java图片添加水印和压缩详解编程语言

[Java]代码    

package net.leebao.core.util; 
 
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.IOException; 
import java.io.InputStream; 
import java.io.OutputStream; 
 
import javax.imageio.ImageIO; 
import javax.swing.ImageIcon; 
 
/** 
 * 图片水印 
 */ 
public class ImageUtil { 
	/** 
	 * @param args 
	 */ 
	public static void main(String[] args) { 
		String srcImgPath = "E:/zhzq/1.png"; 
		String iconPath = "E:/zhzq/2.jpg"; 
		String targerPath = "E:/zhzq/4.png"; 
		// 给图片添加水印 
//		ImageUtil.waterMarkImageByIcon("java水印图片", iconPath, srcImgPath, targerPath, 0, 0, 0, 0.5f); 
		ImageUtil.waterMarkByText("java水印图片", srcImgPath, targerPath, 0, 0, 0, 0.5f); 
		// 给图片添加水印,水印旋转-45 
		//		  
	} 
 
	/** 
	 * 给图片添加水印、可设置水印图片旋转角度 
	 *  
	 * @param iconPath 
	 *            水印图片路径 
	 * @param srcImgPath 
	 *            源图片路径 
	 * @param targerPath 
	 *            目标图片路径 
	 * @param degree 
	 *            水印图片旋转角度 
	 * @param width 
	 *            宽度(与左相比) 
	 * @param height 
	 *            高度(与顶相比) 
	 * @param clarity 
	 *            透明度(小于1的数)越接近0越透明 
	 */ 
	public static void waterMarkImageByIcon(String logoText, String iconPath, String srcImgPath, String targerPath, 
			Integer degree, Integer width, Integer height, float clarity) { 
		OutputStream os = null; 
		try { 
			Image srcImg = ImageIO.read(new File(srcImgPath)); 
			System.out.println("width:" + srcImg.getWidth(null)); 
			System.out.println("height:" + srcImg.getHeight(null)); 
			BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB); 
			// 得到画笔对象 
			Graphics2D g = buffImg.createGraphics(); 
			// 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), Image.SCALE_SMOOTH), 0, 0, null); 
			if (null != degree) { 
				// 设置水印旋转 
				g.rotate(Math.toRadians(degree), (double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2); 
			} 
			// 水印图象的路径 水印一般为gif或者png的，这样可设置透明度 
			ImageIcon imgIcon = new ImageIcon(iconPath); 
			// 得到Image对象。 
			Image img = imgIcon.getImage(); 
			float alpha = clarity; // 透明度 
			g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); 
			// 表示水印图片的位置 
			//			g.drawImage(img, width, height, null); 
			g.drawImage(img, srcImg.getWidth(null) - img.getWidth(null), srcImg.getHeight(null) - img.getHeight(null), null); 
 
			//			g.drawString(logoText, srcImg.getWidth(null) - img.getWidth(null), srcImg.getHeight(null) - img.getHeight(null)); 
 
			g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER)); 
			g.dispose(); 
			os = new FileOutputStream(targerPath); 
			// 生成图片 
			ImageIO.write(buffImg, "JPG", os); 
			System.out.println("添加水印图片完成!"); 
		} catch (Exception e) { 
			e.printStackTrace(); 
		} finally { 
			try { 
				if (null != os) 
					os.close(); 
			} catch (Exception e) { 
				e.printStackTrace(); 
			} 
		} 
	} 
 
	/** 
	 * 给图片添加水印、可设置水印图片旋转角度 
	 *  
	 * @param logoText 
	 *            水印文字 
	 * @param srcImgPath 
	 *            源图片路径 
	 * @param targerPath 
	 *            目标图片路径 
	 * @param degree 
	 *            水印图片旋转角度 
	 * @param width 
	 *            宽度(与左相比) 
	 * @param height 
	 *            高度(与顶相比) 
	 * @param clarity 
	 *            透明度(小于1的数)越接近0越透明 
	 */ 
	public static void waterMarkByText(String logoText, String srcImgPath, String targerPath, Integer degree, Integer width, 
			Integer height, Float clarity) { 
		// 主图片的路径 
		InputStream is = null; 
		OutputStream os = null; 
		try { 
			Image srcImg = ImageIO.read(new File(srcImgPath)); 
			BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB); 
			// 得到画笔对象 
			// Graphics g= buffImg.getGraphics(); 
			Graphics2D g = buffImg.createGraphics(); 
			// 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), Image.SCALE_SMOOTH), 0, 0, null); 
			if (null != degree) { 
				// 设置水印旋转 
				g.rotate(Math.toRadians(degree), (double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2); 
			} 
			// 设置颜色 
			g.setColor(Color.red); 
			// 设置 Font 
			g.setFont(new Font("宋体", Font.BOLD, 30)); 
			float alpha = clarity; 
			g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); 
			// 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, width, height); 
			g.dispose(); 
			os = new FileOutputStream(targerPath); 
			// 生成图片 
			ImageIO.write(buffImg, "JPG", os); 
			System.out.println("添加水印文字完成!"); 
		} 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(); 
			} 
		} 
	} 
 
	/** 
	 * 图片缩放(图片等比例缩放为指定大小，空白部分以白色填充) 
	 *  
	 * @param srcPath 
	 *            源图片路径 
	 * @param destPath 
	 *            缩放后图片路径 
	 */ 
	public static void zoomImage(String srcPath, String destPath, int destHeight, int destWidth) { 
		try { 
			BufferedImage srcBufferedImage = ImageIO.read(new File(srcPath)); 
			int imgWidth = destWidth; 
			int imgHeight = destHeight; 
			int srcWidth = srcBufferedImage.getWidth(); 
			int srcHeight = srcBufferedImage.getHeight(); 
			if (srcHeight >= srcWidth) { 
				imgWidth = (int) Math.round(((destHeight * 1.0 / srcHeight) * srcWidth)); 
			} else { 
				imgHeight = (int) Math.round(((destWidth * 1.0 / srcWidth) * srcHeight)); 
			} 
			BufferedImage destBufferedImage = new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB); 
			Graphics2D graphics2D = destBufferedImage.createGraphics(); 
			graphics2D.setBackground(Color.WHITE); 
			graphics2D.clearRect(0, 0, destWidth, destHeight); 
			graphics2D.drawImage(srcBufferedImage.getScaledInstance(imgWidth, imgHeight, Image.SCALE_SMOOTH), (destWidth / 2) 
					- (imgWidth / 2), (destHeight / 2) - (imgHeight / 2), null); 
			graphics2D.dispose(); 
			ImageIO.write(destBufferedImage, "JPEG", new File(destPath)); 
		} catch (IOException e) { 
			e.printStackTrace(); 
		} 
	} 
}