图片添加水印和压缩代码,Java代码库,德仔网

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【Java】图片添加水印和压缩
作者:shanxi_liyong / 发布于2015/11/12/ 952

	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();
	 }
	 }
	}
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