package com.xiaowu.drawwater.demo;

import java.awt.AlphaComposite;

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.OutputStream;

import javax.imageio.ImageIO;

import javax.swing.ImageIcon;

/**

 * 在原图片的基础之上添加水印效果

 *

 *

 *

 * @author WQ

 *

 */

public class ImageMarkLogoByIcon {

    /**

     * @param args

     */

    public static void main(String[] args) {

        String srcImgPath = "D:/Test123/car.png";

        String iconPath = "D:/Test123/deal.png";

        String targerPath = "D:/Test123/img_mark_icon.jpg";

        String targerPath2 = "D:/Test123/img_mark_icon_rotate.jpg";

        // 给图片添加水印

        ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath);

        // 给图片添加水印,水印旋转-45

        ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath2,

                -45);   

    }   

    /**

     * 给图片添加水印

     * @param iconPath 水印图片路径

     * @param srcImgPath 源图片路径

     * @param targerPath 目标图片路径

     */

    public static void markImageByIcon(String iconPath, String srcImgPath,

            String targerPath) {

        markImageByIcon(iconPath, srcImgPath, targerPath, null);

    }   

    /**

     * 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

     */

    public static void markImageByIcon(String iconPath, String srcImgPath,

            String targerPath, Integer degree) {

        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);

            }   

            // 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 = 0.4f; // 透明度

            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,

                    alpha));   

            // 表示水印图片的位置

            g.drawImage(img, 15, 30, 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("图片完成添加Icon印章。。。。。。");

        } catch (Exception e) {

            e.printStackTrace();

        } finally {

            try {

                if (null != os)

                    os.close();

            } catch (Exception e) {

                e.printStackTrace();

            }

        }

    }

}