java实现图片水印的添加

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;

import javax.imageio.ImageIO;

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

public final class ImageUtils {
public ImageUtils() {

}

/**
    * 把图片印刷到图片上
    *
    * @param pressImg --
    *          水印文件
    * @param targetImg --
    *          目标文件
    * @param x
    * @param y
    */
public final static void pressImage(String pressImg, String targetImg,
         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);

         // 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 - x, height
                   - height_biao - y, wideth_biao, height_biao, null);
         // /
         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);
         // String s="www.qhd.com.cn";
         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("d:/test/22.jpg", "d:/test/11.jpg", 20, 20);
}
}