java控制打印机打印小票的小异常

[wenjie4892543]

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.font.FontRenderContext;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Date;

import javax.print.Doc;
import javax.print.DocFlavor;
import javax.print.DocPrintJob;
import javax.print.PrintException;
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.SimpleDoc;
import javax.print.attribute.DocAttributeSet;
import javax.print.attribute.HashDocAttributeSet;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.standard.MediaSize;
import javax.print.attribute.standard.MediaSizeName;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class TicketTest extends JFrame implements Printable,ActionListener {

	private static final long serialVersionUID = 1L;
	int PAGES = 1;
	private String printStr = null;
	private int printFlag = -1;
	public JFrame mainFrame = new JFrame();
	public JTextArea area = null;
	private JButton print = new JButton();
	private JScrollPane scrollPane;
	private JPanel btnPanel = new JPanel();

	public TicketTest() {
		Container contentPane = mainFrame.getContentPane();
		mainFrame.setSize(new Dimension(400, 300));
		mainFrame.setTitle("Print   example ");
		area = new JTextArea(30, 30);
		String str = getStr();
		area.setText(str);
		scrollPane = new JScrollPane(area);
		print = new JButton("Print");
		print.addActionListener(this);
		btnPanel.add(print);
		contentPane.add(btnPanel, BorderLayout.SOUTH);
		contentPane.add(area, BorderLayout.CENTER);
		mainFrame.pack();
		mainFrame.show();
	}

	public String getStr() {
		StringBuffer sb = new StringBuffer();
		sb.append("欢迎下次光临");
		sb.append("\r\n--------------------------------\r\n");
		sb.append("日期:" + new Date());
		sb.append("\r\n商品名称    数量  单价   ￥小计");
		sb.append("\r\n--------------------------------\r\n");
		return sb.toString();
	}

	public int print(Graphics g, PageFormat pf, int page)
			throws PrinterException {

		Graphics2D g2 = (Graphics2D) g;
		g2.setPaint(Color.red); // 设置打印颜色为黑色
		if (page >= PAGES) // 当打印页号大于需要打印的总页数时，打印工作结束
			return Printable.NO_SUCH_PAGE;
		g2.translate(pf.getImageableX(), pf.getImageableY());// 转换坐标，确定打印边界
		drawCurrentPageText(g2, pf, page); // 打印当前页文本
		return Printable.PAGE_EXISTS; // 存在打印页时，继续打印工作
		// return 1 ;
	}

	// 获取当前页的待打印文本内容
	private void drawCurrentPageText(Graphics2D g2, PageFormat pf, int page) {
		String s = getDrawText(printStr)[page];// 获取当前页的待打印文本内容
		FontRenderContext context = g2.getFontRenderContext();// 获取默认字体及相应的尺寸
		Font f = area.getFont();
		String drawText;
		float ascent = 16; // 给定字符点阵
		int k, i = f.getSize(), lines = 0;
		while (s.length() > 0 && lines < 30) // 每页限定在54行以内
		{
			k = s.indexOf('\n'); // 获取每一个回车符的位置
			if (k != -1) // 存在回车符
			{
				lines += 1; // 计算行数
				drawText = s.substring(0, k); // 获取每一行文本
				g2.drawString(drawText, 0, ascent); // 具体打印每一行文本，同时走纸移位
				if (s.substring(k + 1).length() > 0) {
					s = s.substring(k + 1); // 截取尚未打印的文本
					ascent += i;
				}
			} else // 不存在回车符
			{
				lines += 1; // 计算行数
				drawText = s; // 获取每一行文本
				g2.drawString(drawText, 0, ascent); // 具体打印每一行文本，同时走纸移位
				s = ""; // 文本已结束
			}
		}
	}

	/* 将打印目标文本按页存放为字符串数组 */
	public String[] getDrawText(String s) {
		String[] drawText = new String[PAGES];// 根据页数初始化数组
		for (int i = 0; i < PAGES; i++)
			drawText[i] = ""; // 数组元素初始化为空字符串

		int k, suffix = 0, lines = 0;
		while (s.length() > 0) {
			if (lines < 30) // 不够一页时
			{
				k = s.indexOf('\n');
				if (k != -1) // 存在回车符
				{
					lines += 1; // 行数累加
					// 计算该页的具体文本内容，存放到相应下标的数组元素
					drawText[suffix] = drawText[suffix] + s.substring(0, k + 1);
					if (s.substring(k + 1).length() > 0)
						s = s.substring(k + 1);
				} else {
					lines += 1; // 行数累加
					drawText[suffix] = drawText[suffix] + s; // 将文本内容存放到相应的数组元素
					s = "";
				}
			} else// 已满一页时
			{
				lines = 0; // 行数统计清零
				suffix++; // 数组下标加1
			}
		}
		return drawText;
	}

	// 计算需要打印的总页数
	public int getPagesCount(String curStr) {
		int page = 0;
		int position, count = 0;
		String str = curStr;
		System.out.println("1");
		while (str.length() > 0) // 文本尚未计算完毕
		{
			System.out.println("2");
			position = str.indexOf('\n'); // 计算回车符的位置
			count += 1; // 统计行数
			if (position != -1)
				str = str.substring(position + 1); // 截取尚未计算的文本
			else
				str = ""; // 文本已计算完毕
		}
		if (count > 0)
			page = count / 54 + 1; // 以总行数除以54获取总页数
		System.out.print(page + "page");
		return page; // 返回需打印的总页数
	}

	public void actionPerformed(ActionEvent evt) {
		printText2Action();
	}
	
	// 以jdk1.4新版本提供的API实现打印动作按钮监听，并完成具体的打印操作
	private void printText2Action() {
		printFlag = 0; // 打印标志清零
		printStr = area.getText().trim();// 获取需要打印的目标文本
		
		System.out.println("the   content   are   ::: ");
		System.out.println(printStr);

		 if (printStr != null && printStr.length() > 0) //当打印内容不为空时
		  {
		    PAGES = getPagesCount(printStr); //获取打印总页数
		    //指定打印输出格式
		    DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
		    //定位默认的打印服务
		    PrintService printService = PrintServiceLookup.lookupDefaultPrintService();
		    System.out.println("11"+printService+"----------");
		    System.out.println(this);
		    System.out.println(flavor);
		    //创建打印作业
		    DocPrintJob job = printService.createPrintJob();
		    //设置打印属性
		    PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();
		    DocAttributeSet das = new HashDocAttributeSet();
		    System.out.println(das);
		    try {
				System.out.println( Class.forName(flavor.getRepresentationClassName()));
			} catch (ClassNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		    //指定打印内容
		    Doc doc = new SimpleDoc(this, flavor, das);
		    //不显示打印对话框，直接进行打印工作
			try {
				job.print(doc, pras); // 进行每一页的具体打印操作
			} catch (PrintException pe) {
				pe.printStackTrace();
			}
		} else {
			JOptionPane
					.showConfirmDialog(
							null,
							"Sorry,   Printer   Job   is   Empty,   Print   Cancelled! ",
							"Empty ", JOptionPane.DEFAULT_OPTION,
							JOptionPane.WARNING_MESSAGE);
		}
	}

	// test
	public static void main(String[] args) {
		TicketTest test = new TicketTest();
	}

}

异常：
javax.print.PrintException: java.awt.print.PrinterException: Paper's imageable width is too small.
at sun.print.Win32PrintJob.printableJob(Unknown Source)
at sun.print.Win32PrintJob.print(Unknown Source)
at TicketTest.printText2Action(TicketTest.java:213)
at TicketTest.actionPerformed(TicketTest.java:176)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased

[wenjie4892543]

job.print(doc, pras); // 进行每一页的具体打印操作 这一行报错！！！！！！！！

[wenjie4892543]

声明接口printable

[aiqinhai66]

请问这个打印的方法只能调用本机的打印服务吗，将其应用在网站上的打印，用其他电脑访问我的工程，点击打印只能在我电脑上打印

[在程序的道理上搬砖的猿]

打印成像区域太小 还好添加成像区域属性 width单位是像素 MediaPrintableArea area = new MediaPrintableArea(0, 0, width, 800, MediaPrintableArea.MM); set.add(area); pras.add(area);