Java实现将两张图片合成一张图片，并且实现批量下载
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.net.URL;
public class ImageMerging {
private Font font = new Font("微软雅黑", Font.PLAIN, 46); // 添加字体的属性设置
private Graphics2D g = null;
private int fontsize = 0;
private int x = 0;
private int y = 0;
/**
* 导入本地图片到缓冲区
*/
public BufferedImage loadImageLocal(String imgName) {
try {
return ImageIO.read(new File(imgName));
} catch (IOException e) {
System.out.println(e.getMessage());
}
return null;
}
/**
* 导入网络图片到缓冲区
*/
public BufferedImage loadImageUrl(String imgName) {
try {
URL url = new URL(imgName);
return ImageIO.read(url);
} catch (IOException e) {
System.out.println(e.getMessage());
}
return null;
}
/**
* 生成新图片到本地
*/
public void writeImageLocal(String newImage, BufferedImage img) {
if (newImage != null && img != null) {
try {
File outputfile = new File(newImage);
ImageIO.write(img, "jpg", outputfile);
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
}
/**
* 设定文字的字体等
*/
public void setFont(String fontStyle, int fontSize) {
this.fontsize = fontSize;
this.font = new Font(fontStyle, Font.PLAIN, fontSize);
}
/**
* 修改图片,返回修改后的图片缓冲区（只输出一行文本）
*/
public BufferedImage modifyImage(BufferedImage img, Object content, int x, int y) {
try {
int w = img.getWidth();
int h = img.getHeight();
g = img.createGraphics();
g.setBackground(new Color(255, 255, 255, 0));
g.setColor(Color.WHITE);//设置字体颜色
g.setFont(new Font("微软雅黑", Font.PLAIN, 46));
if (this.font != null)
g.setFont(this.font);
// 验证输出位置的纵坐标和横坐标
if (x >= h || y >= w) {
this.x = h - this.fontsize + 2;
this.y = w;
} else {
this.x = x;
this.y = y;
}
if (content != null) {
g.drawString(content.toString(), this.x, this.y);
}
g.dispose();
} catch (Exception e) {
System.out.println(e.getMessage());
}
return img;
}
/**
* 修改图片,返回修改后的图片缓冲区（输出多个文本段） xory：true表示将内容在一行中输出；false表示将内容多行输出
*/
public BufferedImage modifyImage(BufferedImage img, Object[] contentArr, int x, int y,
boolean xory) {
try {
int w = img.getWidth();
int h = img.getHeight();
g = img.createGraphics();
g.setBackground(Color.WHITE);
g.setColor(Color.RED);
if (this.font != null)
g.setFont(this.font);
// 验证输出位置的纵坐标和横坐标
if (x >= h || y >= w) {
this.x = h - this.fontsize + 2;
this.y = w;
} else {
this.x = x;
this.y = y;
}
if (contentArr != null) {
int arrlen = contentArr.length;
if (xory) {
for (int i = 0; i < arrlen; i++) {
g.drawString(contentArr[i].toString(), this.x, this.y);
this.x += contentArr[i].toString().length() * this.fontsize / 2 + 5;// 重新计算文本输出位置
}
} else {
for (int i = 0; i < arrlen; i++) {
g.drawString(contentArr[i].toString(), this.x, this.y);
this.y += this.fontsize + 2;// 重新计算文本输出位置
}
}
}
g.dispose();
} catch (Exception e) {
System.out.println(e.getMessage());
}
return img;
}
/**
* 修改图片,返回修改后的图片缓冲区（只输出一行文本）
*
* @param img
* @return
*/
public BufferedImage modifyImageYe(BufferedImage img) {
try {
int w = img.getWidth();
int h = img.getHeight();
g = img.createGraphics();
g.setBackground(Color.WHITE);
g.setColor(Color.blue);//设置字体颜色
if (this.font != null)
g.setFont(this.font);
//g.drawString("www.hi.baidu.com?xia_mingjian", w - 85, h - 5);
g.dispose();
} catch (Exception e) {
System.out.println(e.getMessage());
}
return img;
}
public BufferedImage modifyImagetogeter(BufferedImage b, BufferedImage d, int width, int height) {
try {
int w = b.getWidth();
int h = b.getHeight();
g = d.createGraphics();
g.drawImage(b, width, height, w, h, null);
g.dispose();
} catch (Exception e) {
System.out.println(e.getMessage());
}
return d;
}
public static void main(String[] args) {
ImageMerging tt = new ImageMerging();
BufferedImage b = tt.loadImageLocal("E:\\image\\33.png");
BufferedImage d = tt.loadImageLocal("E:\\image\\44.png");
//往图片上写文件
BufferedImage aaaaaaaa = tt.modifyImage(b, "勇衣小吃店", 578, 999);
tt.writeImageLocal("E:\\image\\cc.jpg", tt.modifyImagetogeter(d, aaaaaaaa, 342, 218));
//将多张图片合在一起
System.out.println("success");
}
}
如果想要复用一张背景图片，并且想要每次给背景图片上面添加不同内容，那就需要将复用的背景图片进行拷贝，然后对副本进行拷贝，可以减少IO操作，提高效率。
/**
* BufferedImage拷贝
* @param source
* @return
*/
public BufferedImage copyImage(BufferedImage source) {
BufferedImage copyBufferedImage = new BufferedImage(source.getWidth(), source.getHeight(), source.getType());
Graphics g = copyBufferedImage.getGraphics();
g.drawImage(source, 0, 0, null);
g.dispose();
return copyBufferedImage;
}
/**
* 批量生成照片时，如果背景图片是一个时，对其进行拷贝在修改。
* @param pic ImageMerging 对象
* @param unitName 需要添加的文字，
* @param qRCode 需要合并的图片 这里是二维码
* @param backgroundImage 背景图片
* @return
*/
public BufferedImage qRCodeGeneration(ImageMerging pic, String unitName, BufferedImage qRCode, BufferedImage backgroundImage, FontMetrics fontMetrics) {
//FontMetrics fontMetrics= new JLabel().getFontMetrics(new Font("微软雅黑", Font.PLAIN, 46));
//计算文字的像素宽度 unitName是添加的字体
int strWidth = fontMetrics.stringWidth(unitName);
//拷贝背景图片
BufferedImage copyBufferedImage = copyImage(backgroundImage);
//往拷贝的背景图片上面添加文字，进行居中处理
//1400 是背景图片宽度
//1050 是设计字体距离背景图片顶部的距离
BufferedImage backgroundAndName = pic.modifyImage(copyBufferedImage, unitName, (1400 - strWidth) / 2, 1050);
//将背景图片和二维码合并
BufferedImage bufferedImage = pic.modifyImagetogeter(qRCode, backgroundAndName, 342, 218);
return bufferedImage;
}
实现批量下载，和照片批量生成
public void generateQRCode(@RequestParam(required = false) Long unitId, HttpServletResponse response) throws Exception {
long start = System.currentTimeMillis();
List<DrugUnitInfo> drugUnitList = new ArrayList<>();
if (unitId == null) {
drugUnitList = drugUnitInfoService.list();
} else {
DrugUnitInfo drugUnitInfo = drugUnitInfoService.getById(unitId);
drugUnitList.add(drugUnitInfo);
}
String downloadFilename = "药品二维码";
downloadFilename = URLEncoder.encode(downloadFilename, "UTF-8");
ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());
response.setContentType("application/octet-stream");
response.setHeader("Content-disposition", "attachment; filename=" + downloadFilename + ".zip");
AtomicReference<BufferedImage> encode = new AtomicReference<>();
ImageMerging pic = new ImageMerging();
FontMetrics metrics = new JLabel().getFontMetrics(new Font("微软雅黑", Font.PLAIN, 46));
BufferedImage backgroundImage = pic.loadImageLocal("E:\\image\\33.png");
drugUnitList.forEach(i -> {
if (!StringUtils.isEmpty(i.getUnitNo())) {
try {
encode.set(QRCodeUtil.encode(host + ":" + port + urlPrefix + i.getId(), null, true));
BufferedImage bufferedImage = pic.qRCodeGeneration(pic, i.getUnitName(), encode.get(), backgroundImage, metrics);
zos.putNextEntry(new ZipEntry(i.getUnitName() + ".png"));
ImageIO.write(bufferedImage, "png", zos);
} catch (Exception e) {
e.printStackTrace();
}
}
});
zos.flush();
zos.close();
long end = System.currentTimeMillis();
System.out.println("执行完时间：" + (end - start));
}
完整版ImageMerging
package com.swkj.smart.market.regulation.sysmanage.utils;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.net.URL;
public class ImageMerging {
private Font font = new Font("微软雅黑", Font.PLAIN, 46); // 添加字体的属性设置
private Graphics2D g = null;
private int fontsize = 0;
private int x = 0;
private int y = 0;
/**
* 导入本地图片到缓冲区
*/
public BufferedImage loadImageLocal(String imgName) {
try {
return ImageIO.read(new File(imgName));
} catch (IOException e) {
System.out.println(e.getMessage());
}
return null;
}
/**
* 导入网络图片到缓冲区
*/
public BufferedImage loadImageUrl(String imgName) {
try {
URL url = new URL(imgName);
return ImageIO.read(url);
} catch (IOException e) {
System.out.println(e.getMessage());
}
return null;
}
/**
* 生成新图片到本地
*/
public void writeImageLocal(String newImage, BufferedImage img) {
if (newImage != null && img != null) {
try {
File outputfile = new File(newImage);
ImageIO.write(img, "jpg", outputfile);
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
}
/**
* 设定文字的字体等
*/
public void setFont(String fontStyle, int fontSize) {
this.fontsize = fontSize;
this.font = new Font(fontStyle, Font.PLAIN, fontSize);
}
/**
* 修改图片,返回修改后的图片缓冲区（只输出一行文本）
*/
public BufferedImage modifyImage(BufferedImage img, Object content, int x, int y) {
try {
int w = img.getWidth();
int h = img.getHeight();
g = img.createGraphics();
g.setBackground(new Color(255, 255, 255, 0));
g.setColor(Color.WHITE);//设置字体颜色
g.setFont(new Font("微软雅黑", Font.PLAIN, 46));
if (this.font != null)
g.setFont(this.font);
// 验证输出位置的纵坐标和横坐标
if (x >= h || y >= w) {
this.x = h - this.fontsize + 2;
this.y = w;
} else {
this.x = x;
this.y = y;
}
if (content != null) {
g.drawString(content.toString(), this.x, this.y);
}
g.dispose();
} catch (Exception e) {
System.out.println(e.getMessage());
}
return img;
}
/**
* 修改图片,返回修改后的图片缓冲区（输出多个文本段） xory：true表示将内容在一行中输出；false表示将内容多行输出
*/
public BufferedImage modifyImage(BufferedImage img, Object[] contentArr, int x, int y,
boolean xory) {
try {
int w = img.getWidth();
int h = img.getHeight();
g = img.createGraphics();
g.setBackground(Color.WHITE);
g.setColor(Color.RED);
if (this.font != null)
g.setFont(this.font);
// 验证输出位置的纵坐标和横坐标
if (x >= h || y >= w) {
this.x = h - this.fontsize + 2;
this.y = w;
} else {
this.x = x;
this.y = y;
}
if (contentArr != null) {
int arrlen = contentArr.length;
if (xory) {
for (int i = 0; i < arrlen; i++) {
g.drawString(contentArr[i].toString(), this.x, this.y);
this.x += contentArr[i].toString().length() * this.fontsize / 2 + 5;// 重新计算文本输出位置
}
} else {
for (int i = 0; i < arrlen; i++) {
g.drawString(contentArr[i].toString(), this.x, this.y);
this.y += this.fontsize + 2;// 重新计算文本输出位置
}
}
}
g.dispose();
} catch (Exception e) {
System.out.println(e.getMessage());
}
return img;
}
/**
* 修改图片,返回修改后的图片缓冲区（只输出一行文本）
* @param img
* @return
*/
public BufferedImage modifyImageYe(BufferedImage img) {
try {
int w = img.getWidth();
int h = img.getHeight();
g = img.createGraphics();
g.setBackground(Color.WHITE);
g.setColor(Color.blue);//设置字体颜色
if (this.font != null)
g.setFont(this.font);
//g.drawString("www.hi.baidu.com?xia_mingjian", w - 85, h - 5);
g.dispose();
} catch (Exception e) {
System.out.println(e.getMessage());
}
return img;
}
public BufferedImage modifyImagetogeter(BufferedImage b, BufferedImage d, int width, int height) {
try {
int w = b.getWidth();
int h = b.getHeight();
g = d.createGraphics();
g.drawImage(b, width, height, w, h, null);
g.dispose();
} catch (Exception e) {
System.out.println(e.getMessage());
}
return d;
}
/**
* BufferedImage拷贝
* @param source
* @return
*/
public BufferedImage copyImage(BufferedImage source) {
BufferedImage copyBufferedImage = new BufferedImage(source.getWidth(), source.getHeight(), source.getType());
Graphics g = copyBufferedImage.getGraphics();
g.drawImage(source, 0, 0, null);
g.dispose();
return copyBufferedImage;
}
/**
* 批量生成照片时，如果背景图片是一个时，对其进行拷贝在修改。
* @param pic
* @param unitName
* @param qRCode
* @param backgroundImage
* @param fontMetrics
* @return
*/
public BufferedImage qRCodeGeneration(ImageMerging pic, String unitName, BufferedImage qRCode, BufferedImage backgroundImage, FontMetrics fontMetrics) {
int strWidth = fontMetrics.stringWidth(unitName);
BufferedImage copyBufferedImage = copyImage(backgroundImage);
BufferedImage backgroundAndName = pic.modifyImage(copyBufferedImage, unitName, (1400 - strWidth) / 2, 1050);
BufferedImage bufferedImage = pic.modifyImagetogeter(qRCode, backgroundAndName, 342, 218);
return bufferedImage;
}
public static void main(String[] args) {
ImageMerging tt = new ImageMerging();
BufferedImage b = tt.loadImageLocal("E:\\image\\33.png");
BufferedImage d = tt.loadImageLocal("E:\\image\\44.png");
//往图片上写文件
BufferedImage aaaaaaaa = tt.modifyImage(b, "勇衣小吃店", 578, 999);
tt.writeImageLocal("E:\\image\\cc.jpg", tt.modifyImagetogeter(d, aaaaaaaa, 342, 218));
//将多张图片合在一起
System.out.println("success");
}
}