java添加 img /string 水印

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class WaterImg {
    /** *//**
     * 给图片添加水印
     * 
     * @param filePath
     *            需要添加水印的图片的路径
     * @param markContent
     *            水印的文字
     * @param markContentColor
     *            水印文字的颜色
     * @param qualNum
     *            图片质量
     * @return
     */
    public boolean createMark(String filePath, String markContent,
            Color markContentColor, float qualNum) {
        ImageIcon imgIcon = new ImageIcon(filePath);
        Image theImg = imgIcon.getImage();
        int width = theImg.getWidth(null);
        int height = theImg.getHeight(null);
        BufferedImage bimage = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g = bimage.createGraphics();
        g.setColor(markContentColor);
        g.setBackground(Color.white);
        g.drawImage(theImg, 0, 0, null);
        g.drawString(markContent, width-80, height-80); // 添加水印的文字和设置水印文字出现的内容
        g.dispose();
        try {
        	 /**
             *Encoder是编码器，就是把你画的东东（在内存里是一个Image也是一个OutputStream）按JPEG方式编码，这样你才能存成JPG图片。 
             *Decoder是解码器，就是把你读进来的JPEG的图片转成一般的Stream
             *jdk引入javax.imageio的包之后，上面两个东东就不容易用到了	
             */
        	
            FileOutputStream out = new FileOutputStream(filePath);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
           
            //参数
            JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bimage);
            param.setQuality(qualNum, true);
            //
            encoder.encode(bimage, param);
           
            
            out.close();
        } catch (Exception e) {
            return false;
        }
        return true;
    }
    
    /** *//**
     * 把图片印刷到图片上  g.draw
     * 
     * @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 targetImg,String pressImg) {
        try {
            //源目标文件
            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);

            //press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();
        }
    }


    
    
    public static void main(String[] args){
    	WaterImg water=new WaterImg();
    	//boolean flag=water.createMark("E:/src.jpg","www.test.com",Color.blue,1f);
    	//System.out.println(flag);
    	pressImage("E:/press.jpg","E:/target.jpg");
    }
}