java 实现图片合成，并添加文字

java 实现图片合成，并添加文字

最近公司一个需要，需要把商品的优惠卷分享链接，生成一个二维码然后和商品主图合成一张，并且在新合成的主图增加商品信息的描述，好了直接看合成后图片的样式

下面我就直接贴代码，首先是Contorller层

/**

* 淘宝二维码，商品主图，合成一张图

*

* @param pictUrl

* @param request

* @param response

* @throws IOException

*/

@RequestMapping("/getTaoBaoqQRCode")

public void getTaoBaoqQRCode(TaoBaoQRCode taoBaoQRCode, HttpServletRequest request,

HttpServletResponse response) throws IOException {

ServletOutputStream os = null;

InputStream buffin = null;

try {

// 二维码

String couponUlr = "https:" + taoBaoQRCode.getCouponShareUrl();// 高额卷分享链接

byte[] imgByte = QrCodeUtil.createQrCode2Bytes(250, 250, couponUlr);

buffin = new ByteArrayInputStream(imgByte);

BufferedImage couponImage = ImageIO.read(buffin);

// 商品主图

String imageUrl = "https:" + taoBaoQRCode.getPictUrl();

URL url = new URL(imageUrl);

BufferedImage picImage = ImageIO.read(url);

BufferedImage modifyImage =

imageHandleUtil.mergeImage(picImage, couponImage, taoBaoQRCode.getTitle(),

taoBaoQRCode.getReservePrice(), taoBaoQRCode.getZkFinalPrice());

response.setContentType("image/jpg");

os = response.getOutputStream();

ImageIO.write(modifyImage, "jpg", os);

os.flush();

} catch (Exception e) {

LOGGER.error("getTaoBaoqQRCode error");

e.printStackTrace();

} finally {

buffin.close();

os.close();

}

}

二维码QrCodeUtil 生成帮助类

public class QrCodeUtil {

private static final int DAFAULT_WIDTH = 360;

private static final int DAFAULT_HEIGHT = 360;

private static final Logger LOGGER = LoggerFactory.getLogger(QrCodeUtil.class);

public static String createQrCode(String text) {

return createQrCode(DAFAULT_WIDTH, DAFAULT_HEIGHT, text);

}

public static String createQrCode(int widht, int height, String text) {

HashMap hints = new HashMap();

hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

try {

byte[] bytes = createQrCode2Bytes(widht, height, text);

String fileName = UUID.randomUUID().toString().replaceAll("-", "") + ".png";

return UpYunClient.upload(fileName, bytes);

} catch (Exception e) {

LOGGER.error("create qrcode error", e);

}

return null;

}

public static byte[] createQrCode2Bytes(String text) {

return createQrCode2Bytes(DAFAULT_WIDTH, DAFAULT_HEIGHT, text);

}

public static byte[] createQrCode2Bytes(int widht, int height, String text) {

HashMap hints = new HashMap();

hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

try {

BitMatrix bitMatrix =

new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, widht, height,

hints);

ByteArrayOutputStream out = new ByteArrayOutputStream();

BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);

ImageIO.write(image, "png", out);

return out.toByteArray();

} catch (Exception e) {

LOGGER.error("create qrcode error", e);

}

return null;

}

/**

* 生成条形码并已字节码形式返回，生成的图片格式为png

*

* @param contents

* @param width

* @param height

* @return

*/

public static byte[] createBarcode2Byte(String contents, int width, int height) {

int codeWidth = 3 + // start guard

(7 * 6) + // left bars

5 + // middle guard

(7 * 6) + // right bars

3; // end guard

codeWidth = Math.max(codeWidth, width);

try {

BitMatrix bitMatrix =

new MultiFormatWriter().encode(contents, BarcodeFormat.CODE_128, codeWidth,

height, null);

BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);

ByteArrayOutputStream out = new ByteArrayOutputStream();

ImageIO.write(image, "png", out);

return out.toByteArray();

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

}

二维码生成我这里用的是谷歌的看下面maven pom.xml 文件

com.google.zxing

core

2.2

com.google.zxing

javase

2.2

合成图片方法如何

package com.qft.campuscircle.common.util;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics2D;

import java.awt.RenderingHints;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.net.URL;

import javax.imageio.ImageIO;

import org.springframework.stereotype.Component;

@Component

public class ImageHandleUtil {

private Font font = null;

private Graphics2D g = null;

/**

* 导入本地图片到缓冲区

*

* @param imgName

* @return

*/

public BufferedImage loadImageLocal(String imgName) {

try {

return ImageIO.read(new File(imgName));

} catch (IOException e) {

e.printStackTrace();

}

return null;

}

/**

* 导入网络图片到缓冲区

*

* @param imgName

* @return

*/

public BufferedImage loadImageUrl(String imgName) {

try {

URL url = new URL(imgName);

return ImageIO.read(url);

} catch (IOException e) {

e.printStackTrace();

}

return null;

}

/**

* 生成新图片到本地

*

* @param newImage

* @param img

*/

public void writeImageLocal(String newImage, BufferedImage img) {

if (newImage != null && img != null) {

try {

// 目录不存在则创建

String dirUrl = newImage.substring(0, newImage.lastIndexOf(File.separator));

File dir = new File(dirUrl);

if (!dir.exists()) {

dir.mkdirs();

}

File outputfile = new File(newImage);

ImageIO.write(img, "png", outputfile);

} catch (IOException e) {

e.printStackTrace();

}

}

}

/**

* 设定文字的字体等

*

* @param fontStyle

* @param fontSize

*/

public void setFont(String name, int style, int fontSize) {

this.font = new Font(name, style, fontSize);

}

/**

* 修改图片,返回修改后的图片缓冲区（只输出一行文本）,图片居中显示

*

* @param img

* @param content

* @param y

* @param color

* @return

*/

public BufferedImage modifyImage(BufferedImage img, Object content, int y, Color color) {

try {

g = img.createGraphics();

g.setBackground(Color.WHITE);

g.setColor(color);// 设置字体颜色

g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);// 抗锯齿

if (this.font != null)

g.setFont(this.font);

int width = img.getWidth();// 图片宽度

if (content != null) {

String str = content.toString();

int strWidth = g.getFontMetrics().stringWidth(str);// 字体宽度

g.drawString(str, (width - strWidth) / 2, y);

}

g.dispose();

} catch (Exception e) {

e.printStackTrace();

}

return img;

}

public BufferedImage modifyImage(BufferedImage img, Object content, int x, int y, Color color) {

try {

g = img.createGraphics();

g.setBackground(Color.WHITE);

g.setColor(color);// 设置字体颜色

g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);// 抗锯齿

if (this.font != null)

g.setFont(this.font);

if (content != null) {

String str = content.toString();

g.drawString(str, x, y);

}

g.dispose();

} catch (Exception e) {

e.printStackTrace();

}

return img;

}

/**

* 将一张图片画在另一张图片上

*

* @param addImage 被添加的图片

* @param sourceImg 源图

* @param x

* @param y

* @param width

* @param height

* @return

*/

public BufferedImage modifyImagetogeter(BufferedImage addImage, BufferedImage sourceImg, int x,

int y) {

int width = addImage.getWidth();

int height = addImage.getHeight();

try {

g = sourceImg.createGraphics();

g.drawImage(addImage, x, y, width, height, null);

g.dispose();

} catch (Exception e) {

e.printStackTrace();

}

return sourceImg;

}

/**

*

* @param img1

* @param img2

* @param title 标题

* @param reservePrice 现价

* @param zkFinalPrice 折扣价

* @return BufferedImage

* @throws IOException

*/

public BufferedImage mergeImage(BufferedImage img1, BufferedImage img2,String title,String reservePrice,String zkFinalPrice)

throws IOException {

Font font = new Font("微软雅黑", Font.BOLD, 20);

int w1 = img1.getWidth();

int h1 = img1.getHeight();

int w2 = img2.getWidth();

int h2 = img2.getHeight();

BufferedImage newImage = new BufferedImage(w1, h2 + h1 + h2/2, BufferedImage.TYPE_INT_RGB);// 新的图

Graphics2D graphics = (Graphics2D) newImage.getGraphics();

graphics.setBackground(Color.WHITE);

graphics.fillRect(0, 0, newImage.getWidth(), newImage.getHeight());

graphics.drawImage(img1, 0, 0, null);

graphics.drawImage(img2, (newImage.getWidth()) / 2 - (w2 / 2), newImage.getHeight() - h2,

null);

graphics.setFont(font);

graphics.setColor(Color.BLACK);

int width = graphics.getFontMetrics(font).stringWidth(title);

int startY = h1 + 30;

if (width > newImage.getWidth()) {

char[] array = title.toCharArray();

StringBuilder sb = new StringBuilder(array[0]);

for (char c : array) {

sb.append(c);

int newWidth = graphics.getFontMetrics(font).stringWidth(sb.toString());

if ((newWidth + 19) >= newImage.getWidth()) {// 准备换行

graphics.drawString(sb.toString(), 0, startY);

startY += 30;

sb.delete(0, sb.length());

}

}

graphics.drawString(sb.toString(), 0, startY);

} else {

graphics.drawString(title, 0, startY);

}

graphics.drawString("现价￥"+reservePrice, 0, startY + 30);

startY += 30;

graphics.drawString("卷后价￥"+zkFinalPrice, 0, startY + 30);

return newImage;

}

}

两个帮助类里面有很多方法没用到，大家只要看几个关键的方法就可以了，TaoBaoQRCode 对象里面的属性我就没列出来了，大家自己根据自己的需求而定

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