image
String capText = captchaProducer.createText();
// store the text in the session
request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
// create the image with the text
BufferedImage bi = captchaProducer.createImage(capText);
ServletOutputStream out = response.getOutputStream();
// write the data out
ImageIO.write(bi, "jpg", out);
try {
out.flush();
} finally {
out.close();
}
return null;
}
}
本文地址:https://blog.csdn.net/gusushantang/article/details/109639919