最近做一个微信小应用，最后的保存分享海报页面，需要将海报上面展示当前用户的微信头像，二维码、添加参数等，最终合成一张海报展示，分享使用：
需求原型：
如上图所示：就是在原始海报上叠加上当前登录用户的相关信息等，输出成图片进行展示：
直接上代码：分享图片操作工具类
SharedImageUtils
package com.javen.utils;
import javax.imageio.*;
import javax.imageio.stream.ImageInputStream;
import java.awt.*;
import java.awt.geom.Area;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.util.Iterator;
import static java.lang.System.out;
/**
* @Auther: liux
* @Date: 2019/06/15 15:17
* @Description: 生成朋友圈分享图相关接口
*/
public class SharedImageUtils {
private SharedImageUtils() {
throw new IllegalStateException("Utility class");
}
/* 要放置的二维码寬度 */
public static final int QRCODE_WIDTH = 230;
/* 要放置的二维码長度 */
public static final int QRCODE_LENGTH = 230;
/* 要放置的二维码Y位置 往下为大值，往上为小值 */
public static final int QRCODE_Y = 1070;
/*要放置的二维码X位置 往下为大值，往上为小值 */
public static final int QRCODE_X = 740;
/* 要放置的头像半径 */
public static final int PROFILE_RADIUS = 88;
/* 要放置的头像y坐标 */
public static final int PROFILE_Y = 34;
/* 要放置的头像X坐标 */
public static final int PROFILE_X = 56;
/* 昵称的Y位置 */
public static final int FONT_Y = 1110;
/*昵称的X位置*/
public static final int FONT_X = 190;
/* 推广文案的Y位置 */
public static final int COPYWRITER_Y = 1200;
/* 推广文案的X位置 */
public static final int COPYWRITER_X = 150;
/* 商店图案Y位置 */
public static final int SHOP_PIC_Y = 70;
/*商店图案位置*/
public static final int SHOP_PIC_X = 93;
/* 商店图案寬度 */
public static final int SHOP_PIC_WIDTH = 900;
/* 商店图案長度 */
public static final int SHOP_PIC_LENGTH = 950;
/**
* 裁剪图片
*
* @param img the img
* @param originWidth the origin width
* @param originHeight the origin height
* @return the buffered image
* @throws Exception the exception
*/
public static BufferedImage cutPicture(BufferedImage img, int originWidth, int originHeight) throws IOException {
int width = img.getWidth(); // 原图的宽度
int height = img.getHeight(); //原图的高度
int newImageX = 0; // 要截图的坐标
int newImageY = 0; // 要截图的坐标
if (width > originWidth) {
newImageX = (width - originWidth) / 2;
}
if (height > originHeight) {
newImageY = height - originHeight;
}
return cutJPG(img, newImageX, newImageY, originWidth, originHeight);
}
/**
* 图片拉伸
*
* @param originalImage the original image
* @param originWidth the origin width
* @param originHeight the origin height
* @return the buffered image
* @throws Exception the exception
*/
public static BufferedImage zoomPicture(String originalImage, int originWidth, int originHeight) {
BufferedImage img = null;
BufferedImage bufferedImage = null;
try {
// 原来的图片
img = ImageIO.read(new File(originalImage));
int width = img.getWidth(); // 原图的宽度
int height = img.getHeight(); //原图的高度
int scaledWidth = width;
int scaledHeight = height;
// 如果不是正方形
if (width == height) {
// 按照originHeight进行缩放
scaledWidth = originHeight;
scaledHeight = originHeight;
} else {
if (width > height) {
// 按照originHeight进行缩放
scaledWidth = (scaledWidth * originHeight) / scaledHeight;
scaledHeight = originHeight;
} else {
// 宽高比例
int originPercent = (originHeight * 100) / originWidth;
int newPercent = (height * 100) / width;
if (newPercent >= originPercent) {
// 按照originWidth进行缩放
scaledWidth = originWidth;
scaledHeight = (originHeight * scaledWidth) / scaledWidth;
} else {
// 按照originHeight进行缩放
scaledWidth = (scaledWidth * originHeight) / scaledHeight;
scaledHeight = originHeight;
}
}
}
Image schedImage = img.getScaledInstance(scaledWidth, scaledHeight, Image.SCALE_SMOOTH);
// 新的图片
bufferedImage = new BufferedImage(scaledWidth, scaledHeight, img.getType());
Graphics2D g = bufferedImage.createGraphics();
// 绘制
g.drawImage(schedImage, 0, 0, null);
g.dispose();
} catch (IOException e) {
}
return bufferedImage;
}
/**
* 进行裁剪操作
*
* @param originalImage the original image
* @param x the x
* @param y the y
* @param width the width
* @param height the height
* @return the buffered image
* @throws IOException the io exception
*/
public static BufferedImage cutJPG(BufferedImage originalImage, int x, int y, int width, int height) throws IOException {
Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName("jpg");
ImageReader reader = iterator.next();
// 转换成字节流
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
// writeToJPEG(1080,originalImage,0.5f,outputStream);
ImageIO.write(originalImage, "jpg", outputStream);
InputStream is = new ByteArrayInputStream(outputStream.toByteArray());
ImageInputStream iis = ImageIO.createImageInputStream(is);
reader.setInput(iis, true);
ImageReadParam param = reader.getDefaultReadParam();
Rectangle rect = new Rectangle(x, y, width, height);
param.setSourceRegion(rect);
return reader.read(0, param);
}
/**
* 合并头像和昵称
*
* @param baseLayer
* @param topLayer
* @param nickName
* @param locationX
* @param locationY
* @param locationWidth
* @param locationLength
* @return
* @throws IOException
*/
public static BufferedImage mergePicture(BufferedImage baseLayer,
BufferedImage topLayer,
String nickName,
String eq,
int locationX,
int locationY,
int locationWidth,
int locationLength) throws IOException {
int width = baseLayer.getWidth(null); //底图的宽度
int height = baseLayer.getHeight(null); //底图的高度
// 按照底图的宽高生成新的图片
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = image.createGraphics();
g.drawImage(baseLayer, 0, 0, width, height, null);
//int smallWidth = topLayer.getWidth(null); // 上层图片的宽度
// 设置上层图片放置的位置的坐标及大小
g.drawImage(topLayer, locationX, locationY, locationWidth, locationLength, null);
if (nickName != null) {
// 普通字体(ps:字体是微软雅黑，linux不具备有，需要安装，)
Font font = new Font("微软雅黑", Font.BOLD, 36);
g.setFont(font);
g.setColor(new Color(241, 178, 44));
FontMetrics fm = g.getFontMetrics(font);
// 字体放置的位置
//int textWidth = fm.stringWidth(nickName);
g.drawString(nickName, 497, 240);
}
if (eq != null) {
// 普通字体(ps:字体是微软雅黑，linux不具备有，需要安装，)
Font font = new Font("微软雅黑", Font.BOLD, 36);
g.setFont(font);
g.setColor(new Color(75, 75, 75));
FontMetrics fm = g.getFontMetrics(font);
// 字体放置的位置
//int textWidth = fm.stringWidth(nickName);
g.drawString(eq, 423, 240);
}
g.dispose();
return image;
}
/**
* 按指定的字节数截取字符串（一个中文字符占3个字节，一个英文字符或数字占1个字节）
*
* @param sourceString 源字符串
* @param cutBytes 要截取的字节数
* @return
*/
public static String cutString(String sourceString, int cutBytes) {
if (sourceString == null || "".equals(sourceString.trim())) {
return "";
}
int lastIndex = 0;
boolean stopFlag = false;
int totalBytes = 0;
for (int i = 0; i < sourceString.length(); i++) {
String s = Integer.toBinaryString(sourceString.charAt(i));
if (s.length() > 8) {
totalBytes += 3;
} else {
totalBytes += 1;
}
if (!stopFlag) {
if (totalBytes == cutBytes) {
lastIndex = i;
stopFlag = true;
} else if (totalBytes > cutBytes) {
lastIndex = i - 1;
stopFlag = true;
}
}
}
if (!stopFlag) {
return sourceString;
} else {
return sourceString.substring(0, lastIndex + 1);
}
}
/**
* 合并二维码附带使用说明
*
* @param baseImage
* @param qrcodeBufferImage
* @param text
* @param locationX
* @param locationY
* @param locationWidth
* @param locationLength
* @return
* @throws IOException
*/
public static BufferedImage mergeQrcode(BufferedImage baseImage,
BufferedImage qrcodeBufferImage,
String text,
int locationX,
int locationY,
int locationWidth,
int locationLength) throws IOException {
// BufferedImage qrcodeBufferImage = ImageIO.read(qrcodeFile);
int width = baseImage.getWidth(null); //底图的宽度
int height = baseImage.getHeight(null); //底图的高度
// 按照底图的宽高生成新的图片
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = image.createGraphics();
g.drawImage(baseImage, 0, 0, width, height, null);
// 设置上层图片放置的位置的坐标及大小，坐标居中
g.drawImage(qrcodeBufferImage, locationX, locationY, locationWidth, locationLength, null);
if (text != null) {
// 普通字体
Font font = new Font("微软雅黑", Font.PLAIN, 25);
g.setFont(font);
g.setColor(new Color(129, 129, 129));
FontMetrics fm = g.getFontMetrics(font);
// 字体放置的位置
//int textWidth = fm.stringWidth(nickName);
g.drawString(text, 748, 1330);
}
g.dispose();
return image;
}
/**
* 图片上添加文字
*
* @param src the src
* @param copywriter the copywriter
* @return the buffered image
* @throws Exception the exception
*/
public static BufferedImage drawTextInImage(BufferedImage src, String copywriter) {
int width = src.getWidth(null);
int height = src.getHeight(null);
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.drawImage(src, 0, 0, width, height, null);
// 长度和位置
Font font = new Font("微软雅黑", Font.PLAIN, 35);
g.setFont(font);
FontMetrics fm = g.getFontMetrics(font);
int textWidth = fm.stringWidth(copywriter);
g.setColor(new Color(47, 47, 47));
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// 先按字节来换行，英文单词空格问题暂时未考虑
if (copywriter.getBytes().length > 63) {
String firstLine = cutString(copywriter, 63);
String secondLine = copywriter.substring(firstLine.length(), copywriter.length());
g.drawString(firstLine, (width - fm.stringWidth(firstLine)) / 2, COPYWRITER_Y);
g.drawString(secondLine, (width - fm.stringWidth(secondLine)) / 2, COPYWRITER_Y + 35);
} else {
g.drawString(copywriter, COPYWRITER_X, COPYWRITER_Y);
}
g.dispose();
return image;
}
public static BufferedImage drawTextInImage(BufferedImage src, String copywriter, int x, int y) {
int width = src.getWidth(null);
int height = src.getHeight(null);
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.drawImage(src, 0, 0, width, height, null);
// 长度和位置
Font font = new Font("微软雅黑", Font.PLAIN, 35);
g.setFont(font);
FontMetrics fm = g.getFontMetrics(font);
int textWidth = fm.stringWidth(copywriter);
g.setColor(new Color(62, 62, 62));
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.drawString(copywriter, x, y);
g.dispose();
return image;
}
/**
* 方形转为圆形
*
* @param img the img
* @param radius the radius 半径
* @return the buffered image
* @throws Exception the exception
*/
public static BufferedImage convertRoundedImage(BufferedImage img, int radius) {
BufferedImage result = new BufferedImage(radius, radius, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = result.createGraphics();
//在适当的位置画图
g.drawImage(img, (radius - img.getWidth(null)) / 2, (radius - img.getHeight(null)) / 2, null);
//圆角
RoundRectangle2D round = new RoundRectangle2D.Double(0, 0, radius, radius, radius * 2, radius * 2);
Area clear = new Area(new Rectangle(0, 0, radius, radius));
clear.subtract(new Area(round));
g.setComposite(AlphaComposite.Clear);
//抗锯齿
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.fill(clear);
g.dispose();
return result;
}
/**
* 图像等比例缩放
*
* @param img the img
* @param maxSize the max size
* @param type the type
* @return the scaled image
*/
private static BufferedImage getScaledImage(BufferedImage img, int maxSize, int type) {
int w0 = img.getWidth();
int h0 = img.getHeight();
int w = w0;
int h = h0;
// 头像如果是长方形：
// 1:高度与宽度的最大值为maxSize进行等比缩放,
// 2:高度与宽度的最小值为maxSize进行等比缩放
if (type == 1) {
w = w0 > h0 ? maxSize : (maxSize * w0 / h0);
h = w0 > h0 ? (maxSize * h0 / w0) : maxSize;
} else if (type == 2) {
w = w0 > h0 ? (maxSize * w0 / h0) : maxSize;
h = w0 > h0 ? maxSize : (maxSize * h0 / w0);
}
Image schedImage = img.getScaledInstance(w, h, Image.SCALE_SMOOTH);
BufferedImage bufferedImage = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = bufferedImage.createGraphics();
g.drawImage(schedImage, 0, 0, null);
return bufferedImage;
}
/**
* 对头像处理
*
* @param in of the image
* @param radius the radius
* @return the buffered image
* @throws Exception the exception
*/
public static BufferedImage createRoundedImage(InputStream in, int radius) {
BufferedImage img = null;
BufferedImage fixedImg = null;
BufferedImage bufferedImage = null;
try {
img = ImageIO.read(in);
// 1. 按原比例缩减
fixedImg = getScaledImage(img, radius, 2);
// 2. 居中裁剪
fixedImg = cutPicture(fixedImg, radius, radius);
// 3. 把正方形生成圆形
bufferedImage = convertRoundedImage(fixedImg, radius);
} catch (IOException e) {
}
return bufferedImage;
}
public static void main(String[] args) {
out.println(Thread.currentThread().getContextClassLoader().getParent().getResource(""));
}
}
调用处理类：（我这里的处理主要是把合成的图片写到了我想要目录下面，实际应用中可以根据你们的需求写到指定目录下或者以输出流的形式返回给页面）
public void imageHandle(){
String openId = getSessionAttr("openId");
try {
String grade = getPara("grade");
String flag = getPara("flag");
if(StringUtils.isBlank(grade)){
renderJson(result.addError("无对应信息！"));
}
if (StrKit.notBlank(openId)) {
Users users = Users.me.findByOpenId(openId);
if (users == null) {
log.error("未找到相关用户信息");
renderJson(result.addError("不存在相关用户信息！"));
return;
}
int gradei = Integer.valueOf(grade);
String imageUrl = "";
if (gradei < 80) {
imageUrl = "0-79.png";
} else if (79 < gradei && gradei < 90) {
imageUrl = "80-89.png";
} else if (89 < gradei && gradei < 100) {
imageUrl = "90-99.png";
} else if (99 < gradei && gradei < 110) {
imageUrl = "100-109.png";
} else if (109 < gradei && gradei < 120) {
imageUrl = "110-119.png";
} else if (119 < gradei && gradei < 130) {
imageUrl = "120-129.png";
} else if (129 < gradei && gradei < 135) {
imageUrl = "130-134.png";
} else if (134 < gradei && gradei < 140) {
imageUrl = "135-139.png";
} else if (139 < gradei && gradei < 145) {
imageUrl = "140-144.png";
} else if (144 < gradei && gradei < 1150) {
imageUrl = "145-149.png";
} else if (149 < gradei && gradei < 160) {
imageUrl = "150-159.png";
}else if (gradei == 160) {
imageUrl = "160.png";
} else if (160 < gradei) {
imageUrl = "160以上_.png";
}
String url = PropKit.get("domain")+ "/wxGame/test/img/" + imageUrl;
InputStream background = new URL(url).openStream();
BufferedImage zoomPicture = ImageIO.read(background);
BufferedImage roundedImage = SharedImageUtils.createRoundedImage(new URL(users.get("headimgurl").toString()).openStream(),
SharedImageUtils.PROFILE_RADIUS);//头像裁剪
BufferedImage profileImage = SharedImageUtils.mergePicture(zoomPicture,
roundedImage, grade," EQ:",
SharedImageUtils.PROFILE_X,
SharedImageUtils.PROFILE_Y,
SharedImageUtils.PROFILE_RADIUS,
SharedImageUtils.PROFILE_RADIUS);
// 5. 生成分享图
/*ServletOutputStream outputStream = getResponse().getOutputStream();*/
String imagesUrl = ProjectPathUtil.getRootPath();
File files = new File(imagesUrl);
files = new File(files.getParent());
//files = new File(files.getParent());
imagesUrl = files.getParent();
String imgName= System.currentTimeMillis()+ new Random().nextInt(10000)+"";
File file = new File(imagesUrl+"/test/",imgName+".jpg");
ImageIO.write(profileImage, "jpg",file );
Map map = new HashMap();
map.put("imgUrl",imgName+".jpg");
/*outputStream.flush();
outputStream.close();*/
result.setData(map);
renderJson(result.addSuccess("获取成功"));
}
}catch (Exception e){
e.printStackTrace();
}
}
意思就是合成图片的全部代码，如有疑问欢迎留言；
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