Java 生成微信群頭像 九宮格頭像
阿新 • • 發佈：2019-02-13
通過獲取使用者網路路徑地址的 頭像.生成一張網路路徑的九宮格頭像. dir是網路伺服器路徑import java.awt.AlphaComposite; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Image; import java.awt.geom.AffineTransform; import java.awt.image.AffineTransformOp; import java.awt.image.BufferedImage; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.net.MalformedURLException; import java.net.ProtocolException; import java.net.URL; import java.security.KeyManagementException; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.util.ArrayList; import java.util.List; import java.util.UUID; import javax.imageio.ImageIO; import javax.net.ssl.HttpsURLConnection; /** * 該類是圖片處理類 * * @author * */ public final class ImageUtil { /** 圖片格式：JPG */ private static final String PICTRUE_FORMATE_JPG = "jpg"; private ImageUtil() { } /** * 生成組合頭像 * * @param paths * 使用者影象 * @param dir * @param groupId * @return * @throws IOException */ public static boolean getCombinationOfhead(List<String> paths, String dir, String groupId) throws IOException { List<BufferedImage> bufferedImages = new ArrayList<BufferedImage>(); // 壓縮圖片所有的圖片生成尺寸同意的 為 50x50 for (int i = 0; i < paths.size(); i++) { BufferedImage resize2 = ImageUtil.resize2(paths.get(i), 40, 40, true); bufferedImages.add(resize2); } int width = 112; // 這是畫板的寬高 int height = 112; // 這是畫板的高度 // BufferedImage.TYPE_INT_RGB可以自己定義可檢視API BufferedImage outImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); // 生成畫布 Graphics g = outImage.getGraphics(); Graphics2D g2d = (Graphics2D) g; // 設定背景色 g2d.setBackground(new Color(231,231,231)); // 通過使用當前繪圖表面的背景色進行填充來清除指定的矩形。 g2d.clearRect(0, 0, width, height); // 開始拼湊 根據圖片的數量判斷該生成那種樣式的組合頭像目前為4中 int j = 1; for (int i = 1; i <= bufferedImages.size(); i++) { if (bufferedImages.size()==9) { if (i<=3) { g2d.drawImage(bufferedImages.get(i - 1), 30 * i + 3 * i - 31, 0, null); }else if(i<=6) { g2d.drawImage(bufferedImages.get(i - 1),27 * j + 5 * j - 30, 36, null); j++; }else{ g2d.drawImage(bufferedImages.get(i - 1),27 * j + 5 * j-125, 77, null); j++; } } else if (bufferedImages.size()== 8) { if (i<=3) { g2d.drawImage(bufferedImages.get(i - 1), 30 * i + 3 * i - 31, 0, null); }else if(i<=6) { g2d.drawImage(bufferedImages.get(i - 1),27 * j + 5 * j - 30, 36, null); j++; }else{ g2d.drawImage(bufferedImages.get(i - 1),21*j+9*j-100, 77, null); j++; } } else if (bufferedImages.size()== 7) { if (i<=3) { g2d.drawImage(bufferedImages.get(i - 1), 30 * i + 3 * i - 31, 0, null); }else if(i<=6) { g2d.drawImage(bufferedImages.get(i - 1),27 * j + 5 * j - 30, 36, null); j++; }else{ g2d.drawImage(bufferedImages.get(i - 1), 3, 75, null); } } else if (bufferedImages.size()== 6) { if (i<=3) { g2d.drawImage(bufferedImages.get(i - 1), 30 * i + 3 * i - 31, 10, null); }else { g2d.drawImage(bufferedImages.get(i - 1), 31 * j + 4 * j - 33, 60, null); j++; } } else if (bufferedImages.size()== 5) { if (i<=3) { g2d.drawImage(bufferedImages.get(i - 1), 30 * i + 3 * i - 28, 10, null); }else { g2d.drawImage(bufferedImages.get(i - 1), 48 * j + 8 * j - 49, 60, null); j++; } } else if (bufferedImages.size()== 4) { if (i <= 2) { g2d.drawImage(bufferedImages.get(i - 1), 50 * i + 4 * i - 50, 4, null); } else { g2d.drawImage(bufferedImages.get(i - 1), 50 * j + 4 * j - 50, 58, null); j++; } } else if (bufferedImages.size() == 3) { if (i <= 1) { g2d.drawImage(bufferedImages.get(i - 1), 31, 4, null); } else { g2d.drawImage(bufferedImages.get(i - 1), 50 * j + 4 * j - 50, 58, null); j++; } } else if (bufferedImages.size() == 2) { g2d.drawImage(bufferedImages.get(i - 1), 50 * i + 4 * i - 50, 31, null); } else if (bufferedImages.size() == 1) { g2d.drawImage(bufferedImages.get(i - 1), 31, 31, null); } // 需要改變顏色的話在這裡繪上顏色。可能會用到AlphaComposite類 } // new File(dir + "groupPicture" + File.separatorChar // + groupId.substring(0, 4) + File.separatorChar + groupId+".jpg") // String outPath = dir+groupId+".jpg"; StringBuffer outPath = new StringBuffer().append(dir) .append("groupPicture") .append(File.separatorChar) .append(groupId.substring(0, 4)) .append(File.separatorChar) .append(groupId).append(".jpg"); String format = "JPG"; File file = new File(outPath.toString()); if(!file.exists()){ file.mkdirs(); } return ImageIO.write(outImage, format, file); } /** * 圖片縮放 * * @param filePath * 圖片路徑 * @param height * 高度 * @param width * 寬度 * @param bb * 比例不對時是否需要補白 */ public static BufferedImage resize2(String filePath, int height, int width, boolean bb) { try { double ratio = 0; // 縮放比例 // System.out.println("圖片縮放"+filePath); BufferedImage bi =null; if(filePath.indexOf("http://")==0){ bi = ImageIO.read(new URL(filePath)); }else{ bi = ImageIO.read(new File(filePath)); } Image itemp = bi.getScaledInstance(width, height, Image.SCALE_SMOOTH); // 計算比例 if ((bi.getHeight() > height) || (bi.getWidth() > width)) { if (bi.getHeight() > bi.getWidth()) { ratio = (new Integer(height)).doubleValue() / bi.getHeight(); } else { ratio = (new Integer(width)).doubleValue() / bi.getWidth(); } AffineTransformOp op = new AffineTransformOp( AffineTransform.getScaleInstance(ratio, ratio), null); itemp = op.filter(bi, null); } if (bb) { // copyimg(filePath, "D:\\img"); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.setColor(Color.white); g.fillRect(0, 0, width, height); if (width == itemp.getWidth(null)) g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); else g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); g.dispose(); itemp = image; } return (BufferedImage) itemp; } catch (IOException e) { e.printStackTrace(); } return null; } public static StringBuffer httpsRequest(String requestUrl, String dir) throws NoSuchAlgorithmException, NoSuchProviderException, KeyManagementException, MalformedURLException, IOException, ProtocolException, UnsupportedEncodingException { URL url = new URL(requestUrl); InputStream connection1 = url.openStream(); try { byte[] bb=readInputStream(connection1); writeImageToDisk(bb,dir+".jpg"); } catch (Exception e) { e.printStackTrace(); } return null; } public static byte[] readInputStream(InputStream inStream) throws Exception{ ByteArrayOutputStream outStream = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = 0; while( (len=inStream.read(buffer)) != -1 ){ outStream.write(buffer, 0, len); } inStream.close(); return outStream.toByteArray(); } public static void writeImageToDisk(byte[] img, String fileName){ try { File file = new File(fileName); FileOutputStream fops = new FileOutputStream(file); fops.write(img); fops.flush(); fops.close(); } catch (Exception e) { e.printStackTrace(); } } }
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測試
ArrayList<String>picUrls=new ArrayList<>(); //1. 根據使用者ID 獲取使用者頭像(集合) //獲取群主頭像 String headerPic= userCrowdMapper.getHeaderPic(header); picUrls=userCrowdMapper.userPicUrl(userIds); picUrls.add(headerPic); //當靜態資源與應用分離時,可以獲取網路資源進行圖片合成 // boolean flag=ImageUtil.getCombinationOfhead(picUrls,dir,groupId); //當靜態資源和應用程式在同一伺服器上時,直接從本地磁碟讀取檔案 for (int i = 0; i < picUrls.size(); i++) { String url=picUrls.get(i); //獲取當前頭像 picUrls.set(i, dir+url.replace(urlImg, ""));//設定為網路路徑頭像 } //2 呼叫工具類 生成九宮格 並儲存在已有路徑 boolean flag=ImageUtil.getCombinationOfhead(picUrls,dir,groupId); if(flag){ String url=urlImg+new StringBuffer().append("groupPicture/").append(groupId.substring(0, 4)) .append("/").append(groupId).append(".jpg").toString(); crowd.setCrowdPicture(url); }