Java编写(模仿51CTO 给图片加上水印)--原创

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));
}
}