java指定打印机名称进行打印

import java.awt.print.PrinterJob;
 
import java.awt.print.Book;
 
import java.awt.print.Printable;
 
import java.awt.Graphics;
 
import java.awt.print.PageFormat;
 
import java.awt.print.PrinterException;
 
import javax.print.PrintService;
 
import javax.print.PrintServiceLookup;
 
import java.awt.Graphics2D;
 
import java.awt.Color;
 
import java.awt.Font;
 
import javax.print.attribute.HashAttributeSet;
 
import javax.print.attribute.standard.PrinterName;
 
 
 
public class MyPrintTest
 
    implements Printable
 
{
 
  public int print(Graphics graphics, PageFormat pageFormat, int pageIndex)
 
      throws PrinterException
 
  {
 
    Graphics2D g2 = (Graphics2D) graphics;
 
    g2.setPaint(Color.black);
 
    g2.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
 
    Font font = new Font("宋体", Font.BOLD, 10);
 
    g2.setFont(font);
 
    g2.drawString("afasdfad", 10, 10);
 
    font = new Font("黑体", Font.ITALIC, 18);
 
    g2.setFont(font);
 
    g2.drawString("第二行:", 10, 40);
 
    return Printable.PAGE_EXISTS;
 
  }
 
 
 
  public static void main(String[] args)
 
  {
 
    MyPrintTest myprinttest = new MyPrintTest();
 
    myprinttest.print();
 
  }
 
 
 
  public void print()
 
  {
 
    PrinterJob printerJob = PrinterJob.getPrinterJob();
 
    Book book = new Book();
 
    book.append(new MyPrintTest(), printerJob.defaultPage());
 
    printerJob.setPageable(book);
 
    HashAttributeSet hs = new HashAttributeSet();
 
    String printerName="EPSON TM-U220 Receipt";
 
    hs.add(new PrinterName(printerName,null));
 
    PrintService[] pss = PrintServiceLookup.lookupPrintServices(null, hs);
 
    if(pss.length==0)
 
    {
 
      System.out.println("无法找到打印机:"+printerName);
 
      return ;
 
    }
 
    try
 
    {
 
      printerJob.setPrintService(pss[0]);
 
      printerJob.print();
 
    }
 
    catch (PrinterException ex)
 
    {
 
      System.out.println(ex.getMessage());
 
    }
 
  }
 
}