Java编写(模仿51CTO 给图片加上水印)--原创

代码很简单，没有什么新意！就是利用JDK做的简单绘图和变换！

package com.oracle.day16;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-8-16
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:
   打印生成jpg图片生成文字水印
      JDK2D02
 */
public class TestJdk2D02 {
    public String create(String str,String filePath,
            int width,int height){
        String fileName=System.currentTimeMillis()+".jpg";
        String path=filePath+"/"+fileName;
        File file=new File(path);
        BufferedImage bi=new BufferedImage(width,height,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2=(Graphics2D) bi.getGraphics();
        g2.setColor.WHITE);
         g2.clearRect(0, 0, width, height);
        Font font=new Font("黑体",Font.BOLD,25);
        g2.setFont(font);
        g2.setPaint(Color.RED);
        FontRenderContext context=g2.getFontRenderContext();
        Rectangle2D bounds=font.getStringBounds(str, context);
        double x=(width-bounds.getWidth())/2;
        double y=(height-bounds.getHeight())/2;
        double ascent=-bounds.getY();
        double baseY=y+ascent;
                                      
        g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
                RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        g2.drawString(str, (int)x, (int)baseY);
        try {
            ImageIO.write(bi, "jpg", file);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return file.getPath();
    }
    public static void main(String[] args) {
        TestJdk2D02 t=  new TestJdk2D02();
        System.out.println(t.create("小夜的传说","c:/",500,38));
    }
}

运行之后在您的C盘中可以查看生成图片的水印！

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