java实现图片固定长宽的裁剪（不缩放）

青旅半醒 2022-04-02 07:09 393阅读 0赞

## java实现图片固定长宽的裁剪（不缩放） ##

**将aa文件夹中的所有图片裁剪成固定长宽的图片 （不缩放）**

import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.IOException;
    import javax.imageio.ImageIO;
    
    public class DeepSearchDir {
    
        /**
         * @param args
         * @throws IOException 
         */
        public static void main(String[] args) throws IOException {
            File dir=new File("E:\\aa");
            listDir(dir,1);
        }
    
        private static void listDir(File dir,int level) throws IOException {
        	String dirString=dir.toString();
            File files[]=dir.listFiles();
            level++;
            for(File f:files){
                if(f.isDirectory()){   	
                    listDir(f,level);       
                }
                else {       
                	 BufferedImage bufferedimage=ImageIO.read(f);
                     int width = bufferedimage.getWidth();
                     int height = bufferedimage.getHeight();
                     //目标将图片裁剪成 宽500，高300
                     if (width > 500) {
                                                                         /*开始x坐标              开始y坐标             结束x坐标                     结束y坐标*/
                         bufferedimage=ImgUtils.cropImage(bufferedimage,(int) ((width - 500) / 2),0,(int) (width - (width-500) / 2),(int) (height)
                                 );
                         if (height > 300) {
                             bufferedimage=ImgUtils.cropImage(bufferedimage,0,(int) ((height - 300) / 2),500,(int) (height - (height - 300) / 2)
                                     );
                         }
                     }else{
                         if (height > 300) {
                             bufferedimage=ImgUtils.cropImage(bufferedimage,0,(int) ((height - 300) / 2),(int) (width),(int) (height - (height - 300) / 2)
                                     );
                         }
                     }
                     ImageIO.write(bufferedimage, "jpg", f);    //输出裁剪图片
                 }
                }
            }
       
        /**
         * 裁剪图片方法
         * @param bufferedImage 图像源
         * @param startX 裁剪开始x坐标
         * @param startY 裁剪开始y坐标
         * @param endX 裁剪结束x坐标
         * @param endY 裁剪结束y坐标
         * @return
         */
        public static BufferedImage cropImage(BufferedImage Image, int startX, int startY, int endX, int endY) {
               int width = Image.getWidth();
               int height = Image.getHeight();
               if (startX == -1) {
                   startX = 0;
               }
               if (startY == -1) {
                   startY = 0;
               }
               if (endX == -1) {
                   endX = width - 1;
               }
               if (endY == -1) {
                   endY = height - 1;
               }
               BufferedImage result = new BufferedImage(endX - startX, endY - startY, 4);
               for (int x = startX; x < endX; ++x) {
                   for (int y = startY; y < endY; ++y) {
                       int rgb = Image.getRGB(x, y);
                       result.setRGB(x - startX, y - startY, rgb);
                   }
               }
               return result;
           }
          }