java 拼接头像9宫格

java后台拼接9宫格头像和添加水印文字，效果：

参考：https://blog.csdn.net/shichen88/article/details/101293541

1、拼接工具类：

package com.bai.blog.utils.files;import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;/*** 拼接图片 参考：https://blog.csdn.net/shichen88/article/details/101293541* FileName: FileSplitUtil* Create by: 漠天* Date: 2019/12/23*/
public class FileSplitUtil {/*** 合成图片** @param imagePaths    List<String>* @param message       String* @param outPutPath    String* @throws IOException* return String*/public static String overlapImage(List<String> imagePaths, String message, String outPutPath) throws IOException {int withAndHeight = 530;//背景图片的宽高int dividerWithAndHeight = 20;//divider分割空白宽高int sonImageWithAndHeight = 150;//画的子头像图片的宽高int sonImageRadius= 30;//画的子头像的圆角// 设置背景图片大小，自己添加替换图片逻辑
//        BufferedImage backgroundImage = resizeImage(566, 230, ImageIO.read(new File(backgroundPath)));//new一个白色背景板BufferedImage backgroundImage = new BufferedImage(withAndHeight,withAndHeight,BufferedImage.TYPE_INT_ARGB);backgroundImage.getGraphics().setColor(Color.white);backgroundImage.getGraphics().fillRect(0,0,withAndHeight,withAndHeight);backgroundImage.getGraphics().dispose();backgroundImage = setClip(backgroundImage,30);// 初始化有效的图片BufferedImage列表List<BufferedImage> bufferedImageList = new ArrayList<>();for(String imagePath:imagePaths){bufferedImageList.add(setClip(resizeImage(sonImageWithAndHeight, sonImageWithAndHeight, ImageIO.read(new File(imagePath))),sonImageRadius));}// 获取背景画布Graphics2D graphics = backgroundImage.createGraphics();// 在背景图片上添加文字graphics.setColor(Color.blue);graphics.setFont(new Font("宋体", Font.PLAIN, 20));graphics.drawString(message, sonImageWithAndHeight/3, sonImageWithAndHeight/3);// 画出旋转的文字，在指定位置Font font = new Font("宋体", Font.PLAIN, 80);AffineTransform affineTransform = new AffineTransform();affineTransform.rotate(-Math.toRadians(45), 50, 20);Font rotatedFont = font.deriveFont(affineTransform);graphics.setFont(rotatedFont);graphics.drawString(message, sonImageWithAndHeight, withAndHeight-sonImageWithAndHeight);// 在背景图片上添加子图片if(bufferedImageList.size()>0){if(bufferedImageList.size()<2){graphics.drawImage(bufferedImageList.get(0), dividerWithAndHeight, dividerWithAndHeight, withAndHeight-dividerWithAndHeight*2, withAndHeight-dividerWithAndHeight*2, null);}else if(bufferedImageList.size()<3){int newSonWidth =  withAndHeight/2-dividerWithAndHeight*2;int centerPlex =(withAndHeight-newSonWidth)/2;graphics.drawImage(bufferedImageList.get(0), dividerWithAndHeight+dividerWithAndHeight/2, centerPlex, newSonWidth, newSonWidth, null);graphics.drawImage(bufferedImageList.get(1), newSonWidth+dividerWithAndHeight*2+dividerWithAndHeight/2, centerPlex, newSonWidth, newSonWidth, null);}else if(bufferedImageList.size()<10){for(int i=0;i<bufferedImageList.size();i++){if(i<3){//012graphics.drawImage(bufferedImageList.get(i), sonImageWithAndHeight*i+dividerWithAndHeight*i+dividerWithAndHeight, dividerWithAndHeight, sonImageWithAndHeight, sonImageWithAndHeight, null);}else if(i<6){//345graphics.drawImage(bufferedImageList.get(i), sonImageWithAndHeight*(i%3)+dividerWithAndHeight*(i%3)+dividerWithAndHeight, sonImageWithAndHeight+dividerWithAndHeight*2, sonImageWithAndHeight, sonImageWithAndHeight, null);}else if(i<9){//678graphics.drawImage(bufferedImageList.get(i), sonImageWithAndHeight*(i%6)+dividerWithAndHeight*(i%6)+dividerWithAndHeight, sonImageWithAndHeight*2+dividerWithAndHeight*3, sonImageWithAndHeight, sonImageWithAndHeight, null);}}}}graphics.dispose();// 输出新的图片ImageIO.write(backgroundImage, "png", new File(outPutPath));return outPutPath;}/*** 重新设置图片大小** @param width* @param height* @param bufferedImage* @return*/private static BufferedImage resizeImage(int width, int height, BufferedImage bufferedImage) {BufferedImage newBufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);newBufferedImage.getGraphics().drawImage(bufferedImage.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null);return newBufferedImage;}/*** 图片设置圆角 （画白边）* @param srcImage  BufferedImage* @param radius    Int* @param border    Int* @param padding   Int* @return          BufferedImage* @throws IOException*/private static BufferedImage setRadius(BufferedImage srcImage, int radius, int border, int padding) throws IOException{int width = srcImage.getWidth();int height = srcImage.getHeight();int canvasWidth = width + padding * 2;int canvasHeight = height + padding * 2;BufferedImage image = new BufferedImage(canvasWidth, canvasHeight, BufferedImage.TYPE_INT_ARGB);Graphics2D gs = image.createGraphics();gs.setComposite(AlphaComposite.Src);gs.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);gs.setColor(Color.WHITE);gs.fill(new RoundRectangle2D.Float(0, 0, canvasWidth, canvasHeight, radius, radius));gs.setComposite(AlphaComposite.SrcAtop);gs.drawImage(setClip(srcImage, radius), padding, padding, null);if(border !=0){gs.setColor(Color.GRAY);gs.setStroke(new BasicStroke(border));gs.drawRoundRect(padding, padding, canvasWidth - 2 * padding, canvasHeight - 2 * padding, radius, radius);}gs.dispose();return image;}/*** 图片设置圆角* @param srcImage  BufferedImage* @return          BufferedImage* @throws IOException*/private static BufferedImage setRadius(BufferedImage srcImage) throws IOException{int radius = (srcImage.getWidth() + srcImage.getHeight()) / 6;return setRadius(srcImage, radius, 2, 5);}/*** 图片切圆角*  圆角矩形：*  RoundRectangle2D rectRound = new RoundRectangle2D.Double(20,30,130,100,18,15);//左上角是(20，30)，宽是130，高是100，圆角的长轴是18，短轴是15。** @param srcImage  BufferedImage* @param radius    radius* @return          BufferedImage*/private static BufferedImage setClip(BufferedImage srcImage, int radius){int width = srcImage.getWidth();int height = srcImage.getHeight();BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);Graphics2D gs = image.createGraphics();gs.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);gs.setClip(new RoundRectangle2D.Double(0, 0, width, height, radius, radius));gs.drawImage(srcImage, 0, 0, null);gs.dispose();return image;}
}

2、调用：

        List<String> formatFilePath = new ArrayList<>();formatFilePath.add("D:/JavaLibFiles/Files/1.png");formatFilePath.add("D:/JavaLibFiles/Files/2.png");formatFilePath.add("D:/JavaLibFiles/Files/3.png");formatFilePath.add("D:/JavaLibFiles/Files/4.png");formatFilePath.add("D:/JavaLibFiles/Files/5.png");formatFilePath.add("D:/JavaLibFiles/Files/6.png");formatFilePath.add("D:/JavaLibFiles/Files/7.png");String outPutPath = "D:/JavaLibFiles/Files/splitImage.png";String message = "测试拼接信息";String splitResultImagePath = FileSplitUtil.overlapImage(formatFilePath,message,outPutPath);// 结果地址：splitResultImagePath

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