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);
}
}