JAVA给图片添加水印详解编程语言

package com.test; 
 
import org.junit.Test; 
import javax.imageio.ImageIO; 
import java.awt.*; 
import java.awt.image.BufferedImage; 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.InputStream; 
import java.io.OutputStream; 
 
public class JunitImage { 
    @Test 
    public void testImage(){ 
        markImageByText("hello world","D:/1.jpg","D:2.jpg",45,new Color(0,0,0),"JPG"); 
    } 
 
 
    /** 
     * 给图片添加水印文字、可设置水印文字的旋转角度 
     * @param logoText 要写入的文字 
     * @param srcImgPath 源图片路径 
     * @param newImagePath 新图片路径 
     * @param degree 旋转角度 
     * @param color  字体颜色 
     * @param formaName 图片后缀 
     */ 
    public static void markImageByText(String logoText, String srcImgPath,String newImagePath,Integer degree,Color color,String formaName) { 
        InputStream is = null; 
        OutputStream os = null; 
        try { 
            // 1、源图片 
            java.awt.Image srcImg = ImageIO.read(new File(srcImgPath)); 
            BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB); 
            // 2、得到画笔对象 
            Graphics2D g = buffImg.createGraphics(); 
            // 3、设置对线段的锯齿状边缘处理 
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR); 
            g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), java.awt.Image.SCALE_SMOOTH), 0, 0, null); 
            // 4、设置水印旋转 
            if (null != degree) { 
                g.rotate(Math.toRadians(degree),  buffImg.getWidth()/2,buffImg.getHeight() /2); 
            } 
            // 5、设置水印文字颜色 
            g.setColor(color); 
            // 6、设置水印文字Font 
            g.setFont(new java.awt.Font("宋体", java.awt.Font.BOLD, buffImg.getHeight() /2)); 
            // 7、设置水印文字透明度 
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.15f)); 
            // 8、第一参数->设置的内容，后面两个参数->文字在图片上的坐标位置(x,y) 
            g.drawString(logoText,  buffImg.getWidth()/2 , buffImg.getHeight()/2); 
            // 9、释放资源 
            g.dispose(); 
            // 10、生成图片 
            os = new FileOutputStream(newImagePath); 
            ImageIO.write(buffImg, formaName, os); 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } finally { 
            try { 
                if (null != is) 
                    is.close(); 
            } catch (Exception e) { 
                e.printStackTrace(); 
            } 
            try { 
                if (null != os) 
                    os.close(); 
            } catch (Exception e) { 
                e.printStackTrace(); 
            } 
        } 
    } 
 
 
}