package com.cjbdi.util; import java.awt.AlphaComposite; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.net.HttpURLConnection; import java.net.URL; import javax.imageio.ImageIO; /** * 该类实现了图片的合并功能，可以选择水平合并或者垂直合并。 * 当然此例只是针对两个图片的合并，如果想要实现多个图片的合并，只需要自己实现方法 BufferedImage * mergeImage(BufferedImage[] imgs, boolean isHorizontal)即可； * 而且这个方法更加具有通用性，但是时间原因不实现了，方法和两张图片实现是一样的 */ public class ImageMerge { /** * @param fileUrl 文件绝对路径或相对路径 * @return 读取到的缓存图像 * @throws IOException 路径错误或者不存在该文件时抛出IO异常 */ public static BufferedImage getBufferedImage(String fileUrl) throws IOException { File f = new File(fileUrl); return ImageIO.read(f); } /** * 远程图片转BufferedImage * * @param destUrl 远程图片地址 * @return */ public static BufferedImage getBufferedImageDestUrl(String destUrl) { HttpURLConnection conn = null; BufferedImage image = null; try { URL url = new URL(destUrl); conn = (HttpURLConnection) url.openConnection(); if (conn.getResponseCode() == 200) { image = ImageIO.read(conn.getInputStream()); return image; } } catch (Exception e) { e.printStackTrace(); } finally { conn.disconnect(); } return image; } /** * 输出图片 * * @param buffImg 图像拼接叠加之后的BufferedImage对象 * @param savePath 图像拼接叠加之后的保存路径 */ public static void generateSaveFile(BufferedImage buffImg, String savePath) { int temp = savePath.lastIndexOf(".") + 1; try { File outFile = new File(savePath); if (!outFile.exists()) { outFile.createNewFile(); } ImageIO.write(buffImg, savePath.substring(temp), outFile); System.out.println("ImageIO write..."); } catch (IOException e) { e.printStackTrace(); } } /** * @param buffImg 源文件(BufferedImage) * @param waterFile 水印文件(BufferedImage) * @param x 距离右下角的X偏移量 * @param y 距离右下角的Y偏移量 * @param alpha 透明度, 选择值从0.0~1.0: 完全透明~完全不透明 * @return BufferedImage * @throws IOException * @Title: 构造图片 * @Description: 生成水印并返回java.awt.image.BufferedImage */ public static BufferedImage overlyingImage(BufferedImage buffImg, BufferedImage waterImg, int x, int y, float alpha) throws IOException { // 创建Graphics2D对象，用在底图对象上绘图 Graphics2D g2d = buffImg.createGraphics(); int waterImgWidth = waterImg.getWidth();// 获取层图的宽度 int waterImgHeight = waterImg.getHeight();// 获取层图的高度 // 在图形和图像中实现混合和透明效果 g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); // 绘制 g2d.drawImage(waterImg, x, y, waterImgWidth, waterImgHeight, null); g2d.dispose();// 释放图形上下文使用的系统资源 return buffImg; } /** * 待合并的两张图必须满足这样的前提，如果水平方向合并，则高度必须相等；如果是垂直方向合并，宽度必须相等。 * mergeImage方法不做判断，自己判断。 * * @param img1 待合并的第一张图 * @param img2 带合并的第二张图 * @param isHorizontal 为true时表示水平方向合并，为false时表示垂直方向合并 * @return 返回合并后的BufferedImage对象 * @throws IOException */ public static BufferedImage mergeImage(BufferedImage img1, BufferedImage img2, boolean isHorizontal) throws IOException { int w1 = img1.getWidth(); int h1 = img1.getHeight(); int w2 = img2.getWidth(); int h2 = img2.getHeight(); // 从图片中读取RGB int[] ImageArrayOne = new int[w1 * h1]; ImageArrayOne = img1.getRGB(0, 0, w1, h1, ImageArrayOne, 0, w1); // 逐行扫描图像中各个像素的RGB到数组中 int[] ImageArrayTwo = new int[w2 * h2]; ImageArrayTwo = img2.getRGB(0, 0, w2, h2, ImageArrayTwo, 0, w2); // 生成新图片 BufferedImage DestImage = null; if (isHorizontal) { // 水平方向合并 DestImage = new BufferedImage(w1 + w2, h1, BufferedImage.TYPE_INT_RGB); DestImage.setRGB(0, 0, w1, h1, ImageArrayOne, 0, w1); // 设置上半部分或左半部分的RGB DestImage.setRGB(w1, 0, w2, h2, ImageArrayTwo, 0, w2); } else { // 垂直方向合并 DestImage = new BufferedImage(w1, h1 + h2, BufferedImage.TYPE_INT_RGB); DestImage.setRGB(0, 0, w1, h1, ImageArrayOne, 0, w1); // 设置上半部分或左半部分的RGB DestImage.setRGB(0, h1, w2, h2, ImageArrayTwo, 0, w2); // 设置下半部分的RGB } return DestImage; } /** * Java 测试图片叠加方法 */ public static void overlyingImageTest(String fromImage1, int fromImage2) { String sourceFilePath = "/Users/gaotengfei/Library/Containers/com.tencent.xinWeChat/Data/Library/Application Support/com.tencent.xinWeChat/2.0b4.0.9/03f04497b9d216597c344638d77c156e/Message/MessageTemp/10944c44d02a8bab9912282f7a619448/File/1-1/" + fromImage1 + ".png"; System.out.println(sourceFilePath); String waterFilePath = "/Users/gaotengfei/Library/Containers/com.tencent.xinWeChat/Data/Library/Application Support/com.tencent.xinWeChat/2.0b4.0.9/03f04497b9d216597c344638d77c156e/Message/MessageTemp/10944c44d02a8bab9912282f7a619448/File/1-1/1-" + fromImage2 + ".png"; String saveFilePath = "/Users/gaotengfei/Library/Containers/com.tencent.xinWeChat/Data/Library/Application Support/com.tencent.xinWeChat/2.0b4.0.9/03f04497b9d216597c344638d77c156e/Message/MessageTemp/10944c44d02a8bab9912282f7a619448/File/1-1/new-1.png"; try { BufferedImage bufferImage1 = getBufferedImage(sourceFilePath); BufferedImage bufferImage2 = getBufferedImage(waterFilePath); // 构建叠加层 BufferedImage buffImg = overlyingImage(bufferImage1, bufferImage2, 0, 0, 1.0f); // 输出水印图片 generateSaveFile(buffImg, saveFilePath); } catch (IOException e) { e.printStackTrace(); } } /** * Java 测试图片合并方法 */ public static void imageMargeTest() { // 读取待合并的文件 BufferedImage bi1 = null; BufferedImage bi2 = null; // 调用mergeImage方法获得合并后的图像 BufferedImage destImg = null; System.out.println("下面是垂直合并的情况："); String saveFilePath = "/Users/gaotengfei/Library/Containers/com.tencent.xinWeChat/Data/Library/Application Support/com.tencent.xinWeChat/2.0b4.0.9/03f04497b9d216597c344638d77c156e/Message/MessageTemp/10944c44d02a8bab9912282f7a619448/File/1-1/1-1.png"; String divingPath = "/Users/gaotengfei/Library/Containers/com.tencent.xinWeChat/Data/Library/Application Support/com.tencent.xinWeChat/2.0b4.0.9/03f04497b9d216597c344638d77c156e/Message/MessageTemp/10944c44d02a8bab9912282f7a619448/File/1-1/1-2.png"; String margeImagePath = "/Users/gaotengfei/Library/Containers/com.tencent.xinWeChat/Data/Library/Application Support/com.tencent.xinWeChat/2.0b4.0.9/03f04497b9d216597c344638d77c156e/Message/MessageTemp/10944c44d02a8bab9912282f7a619448/File/1-1/margeNew.png"; try { bi1 = getBufferedImage(saveFilePath); bi2 = getBufferedImage(divingPath); // 调用mergeImage方法获得合并后的图像 destImg = mergeImage(bi1, bi2, false); } catch (IOException e) { e.printStackTrace(); } // 保存图像 generateSaveFile(destImg, margeImagePath); System.out.println("垂直合并完毕!"); } public static void main(String[] args) { for (int i = 1; i <= 7; i++) { System.out.println(i); if (i == 1) { overlyingImageTest("1-"+i + "", i + 1 ); } if (i + 2 < 10 && i != 1) { overlyingImageTest("new-1", i + 1 ); } } // //1- // overlyingImageTest( "new-1", 8); } }
效果图
