DefaultKaptcha是一个自定义程度高的验证码
1、引入相关依赖
<!--验证码 -->
<dependency>
<groupId>pro.fessional</groupId>
<artifactId>kaptcha</artifactId>
</dependency>
2、配置CaptchaConfig相关的参数定义bean后续调用
@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;
}
3、验证码处理类(生成图片,以流的方式创建base64图片信息供页面展示)
public AjaxResult createCaptcha() throws IOException, CaptchaException {
AjaxResult ajax = AjaxResult.success();
boolean captchaEnabled = captchaProperties.getEnabled();
ajax.put("captchaEnabled", captchaEnabled);
if (!captchaEnabled)
{
return ajax;
}
// 保存验证码信息
String uuid = IdUtils.simpleUUID();
String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;
String capStr = null, code = null;
BufferedImage image = null;
String captchaType = captchaProperties.getType();
// 生成验证码
if ("math".equals(captchaType))
{
String capText = captchaProducerMath.createText();
capStr = capText.substring(0, capText.lastIndexOf("@"));
code = capText.substring(capText.lastIndexOf("@") + 1);
image = captchaProducerMath.createImage(capStr);
}
else if ("char".equals(captchaType))
{
capStr = code = captchaProducer.createText();
image = captchaProducer.createImage(capStr);
}
//redisService.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
// 转换流信息写出
FastByteArrayOutputStream os = new FastByteArrayOutputStream();
try
{
ImageIO.write(image, "jpg", os);
}
catch (IOException e)
{
return AjaxResult.error(e.getMessage());
}
ajax.put("uuid", uuid);
ajax.put("img", Base64.encode(os.toByteArray()));
return ajax;
}