Java实现给图片添加水印

package com.ccniit.url;

import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.swing.*;
import com.sun.image.codec.jpeg.*;

public class WaterMark{
/*
* 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,String watermark)
	{
		ImageIcon imgIcon=new ImageIcon(filePath);
		Image theImg =imgIcon.getImage();
		int width=theImg.getWidth(null);
		int height= theImg.getHeight(null);
		//ImageIcon waterIcon=new ImageIcon(watermark);
		//Image waterImg =waterIcon.getImage();
		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.drawImage(waterImg, width*2, height, null );
		g.drawString(markContent,width-100,height-30); //添加水印的文字和设置水印文字出现的内容
		g.dispose();
		try{
			FileOutputStream out=new FileOutputStream(filePath);
			JPEGImageEncoder encoder =JPEGCodec.createJPEGEncoder(out);
			JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bimage);
			param.setQuality(qualNum, true);
			encoder.encode(bimage, param);
			out.close();
		}
		catch(Exception e)
                { 
                  return false;
                 }
		return true;
	}
public static void main(String arg[])
   {
		WaterMark wk=new WaterMark();
		if(wk.createMark("D:\\1.jpg","Welcome!",Color.WHITE,70f,""))
		{
		  System.out.println("success");
		}
		else
		{
		  System.out.println("wrong！");
		}
	}
}