用java 打印的例子程序

package aa;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;

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.MediaSizeName;
import javax.swing.JOptionPane;

/**
 * java定位打印，把打印内容打到指定的地方。
 *
 * @author lyb
 *
 */
public class throwadv implements Printable
{

    private int PAGES = 0;
    private String printStr;

    /*
     * Graphic指明打印的图形环境；PageFormat指明打印页格式（页面大小以点为计量单位，
     * 1点为1英寸的1/72，1英寸为25.4毫米。A4纸大致为595×842点）；page指明页号
     */
    public int print(Graphics gp, PageFormat pf, int page)
            throws PrinterException
    {
        Graphics2D g2 = (Graphics2D) gp;
        g2.setPaint(Color.black); // 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
        Font font = new Font("宋体", Font.PLAIN, 24);// 创建字体
        g2.setFont(font);
        // 打印当前页文本
        int printFontCount = printStr.length();// 打印字数
        int printFontSize = font.getSize();// Font 的磅值大小
        float printX = 595 / 2; // 给定字符点阵，X页面正中
        float printY = 842 / 2; // 给定字符点阵，Y页面正中
        float printMX = printX - (printFontCount * printFontSize / 2);// 打印到正中间
        float printMY = printY - printFontSize / 2;// 打印到正中间
        g2.drawString(printStr, printMX, printMY); // 具体打印每一行文本，在指定位置
        g2.drawString(printStr, printMX - printFontSize * printFontCount,
                printMY + printFontSize); // 具体打印每一行文本
        g2.drawString(printStr, printMX + printFontSize * printFontCount,
                printMY + printFontSize); // 具体打印每一行文本
        g2.drawString(printStr, printMX, printMY + printFontSize * 2); // 具体打印每一行文本
        g2.drawString(printStr, printMX, printMY + printFontSize * 2);
         g2.drawString(printStr, printMX, printMY + printFontSize * 2);
          g2.drawString(printStr, printMX, printMY + printFontSize * 2);
        return Printable.PAGE_EXISTS; // 存在打印页时，继续打印工作
    }

    // 打印内容到指定位置
    public void printContent()
    {
        printStr = "打印测试内容";// 获取需要打印的目标文本
        if (printStr != null && printStr.length() > 0) // 当打印内容不为空时
        {
            PAGES = 1; // 获取打印总页数
            // 指定打印输出格式
            DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;

            // 设置打印属性
            PrintRequestAttributeSet pras = new HashPrintRequestAttributeSet();
            // 设置纸张大小,也可以新建MediaSize类来自定义大小
            pras.add(MediaSizeName.ISO_A4);
            DocAttributeSet das = new HashDocAttributeSet();
            // 指定打印内容
            Doc doc = new SimpleDoc(this, flavor, das);

            // 定位默认的打印服务
            PrintService printService = null;
            printService = PrintServiceLookup.lookupPrintServices(flavor, pras)[0];
            System.out.println(printService);
            // 创建打印作业
            DocPrintJob job = printService.createPrintJob();
            try
            {
                job.print(doc, pras); // 进行每一页的具体打印操作

            }
            catch (PrintException pe)
            {
                pe.printStackTrace();
            }
        }
        else
        {
            // 如果打印内容为空时，提示用户打印将取消
            JOptionPane.showConfirmDialog(null,
                    "Sorry, Printer Job is Empty, Print Cancelled!",
                    "Empty", JOptionPane.DEFAULT_OPTION,
                    JOptionPane.WARNING_MESSAGE);
        }
    }

    public static void main(String[] args)
    {
        throwadv lp = new throwadv();
        lp.printContent();
    }
}