JAVA水印

package com.page;

import java.io.File;
import java.io.FileOutputStream;
import javax.imageio.ImageIO;

import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;

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

/**
 * 图片水印
 * waterMark.imgMark(原始文件路径, 水印文件路径);
 * 透明水印，将水印图片设置为透明背景就可以了(png格式)
 */
public class WaterMark {
 public void imgMark(String strOriginalFileName, String strWaterMarkFileName) {
  try {
   // 源文件
   File fileOriginal = new File(strOriginalFileName);
   Image imageOriginal = ImageIO.read(fileOriginal);
   int widthOriginal = imageOriginal.getWidth(null);
   int heightOriginal = imageOriginal.getHeight(null);
   // System.out.println("widthOriginal:" + widthOriginal
   // + "\theightOriginal:" + heightOriginal);

   BufferedImage bufImage = new BufferedImage(widthOriginal,
     heightOriginal, BufferedImage.TYPE_INT_RGB);
   Graphics g = bufImage.createGraphics();
   g.drawImage(imageOriginal, 0, 0, widthOriginal, heightOriginal,
     null);

   // 水印文件
   File fileWaterMark = new File(strWaterMarkFileName);
   Image imageWaterMark = ImageIO.read(fileWaterMark);
   int widthWaterMark = imageWaterMark.getWidth(null);
   int heightWaterMark = imageWaterMark.getHeight(null);
   // System.out.println("widthWaterMark:" + widthWaterMark
   // + "\theightWaterMark:" + heightWaterMark);

   // 水印文件在源文件的右下角
   g.drawImage(imageWaterMark, widthOriginal - widthWaterMark,
     heightOriginal - heightWaterMark, widthWaterMark,
     heightWaterMark, null);
   g.dispose();

   FileOutputStream fos = new FileOutputStream(strOriginalFileName);
   JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(fos);
   encoder.encode(bufImage);
   fos.flush();
   fos.close();
   fos = null;
  } catch (Exception e) {
   e.printStackTrace();
   System.out.println("++WaterMark-Build the watermark fail.");
  }
 }

 // 测试
 public static void main(String[] args) {
  WaterMark waterMark = new WaterMark();
  waterMark.imgMark("d:/t3.jpg", "d:/watermark.png");
 }
}

 

以上代码来自网络