Java图片添加水印

一、文件夹下所有图片添加水印文字

package day05;
//添加水印文字
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

public class Protice01 {
       public static int num = 0;
    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
           show(new File("D:/QQQ"));
           System.out.println(num);
    }
    public static void show(File file) throws IOException {
        if(file.isDirectory()) {
            File[] fs = file.listFiles();
            for(File f : fs) {
                if(f.isFile()) {
                    if(f.getAbsolutePath().endsWith(".jpg")) {
                        File s = f.getAbsoluteFile();
                        BufferedImage i = ImageIO.read(f);
                           Graphics g = i.getGraphics();
                           g.setColor(Color.RED);
                           String str = "中兴教育";
                           int x = 150;
                           int y = 200;
                           g.drawString(str, x, y);
                           g.dispose();
                           ImageIO.write(i, "jpg", s);
                        //System.out.println(f.getAbsolutePath());
                        num++;                
    }        
    }else {
        show(f);
    }
    }        
  }  
}    
}

二、添加水印图标

package day07;
//添加水印图标
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import javax.imageio.ImageIO;


public class Logo {

    public static void main(String[] args) throws FileNotFoundException, IOException {
        BufferedImage logo =  ImageIO.read(new FileInputStream("D:/QQQ/b.jpg"));
        int lw = logo.getWidth();
        int lh = logo.getHeight();
        BufferedImage src = ImageIO.read(new FileInputStream("D:/QQQ/a.jpg"));
        int sh = src.getHeight();
        int sw = src.getWidth();
        Graphics s = src.getGraphics();    
        //int x = 0;
        //int y = 0;   //左上角
        
        //int x = (sw - lw)/2;
        //int y = 0;   //上中
        
        //int x = (sw - lw)+100;
        //int y = 0;   //右上
        
        int x = 0;
        int y = (sh - lh)/2;
        s.drawImage(logo, x, y, null);
        s.dispose();
        ImageIO.write(src, "jpg", new File("D:/QQQ/a_logo.jpg"));  
    }

}