参考代码一：
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
/**
* @author happy
*
*/
public class SpellImg {
public static void main(String[] args) {
try {
// 读取第一张图片
File fileOne = new File("E:\\Test\\5.png");
BufferedImage ImageOne = ImageIO.read(fileOne);
int width = ImageOne.getWidth();// 图片宽度
int height = ImageOne.getHeight();// 图片高度
// 从图片中读取RGB
int[] ImageArrayOne = new int[width * height];
ImageArrayOne = ImageOne.getRGB(0, 0, width, height, ImageArrayOne,
0, width);
// 对第二张图片做相同的处理
File fileTwo = new File("E:\\Test\\6.png");
BufferedImage ImageTwo = ImageIO.read(fileTwo);
int[] ImageArrayTwo = new int[width * height];
ImageArrayTwo = ImageTwo.getRGB(0, 0, width, height, ImageArrayTwo,
0, width);
// 生成新图片
// BufferedImage ImageNew = new BufferedImage(width * 2, height,
// BufferedImage.TYPE_INT_RGB);// （左右）
BufferedImage ImageNew = new BufferedImage(width, height * 2,
BufferedImage.TYPE_INT_ARGB); // （上下）
// TYPE_INT_ARGB（不丢失alpha）TYPE_INT_RGB（丢失alpha）
ImageNew.setRGB(0, 0, width, height, ImageArrayOne, 0, width);// 设置左半部分的RGB
// ImageNew.setRGB(width, 0, width, height, ImageArrayTwo, 0,
// width);// 设置右半部分的RGB（左右）
ImageNew.setRGB(0, height, width, height, ImageArrayTwo, 0, width);// 设置右半部分的RGB（上下）
File outFile = new File("E:\\Test\\8.png");
ImageIO.write(ImageNew, "png", outFile);// 写图片
System.out.println("success!");
} catch (Exception e) {
e.printStackTrace();
}
}
}
参考代码二：
/**
* Java拼接多张图片
*
* @param pics
* @param type
* @param dst_pic
* @return
*/
public static boolean merge(String[] pics, String type, String dst_pic) {
int len = pics.length;
if (len < 1) {
System.out.println("pics len < 1");
return false;
}
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(pics[i]);
images[i] = ImageIO.read(src[i]);
} catch (Exception e) {
e.printStackTrace();
return false;
}
int width = images[i].getWidth();
int height = images[i].getHeight();
ImageArrays[i] = new int[width * height];// 从图片中读取RGB
ImageArrays[i] = images[i].getRGB(0, 0, width, height,
ImageArrays[i], 0, width);
}
int dst_height = 0;
int dst_width = images[0].getWidth();
for (int i = 0; i < images.length; i++) {
dst_width = dst_width > images[i].getWidth() ? dst_width
: images[i].getWidth();
dst_height += images[i].getHeight();
}
System.out.println(dst_width);
System.out.println(dst_height);
if (dst_height < 1) {
System.out.println("dst_height < 1");
return false;
}
// 生成新图片
try {
// dst_width = images[0].getWidth();
BufferedImage ImageNew = new BufferedImage(dst_width, dst_height,
BufferedImage.TYPE_INT_RGB);
int height_i = 0;
for (int i = 0; i < images.length; i++) {
ImageNew.setRGB(0, height_i, dst_width, images[i].getHeight(),
ImageArrays[i], 0, dst_width);
height_i += images[i].getHeight();
}
File outFile = new File(dst_pic);
ImageIO.write(ImageNew, type, outFile);// 写图片
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}