超市/饭店等收据或者小票的生成代码

package com.chauvet.utils;

import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;

import javax.swing.JLabel;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

/***
 * 生成 80打印机 图片
 * @author WXW
 *
 */
public class CreateImage {

    public static BufferedImage image;

     public static String createImage(String fileLocation) {
     try {
         FileOutputStream fos = new FileOutputStream(fileLocation);
         BufferedOutputStream bos = new BufferedOutputStream(fos);
         JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);
         encoder.encode(image);
         bos.close();
     } catch (Exception e) {
         e.printStackTrace();
     }
         return fileLocation;
     }

     /***
      * 生成图片
      * @param map
      *          菜品集合，可以为map或者list 根据情况修改
      * @param imgPath
      *          生成的图片存放的路径
      * @return
      *         此处返回的是生成的图片高度，因为掉打印接口的时候需要这个高度
      */
     public static int graphicsGeneration(Map<String,String> map,String imgPath) {
         int x = 10;
         int y = 20;
         int marginY = 30;
         Double price = 20.0;

         createDir(imgPath.substring(0, imgPath.lastIndexOf("/")));//创建目录
         Random ne=new Random();
         int imageWidth = 302;//80打印机能打印的图片的宽度（固定值）       计算公式  打印机宽度（80打印机为800，58打印机为580）/96*25.4
         int imageHeight = 500+map.keySet().size()*40;//图片的高度（500是标题的高度）    根据map/list中的值自动计算
         image = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);
         Graphics graphics = image.getGraphics();
         graphics.setColor(Color.WHITE);
         graphics.fillRect(0, 0, imageWidth, imageHeight);
         graphics.setColor(Color.BLACK);

         /***
          * 标题字体
          */
         Font fontTitle=new Font("黑体",Font.BOLD,22);
         graphics.setFont(fontTitle);
         FontMetrics fm = new JLabel().getFontMetrics(fontTitle);

         String title = "味多美上地店";
         int width = fm.stringWidth(title);
         y = y + marginY;
         int titleMaxLength = 220;
         if(width > titleMaxLength){
             graphics.drawString(title.substring(0, 9), (imageWidth - titleMaxLength) / 2, y);
             y = y + marginY;
             String lastTitle = title.substring(9, title.length());
             int lastLength = fm.stringWidth(lastTitle);
             graphics.drawString(lastTitle, (imageWidth - lastLength) / 2, y);
         }else{
             graphics.drawString(title, (imageWidth - width) / 2, y);
         }

         y = y + marginY;

         String yjd = "预结单";
         int yjdWidth = fm.stringWidth(yjd);
         graphics.drawString(yjd, (imageWidth - yjdWidth) / 2, y);
         y = y + marginY;

         String zh = "桌号:大厅-"+ne.nextInt(10)+1;
         graphics.drawString(zh, x, y);
         y = y + marginY;

         String ddbm = "订单编码:"+ne.nextInt(9999-1000+1);
         graphics.drawString(ddbm, x, y);
         y = y + marginY;

         Font font=new Font("宋体",Font.PLAIN,16);
         fm = new JLabel().getFontMetrics(font);
         graphics.setFont(font);
         graphics.drawString("订单号:"+new SimpleDateFormat("yyyyMMddHHmmss").format(new Date())+System.currentTimeMillis(), x, y);
         y = y + marginY;
         graphics.drawString("操作人:Husky", x, y);
         y = y + marginY;
         graphics.drawString("订单时间:" + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()), x, y);
         y = y + marginY;
         graphics.drawString("支付状态:未支付", x, y);

         y = y + 15;
         graphics.drawString("-----------------------------------", x, y);
         y = y + 15;
         graphics.drawString("品名", x, y);
         graphics.drawString("单价 * 数量", 140, y);
         graphics.drawString("金额", imageWidth-(x+40), y);
         y = y + 15;
         graphics.drawString("-----------------------------------", x, y);
         int cpWidth = 0;
         Double allMoney = 0D;
         for(String str : map.keySet()){
             y = y + marginY;
             String cp = str;
             cpWidth = fm.stringWidth(cp);

             if(cpWidth >= 130){

                 String cp1 = cp.substring(0, 7);
                 graphics.drawString(cp1, x, y);
                 String cp2 = cp.substring(7, cp.length());
                 graphics.drawString(cp2, x, y+20);

             }else{
                 graphics.drawString(cp, x, y);
             }

             graphics.drawString(price+" * "+map.get(str), 140, y);
             Double totalVal = (Double.parseDouble(map.get(str))*price);
             allMoney = allMoney + totalVal;
             graphics.drawString(""+totalVal, imageWidth-(x+40), y);    

             if(cpWidth >= 130){
                 y = y + marginY;
             }
         }

         y = y + marginY;
         if(cpWidth >= 130){
             y = y + 15;
         }
         graphics.drawString("-----------------------------------", x, y);
         y = y + 15;
         DecimalFormat    df   = new DecimalFormat("######0.00");
         graphics.drawString("消费合计", x, y);
         graphics.drawString(""+map.keySet().size(), 140, y);
         graphics.drawString(df.format(allMoney), imageWidth-(x+60), y);
         y = y + 15;
         graphics.drawString("-----------------------------------", x, y);
         y = y + marginY;

         String totalMoney = "总金额:"+df.format(allMoney);
         int mWith = fm.stringWidth(totalMoney);
         graphics.drawString(totalMoney, imageWidth-(mWith+20), y);
         y = y + marginY;

         graphics.setFont(fontTitle);
         String ysje = "应收金额："+df.format(allMoney);
         int ysWidth = fm.stringWidth(ysje);
         graphics.drawString(ysje, imageWidth-(ysWidth+x+60), y);
         BufferedImage bimg = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);
         graphics.drawImage(bimg, imageWidth, 0, null);
         graphics.dispose();
         String  imageUrl = createImage(imgPath);
         int height = (int) (imageHeight/96*25.4);
         return height;//返回生成的图片高度或者地址
     }

     /**
      * 创建图片存放目录
      * 如果目录不存在   创建
      * @param destDirName
      * @return
      */
     public static boolean createDir(String destDirName) {
         File dir = new File(destDirName);
         if(dir.exists()) {
              System.out.println("创建目录" + destDirName + "失败，目标目录已存在！");
              return false;
         }
         if(!destDirName.endsWith(File.separator))
          destDirName = destDirName + File.separator;
         // 创建单个目录
         if(dir.mkdirs()) {
          System.out.println("创建目录" + destDirName + "成功！");
          return true;
         } else {
          System.out.println("创建目录" + destDirName + "成功！");
          return false;
         }
     }

    public static void main(String[] args) {

        Map<String,String> map = new HashMap<String, String>();
        map.put("番茄鸡蛋", "1");
        map.put("蒜苔腊肉", "2");
        map.put("农家小炒肉", "3");
        map.put("干锅辣子鸡炒芹菜炖豆腐", "4");
//        map.put("番茄鸡蛋1", "5");
//        map.put("蒜苔腊肉2", "6");
//        map.put("农家小炒肉3", "7");

        CreateImage.graphicsGeneration(map,"D:/123/1.jpg");
    }
}