“无边落木萧萧下，不尽长江滚滚来”

前言

最近在帮别人做个打印的功能，就是登记完学生信息后，用小票打印出学生信息。打印预览图如下：

java打印宠物信息 java打印个人信息_lodop使用介绍

实现

首先我用Java代码实现：

import com.xxx.students.domain.StudentInfo;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.print.*;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;

public class PrintUtils implements Printable {

    private StudentInfo studentInfo;
    private HttpServletRequest request;

    public PrintUtils(HttpServletRequest request,StudentInfo studentInfo) {
        this.studentInfo = studentInfo;
        this.request = request;
    }

    public PrintUtils() {
    }

    @Override
    public int print(Graphics g, PageFormat pf, int page) throws PrinterException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        if (page > 0) {
            return NO_SUCH_PAGE;
        }
        Graphics2D g2d = (Graphics2D) g;
        g2d.setFont(new Font("Default", Font.PLAIN, 20));
        g2d.drawString("测试打印", 60, 20);
        g2d.drawString("-------------------------------------", 7, 30);
        g2d.setFont(new Font("Default", Font.PLAIN, 12));
        g2d.drawString("学生姓名：" + studentInfo.getName(), 5, 45);
        g2d.drawString("手机号码：" + studentInfo.getParentPhone(), 5, 75);
        g2d.drawString("课程名称：" + studentInfo.getCourseName(), 5, 105);
        g2d.drawString("缴费金额：" + studentInfo.getPaymentAmount() + " RMB", 5, 135);
        g2d.drawString("支付方式：" + studentInfo.getPaymentModeName(), 5, 165);
        g2d.drawString("打印时间：" + sdf.format(new Date()), 5, 195);
        g2d.drawImage(writeQrCodeContent(),50, 225,100,100, null);
        return PAGE_EXISTS;
    }


    /**
     *@author ruanhui
     *@date 2018/12/10
     *@description 生成二维码
     */
    public Image writeQrCodeContent()  {
        java.awt.Image im = null ;
        try {
            //获取图片路径
            String filePath = request.getSession().getServletContext().getRealPath("/") + "resource/images/";
            System.out.println("filePath:" + filePath) ;
            File file=new File(filePath + "xxx.jpg");
            System.out.println(file.getName());
            InputStream is = new FileInputStream(file);
            BufferedImage bi;
            bi = ImageIO.read(is);
             im = (java.awt.Image)bi;
        }catch (Exception e) {
            e.printStackTrace();
        }
        return im;
    }

    //打印方法
    public static void print(HttpServletRequest request,StudentInfo studentInfo) {

        int height = 250 + 3 * 15 + 20;

        // 通俗理解就是书、文档
        Book book = new Book();

        // 打印格式
        PageFormat pf = new PageFormat();
        pf.setOrientation(PageFormat.PORTRAIT);

        // 通过Paper设置页面的空白边距和可打印区域。必须与实际打印纸张大小相符。
        Paper p = new Paper();
        p.setSize(230, height);
        p.setImageableArea(5, -20, 230, height + 20);
        pf.setPaper(p);

        // 把 PageFormat 和 Printable 添加到书中，组成一个页面
        book.append(new PrintUtils(request,studentInfo), pf);

        // 获取打印服务对象
        PrinterJob job = PrinterJob.getPrinterJob();
        job.setPageable(book);
        try {
            job.print();
        } catch (PrinterException e) {
            System.out.println("================打印出现异常");
        }
    }
}

这段java代码能实现在本地运行中调用打印机并且打印。但是把项目放到服务器上就不能调本地的打印机了。
于是，有了第二种打印方法，用JS实现：

//测试打印
function doTestPrint() {
    var nowDate = new Date();
    //初始化打印机
    var LODOP=getLodop();
    LODOP.PRINT_INIT("测试打印");               //首先一个初始化语句
    LODOP.SET_PRINT_STYLE("FontSize", 25); //字体大小
    LODOP.ADD_PRINT_TEXT(20,50,150,20,"xxxx");//然后多个ADD语句及SET语句
    LODOP.SET_PRINT_STYLE("FontSize", 10); //字体大小
    LODOP.ADD_PRINT_TEXT(50,5,250,20,"--------------------------------");//然后多个ADD语句及SET语句
    LODOP.ADD_PRINT_TEXT(70,5,180,20,"学生姓名：诺贝尔爱情奖");//然后多个ADD语句及SET语句
    LODOP.ADD_PRINT_TEXT(95,5,180,20,"手机号码：123456");//然后多个ADD语句及SET语句
    LODOP.ADD_PRINT_TEXT(120,5,180,20,"课程名称：年卡");//然后多个ADD语句及SET语句
    LODOP.ADD_PRINT_TEXT(145,5,180,20,"缴费金额：1000RMB");//然后多个ADD语句及SET语句
    LODOP.ADD_PRINT_TEXT(170,5,180,20,"支付方式：支付宝支付");//然后多个ADD语句及SET语句
    LODOP.ADD_PRINT_TEXT(195,5,220,20,"打印时间：" + nowDate.getFullYear() + "-" + (nowDate.getMonth() + 1) + "-" + nowDate.getDate() + " " + nowDate.getHours() + ":" + nowDate.getMinutes() + ":" + nowDate.getSeconds());//然后多个ADD语句及SET语句
    // ADD_PRINT_TEXT(intTop,intLeft,intWidth,intHeight,strContent)增加纯文本项
    LODOP.ADD_PRINT_IMAGE(220,50,150,150,"<img border='0' src='../../resource/images/xxx.jpg' width='150' height='150'/>"); //打印二维码
    LODOP.SET_PRINT_STYLEA(0,"Stretch",2);//按原图比例(不变形)缩放模式
    LODOP.PREVIEW();    //打印预览
    // LODOP.PRINT();                               //最后一个打印(或预览、维护、设计)语句
}

在JS文件写上面的代码即可调用打印机。这里用到的插件就是Lodop。需要从官网下载类似驱动（我是这样的认为的）软件安装之后，然后需要引入它的JS文件，<script src="js/LodopFuncs.js?v=<%=new Date()%>"></script> 就这么简单，在哪都可以打印了。具体请见官网参考实例：官网样例