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
packagemichael.io.image;
importjava.awt.AlphaComposite;
importjava.awt.Graphics2D;
importjava.awt.Image;
importjava.awt.RenderingHints;
importjava.awt.image.BufferedImage;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.FileOutputStream;
importjava.io.InputStream;
importjava.io.OutputStream;
importjavax.imageio.ImageIO;
importjavax.swing.ImageIcon;
importcom.sun.image.codec.jpeg.JPEGCodec;
importcom.sun.image.codec.jpeg.JPEGImageDecoder;
importcom.sun.image.codec.jpeg.JPEGImageEncoder;
/**
*图片水印
*@bloghttp://sjsky.iteye.com
*@authorMichael
*/
publicclassImageMarkLogoByIcon{
/**
*@paramargs
*/
publicstaticvoidmain(String[]args){
StringsrcImgPath="d:/test/michael/myblog_01.png";
StringiconPath="d:/test/michael/blog_logo.png";
StringtargerPath="d:/test/michael/img_mark_icon.jpg";
StringtargerPath2="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
*@paramiconPath水印图片路径
*@paramsrcImgPath源图片路径
*@paramtargerPath目标图片路径
*/
publicstaticvoidmarkImageByIcon(StringiconPath,StringsrcImgPath,
StringtargerPath){
markImageByIcon(iconPath,srcImgPath,targerPath,null);
}
/**
*给图片添加水印、可设置水印图片旋转角度
*@paramiconPath水印图片路径
*@paramsrcImgPath源图片路径
*@paramtargerPath目标图片路径
*@paramdegree水印图片旋转角度
*/
publicstaticvoidmarkImageByIcon(StringiconPath,StringsrcImgPath,
StringtargerPath,Integerdegree){
OutputStreamos=null;
try{
ImagesrcImg=ImageIO.read(newFile(srcImgPath));
BufferedImagebuffImg=newBufferedImage(srcImg.getWidth(null),
srcImg.getHeight(null),BufferedImage.TYPE_INT_RGB);
//得到画笔对象
//Graphicsg=buffImg.getGraphics();
Graphics2Dg=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
ImageIconimgIcon=newImageIcon(iconPath);
//得到Image对象。
Imageimg=imgIcon.getImage();
floatalpha=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=newFileOutputStream(targerPath);
//生成图片
ImageIO.write(buffImg,"JPG",os);
System.out.println("图片完成添加Icon印章。。。。。。");
}catch(Exceptione){
e.printStackTrace();
}finally{
try{
if(null!=os)
os.close();
}catch(Exceptione){
e.printStackTrace();
}
}
}
}
再为大家分享一例：
importjava.awt.Color;
importjava.awt.Font;
importjava.awt.Graphics;
importjava.awt.Image;
importjava.awt.image.BufferedImage;
importjava.io.File;
importjava.io.FileOutputStream;
importjavax.imageio.ImageIO;
importcom.sun.image.codec.jpeg.JPEGCodec;
importcom.sun.image.codec.jpeg.JPEGImageEncoder;
publicfinalclassImageUtils{
publicImageUtils(){
}
/**
*publicfinalstaticStringgetPressImgPath(){returnApplicationContext
*.getRealPath("/template/data/util/shuiyin.gif");}
*/
/**
*把图片印刷到图片上
*
*@parampressImg--
*水印文件
*@paramtargetImg--
*目标文件
*@paramx
*--x坐标
*@paramy
*--y坐标
*/
publicfinalstaticvoidpressImage(StringpressImg,StringtargetImg,
intx,inty){
try{
//目标文件
File_file=newFile(targetImg);
Imagesrc=ImageIO.read(_file);
intwideth=src.getWidth(null);
intheight=src.getHeight(null);
BufferedImageimage=newBufferedImage(wideth,height,
BufferedImage.TYPE_INT_RGB);
Graphicsg=image.createGraphics();
g.drawImage(src,0,0,wideth,height,null);
//水印文件
File_filebiao=newFile(pressImg);
Imagesrc_biao=ImageIO.read(_filebiao);
intwideth_biao=src_biao.getWidth(null);
intheight_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();
FileOutputStreamout=newFileOutputStream(targetImg);
JPEGImageEncoderencoder=JPEGCodec.createJPEGEncoder(out);
encoder.encode(image);
out.close();
}catch(Exceptione){
e.printStackTrace();
}
}
/**
*打印文字水印图片
*
*@parampressText
*--文字
*@paramtargetImg--
*目标图片
*@paramfontName--
*字体名
*@paramfontStyle--
*字体样式
*@paramcolor--
*字体颜色
*@paramfontSize--
*字体大小
*@paramx--
*偏移量
*@paramy
*/
publicstaticvoidpressText(StringpressText,StringtargetImg,
StringfontName,intfontStyle,intcolor,intfontSize,intx,
inty){
try{
File_file=newFile(targetImg);
Imagesrc=ImageIO.read(_file);
intwideth=src.getWidth(null);
intheight=src.getHeight(null);
BufferedImageimage=newBufferedImage(wideth,height,
BufferedImage.TYPE_INT_RGB);
Graphicsg=image.createGraphics();
g.drawImage(src,0,0,wideth,height,null);
g.setColor(Color.RED);
g.setFont(newFont(fontName,fontStyle,fontSize));
g.drawString(pressText,wideth-fontSize-x,height-fontSize
/2-y);
g.dispose();
FileOutputStreamout=newFileOutputStream(targetImg);
JPEGImageEncoderencoder=JPEGCodec.createJPEGEncoder(out);
encoder.encode(image);
out.close();
}catch(Exceptione){
System.out.println(e);
}
}
publicstaticvoidmain(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。