用Java實現給圖片添加文字

package image;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;

import javax.imageio.ImageIO;


public class WaterMarkUtils {

    
    public void addWaterMark(String srcImgPath, String tarImgPath, String waterMarkContent,Color markContentColor,Font font) {

        try {
            // 讀取原圖片信息
            File srcImgFile = new File(srcImgPath);//得到文件
            Image srcImg = ImageIO.read(srcImgFile);//文件轉化為圖片
            int srcImgWidth = srcImg.getWidth(null);//獲取圖片的寬
            int srcImgHeight = srcImg.getHeight(null);//獲取圖片的高
            // 加水印
            BufferedImage bufImg = new BufferedImage(srcImgWidth, srcImgHeight, BufferedImage.TYPE_INT_RGB);
            Graphics2D g = bufImg.createGraphics();
            g.drawImage(srcImg, 0, 0, srcImgWidth, srcImgHeight, null);
            g.setColor(markContentColor); //根據圖片的背景設置水印顏色
            g.setFont(font);              //設置字體

            //設置水印的坐標
            int x = srcImgWidth - 2*getWatermarkLength(waterMarkContent, g);  
            int y = srcImgHeight - 2*getWatermarkLength(waterMarkContent, g);  
            g.drawString(waterMarkContent, x, y);  //畫出水印
            g.dispose();  
            // 輸出圖片  
            FileOutputStream outImgStream = new FileOutputStream(tarImgPath);  
            ImageIO.write(bufImg, "jpg", outImgStream);
            System.out.println("添加水印完成");  
            outImgStream.flush();  
            outImgStream.close();  

        } catch (Exception e) {
            // TODO: handle exception
        }
    }
    public int getWatermarkLength(String waterMarkContent, Graphics2D g) {  
        return g.getFontMetrics(g.getFont()).charsWidth(waterMarkContent.toCharArray(), 0, waterMarkContent.length());  
    }  
    public static void main(String[] args) {
        Font font = new Font("微軟雅黑", Font.PLAIN, 35);                     //水印字體
        String srcImgPath="H:/s.jpg"; //源圖片地址
        String tarImgPath="H:/t.jpg"; //待存儲的地址
        String waterMarkContent="圖片來源：http://blog.csdn.net/zjq_1314520";  //水印內容
        Color color=new Color(255,255,255,128);                               //水印圖片色彩以及透明度
        new WaterMarkUtils().addWaterMark(srcImgPath, tarImgPath, color, waterMarkContent,font);

    }
}