购物小票打印

|作者：RexFang

|出处：http://www.cnblogs.com/rexfang/

|关于作者：Java 程序员一枚

|版权：本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接。如有问题，可以邮件：[e-mail]

　　最近，项目需要为商城做一个购物小票的打印功能，日常我们去超市买东西，结账的时候收银员都会打印一个小票，一般的商城也都需要这样的一个小功能，本文给出的 demo 是在 58mm 的热敏打印机下的例子，如果是其他纸张类型的打印机，调整纸张宽度即可。

package test;import java.awt.*;import java.awt.print.*;/** * 打印机测试类（58mm） * 1、目标打印机必须设置为默认打印机 * 2、打印页面的宽度和具体的打印机有关，一般为打印纸的宽度，需要配置成系统参数 * 3、一个汉字的宽度大概是12点 */public class PrintTest {    public static void main(String[] args){        if(PrinterJob.lookupPrintServices().length>0){            /*                打印格式             */            PageFormat pageFormat = new PageFormat();            //设置打印起点从左上角开始，从左到右，从上到下打印            pageFormat.setOrientation(PageFormat.PORTRAIT);            /*                打印页面格式设置             */            Paper paper = new Paper();            //设置打印宽度（固定，和具体的打印机有关）和高度（跟实际打印内容的多少有关）            paper.setSize(140, 450);            //设置打印区域 打印起点坐标、打印的宽度和高度            paper.setImageableArea(0, 0, 135, 450);            pageFormat.setPaper(paper);            //创建打印文档            Book book = new Book();            book.append(new Printable() {                @Override                public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {                    if(pageIndex>0){                        return NO_SUCH_PAGE;                    }                    Graphics2D graphics2D = (Graphics2D) graphics;                    Font font = new Font("宋体", Font.PLAIN, 5);                    graphics2D.setFont(font);                    drawString(graphics2D, "//////////////////////////////", 10, 17, 119, 8);                    font = new Font("宋体", Font.PLAIN, 7);                    graphics2D.setFont(font);                    int yIndex = 30;                    int lineHeight = 10;                    int lineWidth = 120;                    Color defaultColor = graphics2D.getColor();                    Color grey = new Color(145, 145, 145);                    //收货信息                    yIndex = drawString(graphics2D, "收货人：路人甲", 10, yIndex, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "收货地址：北京市海淀区上地十街10号百度大厦", 10, yIndex + lineHeight, lineWidth, lineHeight);                    //收货信息边框                    Stroke stroke = new BasicStroke(0.5f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL,0,new float[]{4, 4},0);                    graphics2D.setStroke(stroke);                    graphics2D.drawRect(5, 10, 129, yIndex);                    //药店名称                    lineWidth = 129;                    lineHeight = 8;                    graphics2D.setFont(new Font("宋体", Font.BOLD, 8));                    graphics2D.setColor(defaultColor);                    yIndex = drawString(graphics2D, "北京药店零售小票", 5, yIndex + lineHeight + 20, lineWidth, 12);                    graphics2D.setFont(new Font("宋体", Font.PLAIN, 6));                    graphics2D.setColor(grey);                    yIndex = drawString(graphics2D, "操作员：小清新", 5, yIndex + lineHeight + 2, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "日期：2017-01-05", 5 + lineWidth/2, yIndex, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "品名", 5, yIndex + lineHeight * 2 - 5, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "规格", (lineWidth/10)*4, yIndex, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "单价", (lineWidth/10)*8, yIndex, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "数量", (lineWidth/10)*10, yIndex, lineWidth, lineHeight);                    for(int i=0; i<5; i++){                        graphics2D.setFont(new Font("宋体", Font.PLAIN, 7));                        yIndex = drawString(graphics2D, "E复合维生素B片100片E复合维生素B片100片", 5, yIndex + 15, (lineWidth/10)*7, 10);                        graphics2D.setFont(new Font("宋体", Font.PLAIN, 6));                        graphics2D.setColor(grey);                        yIndex = drawString(graphics2D, "100片/盒", 5, yIndex + 11, lineWidth, lineHeight);                        yIndex = drawString(graphics2D, "14.50", (lineWidth/10)*8, yIndex, lineWidth, lineHeight);                        yIndex = drawString(graphics2D, "2", (lineWidth/10)*10, yIndex, lineWidth, lineHeight);                        graphics2D.setFont(new Font("宋体", Font.PLAIN, 7));                        yIndex = yIndex + 2;                        graphics2D.drawLine(5, yIndex, 5 + lineWidth, yIndex);                    }                    graphics2D.setColor(defaultColor);                    yIndex = drawString(graphics2D, "会员名称：小清新", 5, yIndex + lineHeight * 2, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "总    数：6", 5, yIndex + lineHeight, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "总    计：55.30", 5, yIndex + lineHeight, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "收    款：100.00", 5, yIndex + lineHeight, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "找    零：44.70", 5, yIndex + lineHeight, lineWidth, lineHeight);                    graphics2D.setFont(new Font("宋体", Font.PLAIN, 6));                    graphics2D.setColor(grey);                    yIndex = drawString(graphics2D, "电话：[phone]", 5, yIndex + lineHeight * 2, lineWidth, lineHeight);                    yIndex = drawString(graphics2D, "地址：北京市海淀区上地十街10号百度大厦", 5, yIndex + lineHeight, lineWidth, lineHeight);                    yIndex = yIndex + 20;                    graphics2D.drawLine(0, yIndex, 140, yIndex);                    return PAGE_EXISTS;                }            }, pageFormat);            //获取默认打印机            PrinterJob printerJob = PrinterJob.getPrinterJob();            printerJob.setPageable(book);            try {                printerJob.print();            } catch (PrinterException e) {                e.printStackTrace();                System.out.println("打印异常");            }        }else{            System.out.println("没法发现打印机服务");        }    }    /**     * 字符串输出     * @param graphics2D    画笔     * @param text          打印文本     * @param x             打印起点 x 坐标     * @param y             打印起点 y 坐标     * @param lineWidth     行宽     * @param lineHeight    行高     * @return  返回终点 y 坐标     */    private static int drawString(Graphics2D graphics2D, String text, int x, int y, int lineWidth, int lineHeight){        FontMetrics fontMetrics = graphics2D.getFontMetrics();        if(fontMetrics.stringWidth(text)<lineWidth){            graphics2D.drawString(text, x, y);            return y;        }else{            char[] chars = text.toCharArray();            int charsWidth = 0;            StringBuffer sb = new StringBuffer();            for(int i=0; i<chars.length; i++){                if((charsWidth + fontMetrics.charWidth(chars[i]))>lineWidth){                    graphics2D.drawString(sb.toString(), x, y);                    sb.setLength(0);                    y = y + lineHeight;                    charsWidth = fontMetrics.charWidth(chars[i]);                    sb.append(chars[i]);                }else{                    charsWidth = charsWidth + fontMetrics.charWidth(chars[i]);                    sb.append(chars[i]);                }            }            if(sb.length()>0){                graphics2D.drawString(sb.toString(), x, y);                y = y + lineHeight;            }            return y - lineHeight;        }    }}