JAVA 图片拼接

import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
public class MergeImageUtil {
	/**
	 * 拼接图片（注：图片需长宽一致）
	 * @param files  img1 ，img2
	 * @param type  1：横向拼接 2：纵向拼接
	 * @param targetFile 合成新的图片地址
	 */
	public static void mergeImage(String[] files, int type, String targetFile) {
		int len = files.length;
		if (len < 1) {
			throw new RuntimeException("图片数量小于1");
		}
		File[] src = new File[len];
		BufferedImage[] images = new BufferedImage[len];
		int[][] ImageArrays = new int[len][];
		for (int i = 0; i < len; i++) {
			try {
				src[i] = new File(files[i]);
				images[i] = ImageIO.read(src[i]);
			}
			catch (Exception e) {
				throw new RuntimeException(e);
			}
			int width = images[i].getWidth();
			int height = images[i].getHeight();
			ImageArrays[i] = new int[width * height];
			ImageArrays[i] = images[i].getRGB(0, 0, width, height, ImageArrays[i], 0, width);
		}
		int newHeight = 0;
		int newWidth = 0;
		for (int i = 0; i < images.length; i++) {
			// 横向
			if (type == 1) {
				newHeight = newHeight > images[i].getHeight() ? newHeight : images[i].getHeight();
				newWidth += images[i].getWidth();
			} else if (type == 2) {
				// 纵向
				newWidth = newWidth > images[i].getWidth() ? newWidth : images[i].getWidth();
				newHeight += images[i].getHeight();
			}
		}
		if (type == 1 && newWidth < 1) {
			return;
		}
		if (type == 2 && newHeight < 1) {
			return;
		}
		// 生成新图片
		try {
			BufferedImage ImageNew = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
			int height_i = 0;
			int width_i = 0;
			for (int i = 0; i < images.length; i++) {
				if (type == 1) {
					ImageNew.setRGB(width_i, 0, images[i].getWidth(), newHeight, ImageArrays[i], 0,
						      images[i].getWidth());
					width_i += images[i].getWidth();
				} else if (type == 2) {
					ImageNew.setRGB(0, height_i, newWidth, images[i].getHeight(), ImageArrays[i], 0, newWidth);
					height_i += images[i].getHeight();
				}
			}
			//输出想要的图片
			ImageIO.write(ImageNew, targetFile.split("\\.")[1], new File(targetFile));
		}
		catch (Exception e) {
			throw new RuntimeException(e);
		}
	}
}