Java中如何给图片加水印呢?

实现思路:
    借助Graphics对象中
	然后借助其drawImage方法即可添加水印

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 com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;     
import javax.imageio.ImageIO;      
/** 
* 给图片加水印 
*/     
public final class Main {      
     public Main() {      
        
     }  
     /**    
      * 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 width = 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, width, height, null);      
        
             // 水印文件      
             File _filebiao = new File(pressImg);      
             Image src_biao = ImageIO.read(_filebiao);      
             int width_biao = src_biao.getWidth(null);      
             int height_biao = src_biao.getHeight(null);      
             g.drawImage(src_biao, width - width_biao - x, height      
                     - height_biao - y, width_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     
      *             --X偏移量    
      * @param y 
      *             --Y偏移量    
      */     
        
     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 width = 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, width, height, null);      
             g.setColor(Color.RED);      
             g.setFont(new Font(fontName, fontStyle, fontSize));      
        
             g.drawString(pressText,fontSize+x,fontSize      
                      +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:/888.jpg", "D:/999.jpg", 20, 20);      
         pressText("Java265我的最爱", "D:/000.jpg","宋体",15,15,100,60,60);  
     }      
}