java.imageIo給圖片添加浮水印的實現代碼

來源:互聯網
上載者:User

複製代碼 代碼如下:package com.blogs.image;
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.InputStream;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
/**
 * 圖片浮水印
 */
public class ImageUtil {
    /**
     * @param args
     */
    public static void main(String[] args) {
        String srcImgPath = "e:/2.png";
        String iconPath = "e:\\logo.jpg";
        String targerPath = "e:/3.jpg";
        // 給圖片添加浮水印
        ImageUtil.waterMarkImageByIcon(iconPath, srcImgPath, targerPath, 0, 0,
, 0.1f);
        // 給圖片添加浮水印,浮水印旋轉-45
        // ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath,
        // targerPath2, -45);
    }
    /**
     * 給圖片添加浮水印、可設定浮水印圖片旋轉角度
     *
     * @param iconPath
     *            浮水印圖片路徑
     * @param srcImgPath
     *            源圖片路徑
     * @param targerPath
     *            靶心圖表片路徑
     * @param degree
     *            浮水印圖片旋轉角度
     * @param width
     *            寬度(與左相比)
     * @param height
     *            高度(與頂相比)
     * @param clarity
     *            透明度(小於1的數)越接近0越透明
     */
    public static void waterMarkImageByIcon(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);
            // 得到畫筆對象
            // Graphics g= buffImg.getGraphics();
            Graphics2D g = buffImg.createGraphics();
            // 設定對線段的鋸齒狀邊緣處理
            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) {
                // 設定浮水印旋轉
                g.rotate(Math.toRadians(degree),
                        (double) buffImg.getWidth() / 2,
                        (double) buffImg.getHeight() / 2);
            }
            // 浮水印圖象的路徑 浮水印一般為gif或者png的,這樣可設定透明度
            ImageIcon imgIcon = new ImageIcon(iconPath);
            // 得到Image對象。
            Image img = imgIcon.getImage();
            float alpha = clarity; // 透明度
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                    alpha));
            // 表示浮水印圖片的位置
            g.drawImage(img, width, height, null);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
            g.dispose();
            os = new FileOutputStream(targerPath);
            // 產生圖片
            ImageIO.write(buffImg, "JPG", os);
            System.out.println("添加浮水印圖片完成!");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != os)
                    os.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    /**
     * 給圖片添加浮水印、可設定浮水印圖片旋轉角度
     *
     * @param logoText
     *            浮水印文字
     * @param srcImgPath
     *            源圖片路徑
     * @param targerPath
     *            靶心圖表片路徑
     * @param degree
     *            浮水印圖片旋轉角度
     * @param width
     *            寬度(與左相比)
     * @param height
     *            高度(與頂相比)
     * @param clarity
     *            透明度(小於1的數)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) {
        // 主圖片的路徑
        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);
            // 得到畫筆對象
            // Graphics g= buffImg.getGraphics();
            Graphics2D g = buffImg.createGraphics();
            // 設定對線段的鋸齒狀邊緣處理
            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) {
                // 設定浮水印旋轉
                g.rotate(Math.toRadians(degree),
                        (double) buffImg.getWidth() / 2,
                        (double) buffImg.getHeight() / 2);
            }
            // 設定顏色
            g.setColor(Color.red);
            // 設定 Font
            g.setFont(new Font("宋體", Font.BOLD, 30));
            float alpha = clarity;
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                    alpha));
            // 第一參數->設定的內容,後面兩個參數->文字在圖片上的座標位置(x,y) .
            g.drawString(logoText, width, height);
            g.dispose();
            os = new FileOutputStream(targerPath);
            // 產生圖片
            ImageIO.write(buffImg, "JPG", os);
            System.out.println("添加浮水印文字完成!");
        } 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();
            }
        }
    }
}

還有一個圖片縮放代碼:複製代碼 代碼如下:/**
     * 圖片縮放(圖片等比例縮放為指定大小,空白部分以白色填充)
     *
     * @param srcPath
     *            源圖片路徑
     * @param destPath
     *            縮放後圖片路徑
     */
    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();
        }
    }

相關文章

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.