import java.awt.AlphaComposite;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class NewImageUtils {
/**
*
* @Title: 构造图片
* @Description: 生成水印并返回java.awt.image.BufferedImage
* @param file
* 源文件(图片)
* @param waterFile
* 水印文件(图片)
* @param x
* 距离右下角的X偏移量
* @param y
* 距离右下角的Y偏移量
* @param alpha
* 透明度, 选择值从0.0~1.0: 完全透明~完全不透明
* @return BufferedImage
* @throws IOException
*/
public static BufferedImage
watermark(File file, File waterFile,
int x,
int y,
float alpha)
throws IOException {
BufferedImage buffImg = ImageIO.read(file);
BufferedImage waterImg = ImageIO.read(waterFile);
Graphics2D g2d = buffImg.createGraphics();
int waterImgWidth = waterImg.getWidth();
int waterImgHeight = waterImg.getHeight();
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha));
g2d.drawImage(waterImg, x, y, waterImgWidth, waterImgHeight,
null);
g2d.dispose();
return buffImg;
}
/**
* 输出水印图片
*
* @param buffImg
* 图像加水印之后的BufferedImage对象
* @param savePath
* 图像加水印之后的保存路径
*/
private void generateWaterFile(BufferedImage buffImg, String savePath) {
int temp = savePath.lastIndexOf(
".") +
1;
try {
ImageIO.write(buffImg, savePath.substring(temp),
new File(savePath));
}
catch (IOException e1) {
e1.printStackTrace();
}
}
/**
*
* @param args
* @throws IOException
* IO异常直接抛出了
* @author bls
*/
public static void main(String[] args)
throws IOException {
String sourceFilePath =
"D://img//di.png";
String waterFilePath =
"D://img//ceng.png";
String saveFilePath =
"D://img//new.png";
NewImageUtils newImageUtils =
new NewImageUtils();
BufferedImage buffImg = NewImageUtils.watermark(
new File(sourceFilePath),
new File(waterFilePath),
0,
0,
1.0f);
newImageUtils.generateWaterFile(buffImg, saveFilePath);
}
}
转载于:https://www.cnblogs.com/bilaisheng/p/10211056.html
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