图片统一剪切

import org.springframework.stereotype.Service;

import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;
@Service
public class ImageService {

    private static List<File> fileList = new ArrayList<File>();

   /* public static void main(String[] args) {
        System.out.println("输入需要去水印的图片所在的根目录回车（支持递归子目录）：");
        Scanner input = new Scanner(System.in);
        String dir = input.nextLine().trim();

        System.out.println("输入转换后的存储目录：");
        String saveDir = input.nextLine().trim();

        System.out.println("输入y开始");
        String comfrm = input.nextLine().trim();
        if (comfrm.equals("y")) {
            convertAllImages(dir, saveDir);
        } else {
            System.out.println("您输入的不是y程序,程序退出");
        }

    }
*/

    /**
     * 遍历文件
     * @param dir
     * @param saveDir
     */
    public static Boolean convertAllImages(String dir, String saveDir) {
        File dirFile = new File(dir);
        File saveDirFile = new File(saveDir);

        if(!saveDirFile.exists()){
            saveDirFile.mkdir();
        }
        dir = dirFile.getAbsolutePath();
        saveDir = saveDirFile.getAbsolutePath();
        loadImages(new File(dir));
        for (File file : fileList) {
            String filePath = file.getAbsolutePath();

            String dstPath = saveDir + filePath.substring(filePath.indexOf(dir) + dir.length(), filePath.length());
//            System.out.println("filePath: " + filePath);
//            System.out.println("dstPath:"+dstPath);
            try {
                //剪切图片
                ImageService.cutImage(filePath,dstPath);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return  true;
    }

    /**
     * 获取文件名
     * @param f
     */
    public static void loadImages(File f) {
        if (f != null) {
            if (f.isDirectory()) {
                File[] fileArray = f.listFiles();
                if (fileArray != null) {
                    for (int i = 0; i < fileArray.length; i++) {
                        //递归调用
                        loadImages(fileArray[i]);
                    }
                }
            } else {
                String name = f.getName();
                if (name.endsWith("png") || name.endsWith("jpg")) {
                    fileList.add(f);
                }
            }
        }
    }


    /**  裁剪图片
     *      * @param x          剪切横向起始位置
     *      * @param y          剪切纵向起始位置
     *      * @param width      剪切宽度
     *      * @param height     剪切宽度
     *     @param inputFile    输入文件
     *     @param outputFile   输出文件
     * @throws IOException
     */
    public static void cutImage(String inputFile,
                                String outputFile) throws IOException {
        String type = "jpg";
        // 裁剪的位置
        int x = 0;
        int y = 0;
        int width = 0;
        int height = 0;

        // 文件地址
        File file = new File(inputFile);
        InputStream input = new FileInputStream(file);

        BufferedImage sourceImg = ImageIO.read(new FileInputStream(file));

//        System.out.println(String.format("Size: %.1f KB", file.length()/1024.0));
//        System.out.println("Width: " + sourceImg.getWidth());
//        System.out.println("Height: " + sourceImg.getHeight());

        width=sourceImg.getWidth();
        height=sourceImg.getHeight()-80;

        ImageInputStream imageStream = null;
        try {
            // 图片类型 默认 jpg
            String imageType = (null == type || "".equals(type)) ? "jpg" : type;
            // 将图片转化为 imageReader
            Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageType);
            ImageReader reader = readers.next();
            // 读入图片
            imageStream = ImageIO.createImageInputStream(input);
            reader.setInput(imageStream, true);
            // 参数
            ImageReadParam param = reader.getDefaultReadParam();
            // 图片裁剪范围
            Rectangle rect = new Rectangle(x, y, width, height);
            param.setSourceRegion(rect);
            // 裁剪出图片
            BufferedImage bi = reader.read(0, param);
            // 输出达到文件夹
            ImageIO.write(bi, imageType, new File(outputFile));
        } catch (Exception e) {

        } finally {
            // 关闭stream
          //  imageStream.close();
        }
    }

}