java 根据图片文字动态生成图片

妖狐艹你老母 2021-12-12 23:53 515阅读 0赞

今天在做热敏打印机打印二维码，并有文字描述，想到的简单的方法就是根据热敏打印机的纸张宽度和高度，生成对应的图片，如下：

package com.orisdom.utils;
    
    import lombok.extern.slf4j.Slf4j;
    
    import javax.imageio.ImageIO;
    import java.awt.*;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    /**
     * @author chenxiaokang
     * @date 2019/7/8 13:48
     */
    @Slf4j
    public class ImageBuilderUtils {
       
    
        /**
         *  热敏打印机纸张大约宽度（4cm*6cm）
         */
        private static final int width = 151;
        /**
         *  热敏打印机纸张大约高度（4cm*6cm）
         */
        private static final int height = 227;
    
        /**
         *
         * @param code 编码
         * @param path 二维码存放路劲
         * @return 最新图片生成路径
         */
        public static String ImageBuilder(String code,String path) {
       
            //得到图片缓冲区
            FileInputStream fileInputStream = null;
            try {
       
                BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
                File file = new File(path);
                if(!file.exists()){
       
                    throw  new BusinessException("二维码存放地址有误");
                }
                fileInputStream = new FileInputStream(file);
                BufferedImage image2 = ImageIO.read(fileInputStream);
                //得到它的绘制环境(这张图片的笔)
                Graphics2D g2 = (Graphics2D) bi.getGraphics();
                g2.fillRect(0, 0, width, height);
                //设置颜色
                g2.setColor(Color.WHITE);
                // 将图片大小设置为大约4cm*4cm 具体根据纸张大小设定
                g2.drawImage(image2, 10, 85, 135, 135,null);
                g2.drawRect(0, 0, width - 1, height - 1);
                //设置字体:字体、字号、大小
                g2.setFont(new Font("黑体", Font.BOLD, 26));
                //设置背景颜色
                g2.setColor(Color.BLACK);
                //向图片上写字符串
                g2.drawString("东久", 15, 30);
                g2.setFont(new Font("黑体", Font.BOLD, 20));
                g2.drawString("·", 65, 28);
                g2.setFont(new Font("黑体", Font.BOLD, 26));
                g2.drawString("佳能", 83, 30);
                g2.setFont(new Font("黑体", Font.BOLD, 18));
                g2.drawString("iR-ADV C3525", 15, 60);
                g2.setFont(new Font("黑体", Font.ITALIC, 14));
                g2.drawString(code, 30, 80);
                // 图片上传后的路径
                String savePath = "D:/a.jpg";
                ImageIO.write(bi, "JPEG", new FileOutputStream(savePath));
                return savePath;
            }catch (Exception e){
       
                log.error("生成图片错误",e);
                throw new BusinessException("生成图片错误",e);
            }finally {
       
                if(fileInputStream != null){
       
                    try {
       
                        fileInputStream.close();
                    } catch (IOException e) {
       
                        e.printStackTrace();
                    }
                }
            }
        }
    }
    编写测试类

package com.orisdom.utils;
    
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.springframework.boot.test.context.SpringBootTest;
    import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
    
    /**
     * @author chenxiaokang
     * @date 2019/7/8 15:39
     */
    @RunWith(SpringJUnit4ClassRunner.class)
    @SpringBootTest
    public class ImageBuilderUtilsTest {
       
    
        @Test
        public void imageBuilder() {
       
            String path =  ImageBuilderUtils.ImageBuilder("NO.1132323232","D:\\toolschenxiaokang\\qrcode_for_gh_02122d6b2ea8_258.jpg");
            System.out.println(path);
        }
    }

最后生成的图片模板

![1515575-20190708155759340-1633724537.png][]

转载于:https://www.cnblogs.com/xiaokangk/p/11151774.html

[1515575-20190708155759340-1633724537.png]: /images/20211210/caafc23cfde5472c922cd6196f339834.png