java做水印 文字 放缩java做水印 文字 放缩

import java.awt.AlphaComposite;   
import java.awt.Color;   
import java.awt.Font;   
import java.awt.Graphics2D;   
import java.awt.Image;   
import java.awt.geom.AffineTransform;   
import java.awt.image.AffineTransformOp;   
import java.awt.image.BufferedImage;   
import java.io.File;   
import java.io.IOException;   
  
import javax.imageio.ImageIO;   
  
/**  
 * @author Eric Xu  
 *  
 */  
public final class ImageUtils {   
    /**  
     * 图片水印  
     * @param pressImg 水印图片  
     * @param targetImg 目标图片  
     * @param x 修正值 默认在中间  
     * @param y 修正值 默认在中间  
     * @param alpha 透明度  
     */  
    public final static void pressImage(String pressImg, String targetImg, int x, int y, float alpha) {   
        try {   
            File img = new File(targetImg);   
            Image src = ImageIO.read(img);