java图片添加水印实例代码分享

java图片添加水印实例代码分享

本文为大家介绍了java图片添加水印实例代码，java实现水印还是非常方便的，水印可以是图片或者文字，具体内容如下

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

* @blog http://sjsky.iteye.com

* @author Michael

*/

public class ImageMarkLogoByIcon {

/**http://

* @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 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。。。。http://。。");

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (null != os)

os.close();

} catch (Exception e) {

e.printStackTrace();

}

}

}

}

再为大家分享一例：

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Image;

import http://java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileOutputStream;

ihttp://mport javax.imageio.ImageIO;

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

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

public final class ImageUtils {

public ImageUtils() {

}

/**

* public final static String getPressImgPath() { return ApplicationContext

* .getRealPath("/template/data/util/shuiyin.gif"); }

*/

/**

* 把图片印刷到图片上

*

* @param pressImg --

* 水印文件

* @param targetImg --

* 目标文件

* @param x

* --x坐标

* @param y

* --y坐标

*/

public final static void pressImage(String pressImg, String targetImg,

int x, int y) {

try {

//目标文件

File _file = new File(targetImg);

Image src = ImageIO.read(_file);

int wideth = src.getWidth(null);

int height = src.getHeight(null);

BufferedImage image = new BufferedImage(wideth, height,

BufferedImage.TYPE_INT_RGB);

Graphics g = image.createGraphics();

g.drawImage(src, 0, 0, wideth, height, null);

//水印文件

File _filebiao = new File(pressImg);

Image src_biao = ImageIO.read(_filebiao);

int wideth_biao = src_biao.getWidth(null);

int height_biao = src_biao.getHeight(null);

g.drawImage(src_biao, (wideth - wideth_biao) / 2,

(height - height_biao) / 2, wideth_biao, height_biao, null);

//水印文件结束

g.dispose();

FileOutputStream out = new FileOutputStream(targetImg);

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

encoder.encode(image);

out.close();

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 打印文字水印图片

*

* @param pressText

* --文字

* @param targetImg --

* 目标图片

* @param fontName --

* 字体名

* @param fontStyle --

* 字体样式

* @param color --

* 字体颜色

* @param fontSize --

* 字体大小

* @param x --

* 偏移量

* @param y

*/

public static void pressText(String pressText, String targetImg,

String fontName, int fontStyle, int color, int fontSize, int x,

int y) {

try {

File _file = new File(targetImg);

Image src = ImageIO.read(_file);

int wideth = src.getWidth(null);

int height = src.getHeight(null);

BufferedImage image = new BufferedImage(wideth, height,

BufferedImage.TYPE_INT_RGB);

Graphics g = image.createGraphics();

g.drawImage(src, 0, 0, wideth, height, null);

g.setColor(Color.RED);

g.setFont(new Font(fontName, fontStyle, fontSize));

g.drawString(pressText, wideth - fontSize - x, height - fontSize

/ 2 - y);

g.dispose();

FileOutputStream out = new FileOutputStream(targetImg);

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

encoder.encode(image);

out.close();

} catch (Exception e) {

System.out.println(e);

}

}

public static void main(String[] args) {

pressImage("F:/logo.png", "F:/123.jpg", 0, 0);

}

}

希望本文所述对大家用java语言实现图片添加水印有所帮助。

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