- 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();
- }
- }
- }
来源: http://www.phpxs.com/code/1009756/