Class ImageCaptchaRenderer

java.lang.Object
cloud.opencode.base.captcha.renderer.ImageCaptchaRenderer
All Implemented Interfaces:
CaptchaRenderer
public final class ImageCaptchaRenderer extends Object implements CaptchaRenderer
Image Captcha Renderer - Renders CAPTCHA as PNG image 图像验证码渲染器 - 将验证码渲染为 PNG 图像

Features | 主要功能:

  • PNG image output - PNG图像输出
  • Binary image rendering - 二进制图像渲染

Usage Examples | 使用示例:

CaptchaRenderer renderer = new ImageCaptchaRenderer();
renderer.render(captcha, outputStream);

Security | 安全性:

  • Thread-safe: Yes (stateless) - 线程安全: 是（无状态）
  • Null-safe: No (captcha must not be null) - 空值安全: 否（验证码不能为null）
Since:
JDK 25, opencode-base-captcha V1.0.0
Author:
Leon Soo www.LeonSoo.com
See Also:

  • Constructor Details

    • ImageCaptchaRenderer

      public ImageCaptchaRenderer()

  • Method Details

    • render

      public void render(Captcha captcha, OutputStream out) throws IOException
      Description copied from interface: CaptchaRenderer
      Renders the CAPTCHA to an output stream. 将验证码渲染到输出流。
      Specified by:
      render in interface CaptchaRenderer
      Parameters:
      captcha - the CAPTCHA | 验证码
      out - the output stream | 输出流
      Throws:
      IOException - if rendering fails | 如果渲染失败

    • renderToBytes

      public byte[] renderToBytes(Captcha captcha)
      Description copied from interface: CaptchaRenderer
      Renders the CAPTCHA to a byte array. 将验证码渲染到字节数组。
      Specified by:
      renderToBytes in interface CaptchaRenderer
      Parameters:
      captcha - the CAPTCHA | 验证码
      Returns:
      the rendered bytes | 渲染的字节

    • renderToBase64

      public String renderToBase64(Captcha captcha)
      Description copied from interface: CaptchaRenderer
      Renders the CAPTCHA to a Base64 string. 将验证码渲染到 Base64 字符串。
      Specified by:
      renderToBase64 in interface CaptchaRenderer
      Parameters:
      captcha - the CAPTCHA | 验证码
      Returns:
      the Base64 string | Base64 字符串

    • getContentType

      public String getContentType()
      Description copied from interface: CaptchaRenderer
      Gets the content type of the rendered output. 获取渲染输出的内容类型。
      Specified by:
      getContentType in interface CaptchaRenderer
      Returns:
      the content type | 内容类型