通过获取用户网络路径地址的 头像.生成一张网络路径的九宫格头像. dir是网络服务器路径
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 .MalformedURLException;import .ProtocolException;import .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 .ssl.HttpsURLConnection;/*** 该类是图片处理类* * @author * */public final class ImageUtil {/** 图片格式：JPG */private static final String PICTRUE_FORMATE_JPG = "jpg";private ImageUtil() {}/*** 生成组合头像* * @param paths* 用户图像* @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>();// 压缩图片所有的图片生成尺寸同意的 为 50x50for (int i = 0; i < paths.size(); i++) {BufferedImage resize2 = ImageUtil.resize2(paths.get(i), 40, 40, true);bufferedImages.add(resize2);}int width = 112; // 这是画板的宽高int height = 112; // 这是画板的高度// BufferedImage.TYPE_INT_RGB可以自己定义可查看APIBufferedImage outImage = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);// 生成画布Graphics g = outImage.getGraphics();Graphics2D g2d = (Graphics2D) g;// 设置背景色g2d.setBackground(new Color(231,231,231));// 通过使用当前绘图表面的背景色进行填充来清除指定的矩形。g2d.clearRect(0, 0, width, height);// 开始拼凑 根据图片的数量判断该生成那种样式的组合头像目前为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);}// 需要改变颜色的话在这里绘上颜色。可能会用到AlphaComposite类}// 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);}/*** 图片缩放* * @param filePath* 图片路径* @param height* 高度* @param width* 宽度* @param bb* 比例不对时是否需要补白*/public static BufferedImage resize2(String filePath, int height, int width,boolean bb) {try {double ratio = 0; // 缩放比例// System.out.println("图片缩放"+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);// 计算比例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);elseg.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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测试
ArrayList<String>picUrls=new ArrayList<>();//1. 根据用户ID 获取用户头像(集合)//获取群主头像String headerPic= userCrowdMapper.getHeaderPic(header);picUrls=userCrowdMapper.userPicUrl(userIds);picUrls.add(headerPic);//当静态资源与应用分离时,可以获取网络资源进行图片合成// boolean flag=ImageUtil.getCombinationOfhead(picUrls,dir,groupId); //当静态资源和应用程序在同一服务器上时,直接从本地磁盘读取文件for (int i = 0; i < picUrls.size(); i++) {String url=picUrls.get(i); //获取当前头像picUrls.set(i, dir+url.replace(urlImg, ""));//设置为网络路径头像}//2 调用工具类 生成九宫格 并保存在已有路径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);}
