给图片加水印(JSP)
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)
{
//图片
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);
// 水印图片
ImageIcon imgIcon1=new ImageIcon("f://ee.gif");
Image theImg1 =imgIcon1.getImage();
Graphics2D g=bimage.createGraphics();
g.setColor(markContentColor);
g.setBackground(Color.white);
g.drawImage(theImg, 0, 0, null );
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,1f)); //添加图片水印
g.drawImage(theImg1,0,0,null);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
// g.drawString(markContent,width-200,height-10); //添加水印的文字和设置水印文字出现的内容 和位置
g.dispose();
try{
FileOutputStream out=new FileOutputStream(filePath);
JPEGImageEncoder encoder =JPEGCodec.createJPEGEncoder(out);
encoder.encode(bimage);
out.close();
}catch(Exception e)
{ return false; }
return true;
}
public static void main(String[] args) {
WaterMark wm = new WaterMark();
if (wm.createMark("f://yy.jpg","<h1>[url]http://www.free-120.com[/url]<h1>",Color.RED,80f))
{
System.out.println("添加水印成功!");
}
else
{
System.out.println("添加水印失败!");
}
}
}