U 升级为1.3.3

2026-05-07 06:04:34 +08:00 · 2022-08-25 11:09:18 +08:00
parent e288dc9b91
commit 0b636eaa9f
17 changed files with 229 additions and 84 deletions
@@ -2,8 +2,7 @@ package cloud.tianai.captcha.generator;

 import cloud.tianai.captcha.generator.common.model.dto.GenerateParam;
 import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
-import cloud.tianai.captcha.generator.common.util.CaptchaImageUtils;
-import cloud.tianai.captcha.generator.common.util.ImgWriter;
+import cloud.tianai.captcha.generator.impl.transform.Base64ImageTransform;
 import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
 import cloud.tianai.captcha.resource.common.model.dto.Resource;
 import lombok.Getter;
@@ -11,11 +10,7 @@ import lombok.Setter;
 import lombok.SneakyThrows;
 import lombok.extern.slf4j.Slf4j;

-import javax.imageio.ImageIO;
-import java.awt.image.BufferedImage;
-import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
-import java.util.Base64;
 import java.util.Map;

 /**
@@ -37,10 +32,12 @@ public abstract class AbstractImageCaptchaGenerator implements ImageCaptchaGener
    /** 默认滑块图片类型. */
    public String defaultSliderImageType = DEFAULT_SLIDER_IMAGE_TYPE;

-    @Getter
-    @Setter
    /** 资源管理器. */
    protected ImageCaptchaResourceManager imageCaptchaResourceManager;
+
+    /** 图片转换器. */
+    protected ImageTransform imageTransform;
+
    @Getter
    private boolean init = false;

@@ -55,6 +52,10 @@ public abstract class AbstractImageCaptchaGenerator implements ImageCaptchaGener
        init = true;
        try {
            log.info("图片验证码[{}]初始化...", this.getClass().getSimpleName());
+            // 设置默认图片转换器
+            if (getImageTransform() == null) {
+                setImageTransform(new Base64ImageTransform());
+            }
            doInit(initDefaultResource);
        } catch (Exception e) {
            init = false;
@@ -90,51 +91,6 @@ public abstract class AbstractImageCaptchaGenerator implements ImageCaptchaGener
        return doGenerateCaptchaImage(param);
    }

-
-    /**
-     * 将图片转换成字符串格式
-     *
-     * @param bufferedImage 图片
-     * @param formatType    格式化类型
-     * @return String
-     */
-    @SneakyThrows(Exception.class)
-    public String transform(BufferedImage bufferedImage, String formatType) {
-        // 这里判断处理一下,加一些警告日志
-        String result = beforeTransform(bufferedImage, formatType);
-        if (result != null) {
-            return result;
-        }
-        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
-        if (CaptchaImageUtils.isPng(formatType) || CaptchaImageUtils.isJpeg(formatType)) {
-            // 如果是 jpg 或者 png图片的话 用hutool的生成
-            ImgWriter.write(bufferedImage, formatType, byteArrayOutputStream, -1);
-        } else {
-            ImageIO.write(bufferedImage, formatType, byteArrayOutputStream);
-        }
-        //转换成字节码
-        byte[] data = byteArrayOutputStream.toByteArray();
-        String base64 = Base64.getEncoder().encodeToString(data);
-        return "data:image/" + formatType + ";base64,".concat(base64);
-    }
-
-    public String beforeTransform(BufferedImage bufferedImage, String formatType) {
-//        int type = bufferedImage.getType();
-//        if (BufferedImage.TYPE_4BYTE_ABGR == type) {
-//            // png , 如果转换的是jpg的话
-//            if (CaptchaImageUtils.isJpeg(formatType)) {
-//                // bufferedImage为 png， 但是转换的图片为 jpg
-//                if (log.isWarnEnabled()) {
-//                    log.warn("图片验证码转换警告， 原图为 png格式时，指定转换的图片为jpg格式时可能会导致转换异常，如果转换的图片为出现错误，请设置指定转换的类型与原图的类型一致");
-//                } else {
-//                    System.err.println("图片验证码转换警告， 原图为 png格式时，指定转换的图片为jpg格式时可能会导致转换异常，如果转换的图片为出现错误，请设置指定转换的类型与原图的类型一致");
-//                }
-//            }
-//        }
-        // 其它的暂时不考虑
-        return null;
-    }
-
    protected InputStream getTemplateFile(Map<String, Resource> templateImages, String imageName) {
        Resource resource = templateImages.get(imageName);
        if (resource == null) {
@@ -169,4 +125,19 @@ public abstract class AbstractImageCaptchaGenerator implements ImageCaptchaGener
    public ImageCaptchaResourceManager getImageResourceManager() {
        return imageCaptchaResourceManager;
    }
+
+    @Override
+    public void setImageResourceManager(ImageCaptchaResourceManager imageCaptchaResourceManager) {
+        this.imageCaptchaResourceManager = imageCaptchaResourceManager;
+    }
+
+    @Override
+    public ImageTransform getImageTransform() {
+        return imageTransform;
+    }
+
+    @Override
+    public void setImageTransform(ImageTransform imageTransform) {
+        this.imageTransform = imageTransform;
+    }
 }
@@ -15,6 +15,7 @@ public interface ImageCaptchaGenerator {

    /**
     * 初始化
+     *
     * @param initDefaultResource 是否初始化默认资源
     * @return ImageCaptchaGenerator
     */
@@ -55,4 +56,26 @@ public interface ImageCaptchaGenerator {
     */
    ImageCaptchaResourceManager getImageResourceManager();

+    /**
+     * 设置滑块验证码资源管理器
+     *
+     * @param imageCaptchaResourceManager
+     */
+    void setImageResourceManager(ImageCaptchaResourceManager imageCaptchaResourceManager);
+
+    /**
+     * 获取图片转换器
+     *
+     * @return ImageTransform
+     */
+    ImageTransform getImageTransform();
+
+    /**
+     * 设置图片转换器
+     *
+     * @param imageTransform imageTransform
+     * @return ImageTransform
+     */
+    void setImageTransform(ImageTransform imageTransform);
+
 }
@@ -14,9 +14,10 @@ public interface ImageCaptchaGeneratorProvider {
     * 生成/获取 ImageCaptchaGenerator
     *
     * @param resourceManager resourceManager
+     * @param imageTransform imageTransform
     * @return ImageCaptchaGenerator
     */
-    ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager);
+    ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager, ImageTransform imageTransform);

    /**
     * 验证码类型
@@ -0,0 +1,20 @@
+package cloud.tianai.captcha.generator;
+
+import java.awt.image.BufferedImage;
+
+/**
+ * @Author: 天爱有情
+ * @date 2022/8/25 10:21
+ * @Description 图片转换为字符串， 扩展接口, 可以转换为文件地址等
+ */
+public interface ImageTransform {
+
+    /**
+     * 转换
+     *
+     * @param bufferedImage 图片
+     * @param transformType 转换类型
+     * @return String
+     */
+    String transform(BufferedImage bufferedImage, String transformType);
+}
@@ -2,6 +2,7 @@ package cloud.tianai.captcha.generator.impl;

 import cloud.tianai.captcha.common.util.NamedThreadFactory;
 import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.common.model.dto.GenerateParam;
 import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
 import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
@@ -182,4 +183,19 @@ public class CacheImageCaptchaGenerator implements ImageCaptchaGenerator {
    public ImageCaptchaResourceManager getImageResourceManager() {
        return target.getImageResourceManager();
    }
+
+    @Override
+    public void setImageResourceManager(ImageCaptchaResourceManager imageCaptchaResourceManager) {
+        target.setImageResourceManager(imageCaptchaResourceManager);
+    }
+
+    @Override
+    public ImageTransform getImageTransform() {
+        return target.getImageTransform();
+    }
+
+    @Override
+    public void setImageTransform(ImageTransform imageTransform) {
+        target.setImageTransform(imageTransform);
+    }
 }
@@ -5,6 +5,7 @@ import cloud.tianai.captcha.common.util.ObjectUtils;
 import cloud.tianai.captcha.generator.AbstractImageCaptchaGenerator;
 import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
 import cloud.tianai.captcha.generator.ImageCaptchaGeneratorProvider;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.common.model.dto.GenerateParam;
 import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
 import cloud.tianai.captcha.generator.impl.provider.StandardConcatImageCaptchaGeneratorProvider;
@@ -33,10 +34,16 @@ public class MultiImageCaptchaGenerator extends AbstractImageCaptchaGenerator {
    private String defaultCaptcha = CaptchaTypeConstant.SLIDER;

    protected boolean initDefaultResource = false;
+
    public MultiImageCaptchaGenerator(ImageCaptchaResourceManager imageCaptchaResourceManager) {
        super(imageCaptchaResourceManager);
    }

+    public MultiImageCaptchaGenerator(ImageCaptchaResourceManager imageCaptchaResourceManager, ImageTransform imageTransform) {
+        super(imageCaptchaResourceManager);
+        setImageTransform(imageTransform);
+    }
+
    @Override
    protected void doInit(boolean initDefaultResource) {
        this.initDefaultResource = initDefaultResource;
@@ -94,8 +101,24 @@ public class MultiImageCaptchaGenerator extends AbstractImageCaptchaGenerator {
            }
            imageCaptchaGenerator = imageCaptchaGeneratorMap.computeIfAbsent(type, k ->
                    // get and init
-                    provider.get(getImageCaptchaResourceManager()).init(initDefaultResource));
+                    provider.get(getImageResourceManager(), getImageTransform()).init(initDefaultResource));
        }
        return imageCaptchaGenerator;
    }
+
+    @Override
+    public void setImageResourceManager(ImageCaptchaResourceManager imageCaptchaResourceManager) {
+        super.setImageResourceManager(imageCaptchaResourceManager);
+        for (ImageCaptchaGenerator imageCaptchaGenerator : imageCaptchaGeneratorMap.values()) {
+            imageCaptchaGenerator.setImageResourceManager(imageCaptchaResourceManager);
+        }
+    }
+
+    @Override
+    public void setImageTransform(ImageTransform imageTransform) {
+        super.setImageTransform(imageTransform);
+        for (ImageCaptchaGenerator imageCaptchaGenerator : imageCaptchaGeneratorMap.values()) {
+            imageCaptchaGenerator.setImageTransform(imageTransform);
+        }
+    }
 }
@@ -2,6 +2,7 @@ package cloud.tianai.captcha.generator.impl;

 import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
 import cloud.tianai.captcha.generator.AbstractImageCaptchaGenerator;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.common.model.dto.GenerateParam;
 import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
 import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
@@ -31,6 +32,11 @@ public class StandardConcatImageCaptchaGenerator extends AbstractImageCaptchaGen
        super(imageCaptchaResourceManager);
    }

+    public StandardConcatImageCaptchaGenerator(ImageCaptchaResourceManager imageCaptchaResourceManager, ImageTransform imageTransform) {
+        super(imageCaptchaResourceManager);
+        setImageTransform(imageTransform);
+    }
+
    @Override
    protected void doInit(boolean initDefaultResource) {
        if (initDefaultResource) {
@@ -80,7 +86,7 @@ public class StandardConcatImageCaptchaGenerator extends AbstractImageCaptchaGen

    @SneakyThrows
    private ImageCaptchaInfo wrapConcatCaptchaInfo(int randomX, int randomY, BufferedImage bgImage, GenerateParam param) {
-        String backGroundImageBase64 = transform(bgImage, param.getBackgroundFormatName());
+        String backGroundImageBase64 = getImageTransform().transform(bgImage, param.getBackgroundFormatName());
        ImageCaptchaInfo imageCaptchaInfo = ImageCaptchaInfo.of(backGroundImageBase64,
                null,
                bgImage.getWidth(),
@@ -2,6 +2,7 @@ package cloud.tianai.captcha.generator.impl;

 import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
 import cloud.tianai.captcha.common.util.FontUtils;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.common.model.dto.ClickImageCheckDefinition;
 import cloud.tianai.captcha.generator.common.model.dto.GenerateParam;
 import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
@@ -57,11 +58,13 @@ public class StandardRandomWordClickImageCaptchaGenerator extends AbstractClickI

    protected float currentFontTopCoef = 0.0f;

-    @SneakyThrows
    public StandardRandomWordClickImageCaptchaGenerator(ImageCaptchaResourceManager imageCaptchaResourceManager) {
        super(imageCaptchaResourceManager);
-        this.imageCaptchaResourceManager = imageCaptchaResourceManager;
+    }

+    public StandardRandomWordClickImageCaptchaGenerator(ImageCaptchaResourceManager imageCaptchaResourceManager, ImageTransform imageTransform) {
+        super(imageCaptchaResourceManager);
+        setImageTransform(imageTransform);
    }

    @Override
@@ -141,8 +144,8 @@ public class StandardRandomWordClickImageCaptchaGenerator extends AbstractClickI
        // 提示图片
        BufferedImage tipImage = genTipImage(checkClickImageCheckDefinitionList).getImage();
        ImageCaptchaInfo clickImageCaptchaInfo = new ImageCaptchaInfo();
-        clickImageCaptchaInfo.setBackgroundImage(transform(bgImage, param.getBackgroundFormatName()));
-        clickImageCaptchaInfo.setSliderImage(transform(tipImage, param.getSliderFormatName()));
+        clickImageCaptchaInfo.setBackgroundImage(getImageTransform().transform(bgImage, param.getBackgroundFormatName()));
+        clickImageCaptchaInfo.setSliderImage(getImageTransform().transform(tipImage, param.getSliderFormatName()));
        clickImageCaptchaInfo.setBgImageWidth(bgImage.getWidth());
        clickImageCaptchaInfo.setBgImageHeight(bgImage.getHeight());
        clickImageCaptchaInfo.setSliderImageWidth(tipImage.getWidth());
@@ -2,6 +2,7 @@ package cloud.tianai.captcha.generator.impl;

 import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
 import cloud.tianai.captcha.generator.AbstractImageCaptchaGenerator;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.common.constant.SliderCaptchaConstant;
 import cloud.tianai.captcha.generator.common.model.dto.GenerateParam;
 import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
@@ -29,11 +30,13 @@ import java.util.concurrent.ThreadLocalRandom;
 */
 public class StandardRotateImageCaptchaGenerator extends AbstractImageCaptchaGenerator {

-    protected final ImageCaptchaResourceManager imageCaptchaResourceManager;
-
    public StandardRotateImageCaptchaGenerator(ImageCaptchaResourceManager imageCaptchaResourceManager) {
        super(imageCaptchaResourceManager);
-        this.imageCaptchaResourceManager = imageCaptchaResourceManager;
+    }
+
+    public StandardRotateImageCaptchaGenerator(ImageCaptchaResourceManager imageCaptchaResourceManager, ImageTransform imageTransform) {
+        super(imageCaptchaResourceManager);
+        setImageTransform(imageTransform);
    }

    @Override
@@ -113,8 +116,8 @@ public class StandardRotateImageCaptchaGenerator extends AbstractImageCaptchaGen
    private ImageCaptchaInfo wrapRotateCaptchaInfo(double degree, int randomX, BufferedImage backgroundImage, BufferedImage sliderImage, GenerateParam param) {
        String backgroundFormatName = param.getBackgroundFormatName();
        String sliderFormatName = param.getSliderFormatName();
-        String backGroundImageBase64 = transform(backgroundImage, backgroundFormatName);
-        String sliderImageBase64 = transform(sliderImage, sliderFormatName);
+        String backGroundImageBase64 = getImageTransform().transform(backgroundImage, backgroundFormatName);
+        String sliderImageBase64 = getImageTransform().transform(sliderImage, sliderFormatName);
        return RotateImageCaptchaInfo.of(degree,
                randomX,
                backGroundImageBase64,
@@ -2,6 +2,7 @@ package cloud.tianai.captcha.generator.impl;

 import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
 import cloud.tianai.captcha.generator.AbstractImageCaptchaGenerator;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.common.constant.SliderCaptchaConstant;
 import cloud.tianai.captcha.generator.common.model.dto.GenerateParam;
 import cloud.tianai.captcha.generator.common.model.dto.ImageCaptchaInfo;
@@ -44,6 +45,11 @@ public class StandardSliderImageCaptchaGenerator extends AbstractImageCaptchaGen
        super(imageCaptchaResourceManager);
    }

+    public StandardSliderImageCaptchaGenerator(ImageCaptchaResourceManager imageCaptchaResourceManager, ImageTransform imageTransform) {
+        super(imageCaptchaResourceManager);
+        setImageTransform(imageTransform);
+    }
+
    @Override
    protected void doInit(boolean initDefaultResource) {
        if (initDefaultResource) {
@@ -127,8 +133,8 @@ public class StandardSliderImageCaptchaGenerator extends AbstractImageCaptchaGen
                                                        GenerateParam param) {
        String backgroundFormatName = param.getBackgroundFormatName();
        String sliderFormatName = param.getSliderFormatName();
-        String backGroundImageBase64 = transform(backgroundImage, backgroundFormatName);
-        String sliderImageBase64 = transform(sliderImage, sliderFormatName);
+        String backGroundImageBase64 = getImageTransform().transform(backgroundImage, backgroundFormatName);
+        String sliderImageBase64 = getImageTransform().transform(sliderImage, sliderFormatName);
        return SliderImageCaptchaInfo.of(randomX, randomY,
                backGroundImageBase64,
                sliderImageBase64,
@@ -3,8 +3,10 @@ package cloud.tianai.captcha.generator.impl.provider;
 import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
 import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
 import cloud.tianai.captcha.generator.ImageCaptchaGeneratorProvider;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.impl.StandardConcatImageCaptchaGenerator;
 import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
+
 /**
 * @Author: 天爱有情
 * @date 2022/5/19 15:12
@@ -12,8 +14,8 @@ import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
 */
 public class StandardConcatImageCaptchaGeneratorProvider implements ImageCaptchaGeneratorProvider {
    @Override
-    public ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager) {
-        return new StandardConcatImageCaptchaGenerator(resourceManager);
+    public ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager, ImageTransform imageTransform) {
+        return new StandardConcatImageCaptchaGenerator(resourceManager, imageTransform);
    }

    @Override
@@ -3,13 +3,14 @@ package cloud.tianai.captcha.generator.impl.provider;
 import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
 import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
 import cloud.tianai.captcha.generator.ImageCaptchaGeneratorProvider;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.impl.StandardRandomWordClickImageCaptchaGenerator;
 import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;

 public class StandardRandomWordClickImageCaptchaGeneratorProvider implements ImageCaptchaGeneratorProvider {
    @Override
-    public ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager) {
-        return new StandardRandomWordClickImageCaptchaGenerator(resourceManager);
+    public ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager, ImageTransform imageTransform) {
+        return new StandardRandomWordClickImageCaptchaGenerator(resourceManager, imageTransform);
    }

    @Override
@@ -3,6 +3,7 @@ package cloud.tianai.captcha.generator.impl.provider;
 import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
 import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
 import cloud.tianai.captcha.generator.ImageCaptchaGeneratorProvider;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.impl.StandardRotateImageCaptchaGenerator;
 import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;

@@ -13,8 +14,8 @@ import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
 */
 public class StandardRotateImageCaptchaGeneratorProvider implements ImageCaptchaGeneratorProvider {
    @Override
-    public ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager) {
-        return new StandardRotateImageCaptchaGenerator(resourceManager);
+    public ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager, ImageTransform imageTransform) {
+        return new StandardRotateImageCaptchaGenerator(resourceManager, imageTransform);
    }

    @Override
@@ -1,8 +1,9 @@
 package cloud.tianai.captcha.generator.impl.provider;

 import cloud.tianai.captcha.common.constant.CaptchaTypeConstant;
-import cloud.tianai.captcha.generator.ImageCaptchaGeneratorProvider;
 import cloud.tianai.captcha.generator.ImageCaptchaGenerator;
+import cloud.tianai.captcha.generator.ImageCaptchaGeneratorProvider;
+import cloud.tianai.captcha.generator.ImageTransform;
 import cloud.tianai.captcha.generator.impl.StandardSliderImageCaptchaGenerator;
 import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;

@@ -13,8 +14,8 @@ import cloud.tianai.captcha.resource.ImageCaptchaResourceManager;
 */
 public class StandardSliderImageImageCaptchaGeneratorProvider implements ImageCaptchaGeneratorProvider {
    @Override
-    public ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager) {
-        return new StandardSliderImageCaptchaGenerator(resourceManager);
+    public ImageCaptchaGenerator get(ImageCaptchaResourceManager resourceManager, ImageTransform imageTransform) {
+        return new StandardSliderImageCaptchaGenerator(resourceManager, imageTransform);
    }

    @Override
@@ -0,0 +1,58 @@
+package cloud.tianai.captcha.generator.impl.transform;
+
+import cloud.tianai.captcha.generator.ImageTransform;
+import cloud.tianai.captcha.generator.common.util.CaptchaImageUtils;
+import cloud.tianai.captcha.generator.common.util.ImgWriter;
+import lombok.SneakyThrows;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Base64;
+
+/**
+ * @Author: 天爱有情
+ * @date 2022/8/25 10:28
+ * @Description base64 实现
+ */
+public class Base64ImageTransform implements ImageTransform {
+
+    @Override
+    @SneakyThrows(IOException.class)
+    public String transform(BufferedImage bufferedImage, String transformType) {
+        // 这里判断处理一下,加一些警告日志
+        String result = beforeTransform(bufferedImage, transformType);
+        if (result != null) {
+            return result;
+        }
+        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+        if (CaptchaImageUtils.isPng(transformType) || CaptchaImageUtils.isJpeg(transformType)) {
+            // 如果是 jpg 或者 png图片的话 用hutool的生成
+            ImgWriter.write(bufferedImage, transformType, byteArrayOutputStream, -1);
+        } else {
+            ImageIO.write(bufferedImage, transformType, byteArrayOutputStream);
+        }
+        //转换成字节码
+        byte[] data = byteArrayOutputStream.toByteArray();
+        String base64 = Base64.getEncoder().encodeToString(data);
+        return "data:image/" + transformType + ";base64,".concat(base64);
+    }
+
+    public String beforeTransform(BufferedImage bufferedImage, String formatType) {
+//        int type = bufferedImage.getType();
+//        if (BufferedImage.TYPE_4BYTE_ABGR == type) {
+//            // png , 如果转换的是jpg的话
+//            if (CaptchaImageUtils.isJpeg(formatType)) {
+//                // bufferedImage为 png， 但是转换的图片为 jpg
+//                if (log.isWarnEnabled()) {
+//                    log.warn("图片验证码转换警告， 原图为 png格式时，指定转换的图片为jpg格式时可能会导致转换异常，如果转换的图片为出现错误，请设置指定转换的类型与原图的类型一致");
+//                } else {
+//                    System.err.println("图片验证码转换警告， 原图为 png格式时，指定转换的图片为jpg格式时可能会导致转换异常，如果转换的图片为出现错误，请设置指定转换的类型与原图的类型一致");
+//                }
+//            }
+//        }
+        // 其它的暂时不考虑
+        return null;
+    }
+}