【Java】图片添加水印及水印文字的操作

添加文字水印

  1 package pers.io;
  2 
  3 import java.awt.Color;
  4 import java.awt.Font;
  5 import java.awt.FontMetrics;
  6 import java.awt.Graphics2D;
  7 import java.awt.RenderingHints;
  8 import java.awt.image.BufferedImage;
  9 import java.io.File;
 10 import java.io.FileOutputStream;
 11 import java.io.IOException;
 12 import java.util.Random;
 13 
 14 import javax.imageio.ImageIO;
 15 
 16 /**
 17  * 水印添加
 18  * 
 19  * @author three
 20  *
 21  */
 22 public class Watermark {
 23 
 24     public static void main(String[] args) {
 25         mark1();
 26         mark2();
 27         mark3();
 28     }
 29 
 30     /**
 31      * 方法（一）
 32      * 系统自带字体
 33      */
 34     public static void mark1() {
 35         try {
 36             BufferedImage src = ImageIO.read(new File("d:/01.jpg"));
 37             Graphics2D g = src.createGraphics();
 38             // 抗锯齿
 39             g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
 40             // 设置字体
 41             Font font = new Font("隶书", Font.BOLD, 30);
 42             g.setFont(font);
 43 
 44             String str = "three 205024319";
 45             int x = 10;
 46             int y = 40;
 47             g.drawString(str, x, y);
 48             g.dispose();
 49 
 50             ImageIO.write(src, "jpg", new FileOutputStream("d:/mark.jpg"));
 51         } catch (IOException e) {
 52             // TODO Auto-generated catch block
 53             e.printStackTrace();
 54         }
 55 
 56     }
 57 
 58     /**
 59      * 方法（二）
 60      * 装载外部字体
 61      */
 62     public static void mark2() {
 63         try {
 64             BufferedImage src = ImageIO.read(new File("d:\\mark.jpg"));
 65             Graphics2D g = src.createGraphics();
 66             g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
 67 
 68             //设置字体，使用下载的字体
 69             Font font = Font.createFont(Font.TRUETYPE_FONT, new File("f:\\download\\font_1.ttf"));
 70             Font ff = font.deriveFont(Font.PLAIN, 30f);
 71             g.setFont(ff);
 72 
 73             String str = "版权所有 205024319";
 74             int x = 10;
 75             int y = 80;
 76             g.drawString(str, x, y);
 77             g.dispose();
 78 
 79             ImageIO.write(src, "jpg", new FileOutputStream("d:\\mark.jpg"));
 80         } catch (Exception e) {
 81             e.printStackTrace();
 82         }
 83     }
 84 
 85     /**
 86      * 字体定位（水印位置）
 87      */
 88     public static void mark3() {
 89         try {
 90             BufferedImage src = ImageIO.read(new File("d:\\01.jpg"));
 91             int iw = src.getWidth();
 92             int ih = src.getHeight();
 93 
 94             Graphics2D g = src.createGraphics();
 95             g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
 96 
 97             Font font = new Font("", Font.ITALIC, 30);
 98             g.setFont(font);
 99 
100             String str = "three 205024319";
101             FontMetrics fm = g.getFontMetrics();
102             int fw = fm.stringWidth(str);
103             int fh = fm.getHeight();
104 
105             // 左上角
106             int x = 0;
107             int y = fh;
108             g.setColor(Color.WHITE);
109             g.drawString(str, x, y);
110 
111             // 右下角
112             x = iw - fw;
113             y = ih;
114             g.drawString(str, x, y);
115 
116             // 中心
117             x = (iw - fw) / 2;
118             y = ih / 2;
119             g.drawString(str, x, y);
120 
121             // 随机位置
122             g.setColor(Color.BLUE);
123             for (int i = 0; i <= 5; i++) {
124                 Random rand = new Random();
125                 x = rand.nextInt(iw - fw);
126                 y = rand.nextInt(ih - fh) + fh;
127                 g.drawString(str, x, y);
128             }
129 
130             g.dispose();
131 
132             ImageIO.write(src, "jpg", new FileOutputStream("d:\\markPlus.jpg"));
133         } catch (IOException e) {
134             e.printStackTrace();
135         }
136 
137     }
138 
139 }

 

 

添加图片水印

 1     /**
 2      * 图片水印
 3      */
 4     public static void imgMark(File file) {
 5         try {
 6             BufferedImage i = ImageIO.read(file);
 7             int iw = i.getWidth();
 8             int ih = i.getHeight();
 9             
10             //选择要添加的logo
11             BufferedImage logo = ImageIO.read(new File("d:\\logo.png"));
12             int lw = logo.getWidth();
13             int lh = logo.getHeight();
14             
15             Graphics2D g = i.createGraphics();
16             //右下角位置
17             g.drawImage(logo, iw-lw-10,ih-lh-10, null);
18             g.dispose();
19             
20             ImageIO.write(i, file.getName().substring(file.getName().lastIndexOf(".")+1), new FileOutputStream(file));
21         } catch (IOException e) {
22             e.printStackTrace();
23         }
24     }

 

posted @ 2020-10-10 20:21  敲代码的阿磊  阅读(269)  评论(0)  编辑  收藏  举报