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
