切分和组合图片
切割图片
1. load 要切分的图片
2. 确定要切分成多少块
3. 计算小图片的高度和宽度
4. 切分图片
5. 保存图片
要切分图片：
[
java]
File file = new File("btg.jpg"); //
项目目录下有名为btg.jpg的图片
FileInputStream fis = new
FileInputStream(file);
BufferedImage image = ImageIO.read(fis);
//把文件读到图片缓冲流中
int rows = 4; //定义图片要切分成多少块
int cols
= 4;
int chunks = rows * cols;
int chunkWidth =
image.getWidth() / cols; // 计算每一块小图片的高度和宽度
int chunkHeight =
image.getHeight() / rows;
int count = 0;
BufferedImage
imgs[] = new BufferedImage[chunks];
for (int x = 0; x < rows;
x++) {
for (int y = 0; y < cols; y++) {
//初始化BufferedImage
imgs[count] = new
BufferedImage(chunkWidth, chunkHeight,
image.getType());
//画出每一小块图片
Graphics2D gr = imgs[count++].createGraphics();
gr.drawImage(image, 0, 0, chunkWidth, chunkHeight, chunkWidth * y, chunkHeight *
x, chunkWidth * y + chunkWidth, chunkHeight * x + chunkHeight,
null);
gr.dispose();
}
}
System.out.println("切分完成");
//保存小图片到文件中
for (int i = 0; i < imgs.length; i++)
{
ImageIO.write(imgs
, "jpg", new File("img" + i +
".jpg"));
}
System.out.println("小图片创建完成");
File file = new File("btg.jpg"); // 项目目录下有名为btg.jpg的图片
FileInputStream fis = new FileInputStream(file);
BufferedImage image
= ImageIO.read(fis); //把文件读到图片缓冲流中
int rows = 4;
//定义图片要切分成多少块
int cols = 4;
int chunks = rows *
cols;
int chunkWidth = image.getWidth() / cols; //
计算每一块小图片的高度和宽度
int chunkHeight = image.getHeight() /
rows;
int count = 0;
BufferedImage imgs[] = new
BufferedImage[chunks];
for (int x = 0; x < rows; x++)
{
for (int y = 0; y < cols; y++) {
//初始化BufferedImage
imgs[count] = new
BufferedImage(chunkWidth, chunkHeight,
image.getType());
//画出每一小块图片
Graphics2D gr = imgs[count++].createGraphics();
gr.drawImage(image, 0, 0, chunkWidth, chunkHeight, chunkWidth * y, chunkHeight *
x, chunkWidth * y + chunkWidth, chunkHeight * x + chunkHeight,
null);
gr.dispose();
}
}
System.out.println("切分完成");
//保存小图片到文件中
for (int i = 0; i < imgs.length; i++)
{
ImageIO.write(imgs, "jpg", new File("img" + i +
".jpg"));
}
System.out.println("小图片创建完成");
切分完成：
