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java拼接图片工具类.html
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href="http://zark.xyz/java%E6%8B%BC%E6%8E%A5%E5%9B%BE%E7%89%87%E5%B7%A5%E5%85%B7%E7%B1%BB.html"><span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"><meta itemprop="image" content="/images/avatar.gif"><meta itemprop="name" content="我爱编程"><meta itemprop="description" content="游龙当归海"></span><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="Code changes the world"></span><header class="post-header"><h1 class="post-title" itemprop="name headline">java拼接图片工具类</h1><div class="post-meta"><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-calendar"></i></span> <span class="post-meta-item-text">发表于</span> <time title="创建时间：2021-01-12 16:36:00" itemprop="dateCreated datePublished" datetime="2021-01-12T16:36:00+08:00">2021-01-12</time></span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-calendar-check"></i></span> <span class="post-meta-item-text">更新于</span> <time title="修改时间：2021-01-26 15:18:53" itemprop="dateModified" datetime="2021-01-26T15:18:53+08:00">2021-01-26</time></span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-folder"></i></span> <span class="post-meta-item-text">分类于</span> <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/%E5%B7%A5%E5%85%B7/" itemprop="url" rel="index"><span itemprop="name">工具</span></a></span> ， <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/%E5%B7%A5%E5%85%B7/java/" itemprop="url" rel="index"><span itemprop="name">java</span></a></span></span><span class="post-meta-item" title="阅读次数" id="busuanzi_container_page_pv"><span class="post-meta-item-icon"><i class="fa fa-eye"></i></span> <span class="post-meta-item-text">阅读次数：</span><span id="busuanzi_value_page_pv"></span></span><br><span class="post-meta-item" title="本文字数"><span class="post-meta-item-icon"><i class="far fa-file-word"></i></span> <span class="post-meta-item-text">本文字数：</span> <span>3.6k</span></span><span class="post-meta-item" title="阅读时长"><span class="post-meta-item-icon"><i class="far fa-clock"></i></span> <span class="post-meta-item-text">阅读时长 ≈</span> <span>3 分钟</span></span><div class="post-description">java拼接图片工具类</div></div></header><div class="post-body" itemprop="articleBody"><p>最近有个拼接图片的需求，遂整理了一个java版本的拼接图片工具类，代码如下：</p><pre><code>public class ImageMergeUtil {
/**
* @param multipartFile 截图文件
* @return 读取到的缓存图像
* @throws IOException 不存在该文件时抛出IO异常
*/
public static BufferedImage getBufferedImage(MultipartFile multipartFile)
throws IOException {
return ImageIO.read(multipartFile.getInputStream());
}
/**
* 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();
}
}
/**
*
* @Title: 构造图片
* @Description: 生成水印并返回java.awt.image.BufferedImage
* @param buffImg
* 源文件(BufferedImage)
* @param waterImg
* 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
*/
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;
}
/**
* 合并任数量的图片成一张图片
*
* @param isHorizontal
* true代表水平合并，fasle代表垂直合并
* @param imgs
* 待合并的图片数组
* @return
* @throws IOException
*/
public static BufferedImage mergeImage(boolean isHorizontal, List<MultipartFile> imgs) throws IOException {
// 生成新图片
BufferedImage destImage = null;
// 计算新图片的长和高
int allw = 0, allh = 0, allwMax = 0, allhMax = 0;
// 获取总长、总宽、最长、最宽
for (MultipartFile image : imgs) {
BufferedImage img = getBufferedImage(image);
allw += img.getWidth();
allh += img.getHeight();
if (img.getWidth() > allwMax) {
allwMax = img.getWidth();
}
if (img.getHeight() > allhMax) {
allhMax = img.getHeight();
}
}
// 创建新图片
if (isHorizontal) {
destImage = new BufferedImage(allw, allhMax, BufferedImage.TYPE_INT_RGB);
} else {
destImage = new BufferedImage(allwMax, allh, BufferedImage.TYPE_INT_RGB);
}
// 合并所有子图片到新图片
int wx = 0, wy = 0;
for (MultipartFile image : imgs) {
BufferedImage img = getBufferedImage(image);
int w1 = img.getWidth();
int h1 = img.getHeight();
// 从图片中读取RGB
int[] ImageArrayOne = new int[w1 * h1];
ImageArrayOne = img.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
if (isHorizontal) { // 水平方向合并
destImage.setRGB(wx, 0, w1, h1, ImageArrayOne, 0, w1); // 设置上半部分或左半部分的RGB
} else { // 垂直方向合并
destImage.setRGB(0, wy, w1, h1, ImageArrayOne, 0, w1); // 设置上半部分或左半部分的RGB
}
wx += w1;
wy += h1;
}
return destImage;
}
public static InputStream mergeImageStream(boolean isHorizontal, List<MultipartFile> imgs) throws IOException {
BufferedImage image = mergeImage(isHorizontal,imgs);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ImageIO.write(image,"png", outputStream);
return new ByteArrayInputStream(outputStream.toByteArray());
}
}</code></pre></div><div class="reward-container"><div>精准扶贫点这里！</div><button onclick='var qr=document.getElementById("qr");qr.style.display="none"===qr.style.display?"block":"none"'>打赏</button><div id="qr" style="display:none"><div style="display:inline-block"><img 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