水印的生成

Dear 丶 2022-08-05 11:17 157阅读 0赞

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.OutputStream;  
import javax.imageio.ImageIO;  
  
  
public class WaterMarkTextTest \{  
  
  
public static void main(String\[\] args) \{  
  
File srcImgFile = new File("D:/test/myblog.png");  
String logoText = "water";  
  
File outputImageFile = new File("D:/test/myblog\_water\_text.jpg");  
  
File outputRotateImageFile = new File("D:/test/myblog\_water\_text\_rotate.jpg");  
  
createWaterMarkByText(srcImgFile, logoText, outputImageFile);  
  
createWaterMarkByText(srcImgFile, logoText, outputRotateImageFile, 45);  
\}  
  
  
public static void createWaterMarkByText(File srcImgFile, String logoText,  
File outputImageFile) \{  
createWaterMarkByText(srcImgFile, logoText, outputImageFile, 0);  
\}  
  
public static void createWaterMarkByText(File srcImgFile, String logoText,  
File outputImageFile, double degree) \{  
  
OutputStream os = null;  
try \{  
Image srcImg = ImageIO.read(srcImgFile);  
  
BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),  
srcImg.getHeight(null), BufferedImage.TYPE\_INT\_RGB);  
  
Graphics2D g = buffImg.createGraphics();  
  
g.setRenderingHint(RenderingHints.KEY\_INTERPOLATION,  
RenderingHints.VALUE\_INTERPOLATION\_BILINEAR);  
  
g.drawImage(  
srcImg.getScaledInstance(srcImg.getWidth(null),  
srcImg.getHeight(null), Image.SCALE\_SMOOTH), 0, 0,  
null);  
  
if (degree>0) \{  
g.rotate(Math.toRadians(degree),  
(double) buffImg.getWidth() / 2,  
(double) buffImg.getHeight() / 2);  
\}  
  
g.setColor(Color.GREEN);  
  
g.setFont(new Font("宋体", Font.BOLD, 36));  
  
float alpha = 0.8f;  
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC\_ATOP,  
alpha));  
  
g.drawString(logoText, buffImg.getWidth()/5, buffImg.getHeight()/2);  
  
g.dispose();  
  
os = new FileOutputStream(outputImageFile);  
  
// 生成图片  
ImageIO.write(buffImg, "JPG", os);  
  
\} catch (Exception e) \{  
e.printStackTrace();  
\} finally \{  
try \{  
if (null != os)  
os.close();  
\} catch (Exception e) \{  
e.printStackTrace();  
\}  
\}  
\}  
  
\}