Java实现给图片添加水印详细教程二

不废话，直接代码展示:

package michael.io.image;

import java.awt.AlphaComposite;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageDecoder;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

/*
图片水印

@author Jack
/
public class ImageMarkLogoByIcon {

/*
@param args
/
public static void main(String[] args) {
String srcImgPath = “d:/test/michael/myblog_01.png”;
String iconPath = “d:/test/michael/blog_logo.png”;
String targerPath = “d:/test/michael/img_mark_icon.jpg”;
String targerPath2 = “d:/test/michael/img_mark_icon_rotate.jpg”;
// 给图片添加水印
ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath);
// 给图片添加水印,水印旋转-45
ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath2,
-45);

}

/*
给图片添加水印
@param iconPath 水印图片路径
@param srcImgPath 源图片路径
@param targerPath 目标图片路径
/
public static void markImageByIcon(String iconPath, String srcImgPath,
String targerPath) {
markImageByIcon(iconPath, srcImgPath, targerPath, null);
}

/*
给图片添加水印、可设置水印图片旋转角度
@param iconPath 水印图片路径
@param srcImgPath 源图片路径
@param targerPath 目标图片路径
@param degree 水印图片旋转角度
*/
public static void markImageByIcon(String iconPath, String srcImgPath,
String targerPath, Integer degree) {
OutputStream os = null;
try {
Image srcImg = ImageIO.read(new File(srcImgPath));

BufferedImage buffImg = new&
4000
nbsp;BufferedImage(srcImg.getWidth(null),
srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);

// 得到画笔对象
// Graphics g= buffImg.getGraphics();

Graphics2D g = buffImg.createGraphics();

// 设置对线段的锯齿状边缘处理
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);

g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg
.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);

if (null != degree) {
// 设置水印旋转
g.rotate(Math.toRadians(degree),
(double) buffImg.getWidth() / 2, (double) buffImg
.getHeight() / 2);
}

// 水印图象的路径 水印一般为gif或者png的，这样可设置透明度

ImageIcon imgIcon = new ImageIcon(iconPath);

// 得到Image对象。
Image img = imgIcon.getImage();

float alpha = 0.5f; // 透明度

g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
alpha));

// 表示水印图片的位置
g.drawImage(img, 150, 300, null);

g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));

g.dispose();

os = new FileOutputStream(targerPath);

// 生成图片
ImageIO.write(buffImg, “JPG”, os);

System.out.println(“图片完成添加Icon印章。。。。。。”);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (null != os)
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}

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