How to add watermark to pictures using java

This article mainly introduces you to the example of how to add watermark to pictures using Java. The editor thinks it is quite good, so I will share it with you now and give it as a reference. Let’s follow the editor to take a look, I hope it can help everyone.

import javax.imageio.ImageIO;
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;

public class WaterMark {

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

            //设置水印的坐标
            int x = srcImgWidth - getWatermarkLength(waterMarkContent, g) - 10;
            int y = srcImgHeight - 10;
            g.drawString(waterMarkContent, x, y);  //画出水印
            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) {
        Font font = new Font("微软雅黑", Font.PLAIN, 60);                     //水印字体
        String srcImgPath="C://Users//pactera//Desktop//exe/333.jpg"; //源图片地址
        String tarImgPath="C://Users//pactera//Desktop//exe/444.jpg"; //待存储的地址
        String waterMarkContent="图片来源：随手而来";  //水印内容
        Color color=new Color(255,255,255,128);                               //水印图片色彩以及透明度
        new WaterMark().addWaterMark(srcImgPath, tarImgPath,waterMarkContent, color ,font);

    }

}

Effect

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