From 3ddf7bd0e9b1ae8b08f377d1839ff13d3a7b32d3 Mon Sep 17 00:00:00 2001
From: Jerry Yan <792602257@qq.com>
Date: Tue, 18 Nov 2025 17:32:04 +0800
Subject: [PATCH] =?UTF-8?q?feat(image):=20=E6=B7=BB=E5=8A=A0=E5=9B=BE?=
 =?UTF-8?q?=E7=89=87180=E5=BA=A6=E6=97=8B=E8=BD=AC=E5=8A=9F=E8=83=BD?=
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- 新增rotateImage180方法实现图片180度旋转
- 支持源文件读取和目标文件写入
- 使用AffineTransform实现图像旋转变换
- 保持图片原始尺寸不变
- 添加详细的异常处理和资源释放
- 移除对270度旋转的限制检查
---
 .../java/com/ycwl/basic/utils/ImageUtils.java | 50 +++++++++++++++++--
 1 file changed, 46 insertions(+), 4 deletions(-)

diff --git a/src/main/java/com/ycwl/basic/utils/ImageUtils.java b/src/main/java/com/ycwl/basic/utils/ImageUtils.java
index fc62ba96..7a07d4e0 100644
--- a/src/main/java/com/ycwl/basic/utils/ImageUtils.java
+++ b/src/main/java/com/ycwl/basic/utils/ImageUtils.java
@@ -193,6 +193,52 @@ public class ImageUtils {
         }
     }
 
+    /**
+     * 旋转图片180度
+     *
+     * @param sourceFile 源图片文件
+     * @param targetFile 目标图片文件
+     * @throws IOException 读取或写入文件失败
+     */
+    public static void rotateImage180(File sourceFile, File targetFile) throws IOException {
+        BufferedImage sourceImage = null;
+        BufferedImage rotatedImage = null;
+        try {
+            sourceImage = ImageIO.read(sourceFile);
+            if (sourceImage == null) {
+                throw new IOException("无法读取图片文件: " + sourceFile.getPath());
+            }
+
+            int width = sourceImage.getWidth();
+            int height = sourceImage.getHeight();
+
+            // 创建旋转后的图片(宽高不变)
+            rotatedImage = new BufferedImage(width, height, sourceImage.getType());
+            Graphics2D g2d = rotatedImage.createGraphics();
+
+            // 设置旋转变换
+            AffineTransform transform = new AffineTransform();
+            transform.translate(width / 2.0, height / 2.0);
+            transform.rotate(Math.PI);
+            transform.translate(-width / 2.0, -height / 2.0);
+
+            g2d.setTransform(transform);
+            g2d.drawImage(sourceImage, 0, 0, null);
+            g2d.dispose();
+
+            // 保存旋转后的图片
+            ImageIO.write(rotatedImage, "jpg", targetFile);
+            log.info("图片旋转180度成功,尺寸保持: {}x{}", width, height);
+        } finally {
+            if (sourceImage != null) {
+                sourceImage.flush();
+            }
+            if (rotatedImage != null) {
+                rotatedImage.flush();
+            }
+        }
+    }
+
     /**
      * 智能裁切图片以填充目标尺寸,支持自动旋转以减少裁切损失
      *
@@ -330,10 +376,6 @@ public class ImageUtils {
             return source;
         }
 
-        if (degrees != 270) {
-            throw new IllegalArgumentException("仅支持270度旋转");
-        }
-
         int width = source.getWidth();
         int height = source.getHeight();