Java给图片添加水印

package com.example.demo;

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

import javax.imageio.ImageIO; import javax.swing.ImageIcon; public class shuiyin { public static void main(String[] args) throws IOException { Font font = new Font(“04b_08”, Font.PLAIN, 30);//字体 String sourceImg=“C:\Users\Administrator\Desktop\img\46053511.png”; //源图片地址 String targetImg=“C:\Users\Administrator\Desktop\img\123.jpg”; //新存储的地址 String watermark=“测试水印”;//水印内容 String watermarkUrl=“D:\test\zy.png”; Color color=new Color(255,255,255,128); addWatermark(sourceImg, targetImg,watermark, color,font); markImgMark(watermarkUrl,sourceImg,targetImg); }

/** * 为图片添加图片水印 * @param watermarkUrl 原图 * @param source 水印图片 * @param output 制作完成的图片 * @return * @throws IOException */ public static String markImgMark(String watermarkUrl, String source, String output) throws IOException { String result = "添加图片水印出错"; File file = new File(source); Image img = ImageIO.read(file); int width = img.getWidth(null);//水印宽度 int height = img.getHeight(null);//水印高 BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = bi.createGraphics(); g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); g.drawImage(img.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null); ImageIcon imgIcon = new ImageIcon(watermarkUrl); Image con = imgIcon.getImage(); float clarity = 0.6f;//透明度 g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, clarity)); g.drawImage(con, 10, 10, null);//水印的位置 g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER)); g.dispose(); File sf = new File(output); ImageIO.write(bi, "jpg", sf); // 保存图片 System.out.println("添加图片水印成功"); return result; } /** 设置文字水印 * @param sourceImg 源图片路径 * @param targetImg 保存的图片路径 * @param watermark 水印内容 * @param color 水印颜色 * @param font 水印字体 * @throws IOException */ public static void addWatermark(String sourceImg, String targetImg, String watermark,Color color,Font font) throws IOException { File srcImgFile = new File(sourceImg); Image srcImg = ImageIO.read(srcImgFile); int srcImgWidth = srcImg.getWidth(null); int srcImgHeight = srcImg.getHeight(null); BufferedImage bufImg = new BufferedImage(srcImgWidth, srcImgHeight, BufferedImage.TYPE_INT_RGB); Graphics2D g = bufImg.createGraphics(); g.drawImage(srcImg, 0, 0, srcImgWidth, srcImgHeight, null); g.setColor(color); g.setFont(font); //设置水印的坐标 int x = srcImgWidth - (g.getFontMetrics(g.getFont()).charsWidth(watermark.toCharArray(), 0, watermark.length())+20); int y = srcImgHeight - 25; g.drawString(watermark, x, y); //加水印 g.dispose(); // 输出图片 FileOutputStream outImgStream = new FileOutputStream(targetImg); ImageIO.write(bufImg, "jpg", outImgStream); System.out.println("添加水印完成"); outImgStream.flush(); outImgStream.close(); }

}