java实现给图片加文字/水印

package com.editImg;

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;

/**
 * @use 利用Java代码给图片加水印
 */
public class WaterMarkUtils {

    /**
     * @param srcImgPath 源图片路径
     * @param tarImgPath 保存的图片路径
     * @param waterMarkContent 水印内容
     * @param markContentColor 水印颜色
     * @param font 水印字体
     */
    public void addWaterMark(String srcImgPath, String tarImgPath, String waterMarkContent,Color markContentColor,Font font) {

        try {
            // 读取原图片信息
            //得到文件
            File srcImgFile = new File(srcImgPath);
            //文件转化为图片
            Image srcImg = ImageIO.read(srcImgFile);
            //获取图片的宽
            int srcImgWidth = srcImg.getWidth(null);
            //获取图片的高
            int srcImgHeight = srcImg.getHeight(null);
            // 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);
            //根据图片的背景设置水印颜色
            g.setColor(markContentColor);
            //设置字体
            g.setFont(font);

            //设置水印的坐标
//            int x = srcImgWidth - 2*getWatermarkLength(waterMarkContent, g);
//            int y = srcImgHeight - 2*getWatermarkLength(waterMarkContent, g);
            int x = 350;
            int y = 350;
            //画出水印
            g.drawString(waterMarkContent, x, y);
            g.dispose();
            // 输出图片
            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) {
        //水印字体
        Font font = new Font("微软雅黑", Font.PLAIN, 45);
        //源图片地址
        String srcImgPath="F:\nice.jpg";
        //待存储的地址
        String tarImgPath="F:\img\cc.jpg";
        //水印内容
        String waterMarkContent="水印内容。。。。。。。。";
        //水印图片色彩以及 透明度 
        Color color=new Color(0,0,0,255);
        new WaterMarkUtils().addWaterMark(srcImgPath, tarImgPath,waterMarkContent, color,font);

    }
}

原文：www.cnblogs.com/remember-fo…