我需要在我的应用程序上打印多个页面,但是当我尝试打印它时,我只打印了一页,或者打印了相同的页面5次。
我把代码放在下面:
MyPrintableTable mpt = new MyPrintableTable();
PrinterJob job = PrinterJob.getPrinterJob();
//PageFormat pf = job.defaultPage();
job.setPrintable(mpt);
job.printDialog();
try
{
job.print();
}
catch (PrinterException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
“MyPrintableTable”类:
class MyPrintableTable implements Printable
{
public int print(Graphics g, PageFormat pf, int pageIndex)
{
if (pageIndex != 0)
return NO_SUCH_PAGE;
Graphics2D g2 = (Graphics2D) g;
g2.setFont(new Font("Serif", Font.PLAIN, 16));
g2.setPaint(Color.black);
int x = 100;
int y = 100;
for(int i = 0; i < sTable.size(); i++)
{
g2.drawString(sTable.get(i).toString(), x, y);
y += 20;
}
return PAGE_EXISTS;
}
}
如果我更改“pageIndex!= 0”条件,我会打印更多页面,但所有页面都相同。
我想要打印我的所有文本,它有三页长度,但我只能打印第一个,打印第一个三次。
有人可以帮助我吗?
答案 0 :(得分:1)
这是一个测试程序,演示了我之前在评论中建议的原则。它基于Printing a Multiple Page Document的想法以及问题中的代码。在实际程序中,我可能会计算linesPerPage
而不是编译数字。
public class Test {
public static void main(String[] args) {
MyPrintableTable mpt = new MyPrintableTable();
PrinterJob job = PrinterJob.getPrinterJob();
// PageFormat pf = job.defaultPage();
job.setPrintable(mpt);
job.printDialog();
try {
job.print();
} catch (PrinterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
class MyPrintableTable implements Printable {
private int linesPerPage = 20;
private List<String> sTable = new ArrayList<String>();
{
for (int i = 0; i < 100; i++) {
sTable.add("Line" + i);
}
}
public int print(Graphics g, PageFormat pf, int pageIndex) {
if (pageIndex * linesPerPage >= sTable.size())
return NO_SUCH_PAGE;
Graphics2D g2 = (Graphics2D) g;
g2.setFont(new Font("Serif", Font.PLAIN, 16));
g2.setPaint(Color.black);
int x = 100;
int y = 100;
for (int i = linesPerPage * pageIndex; i < sTable.size()
&& i < linesPerPage * (pageIndex + 1); i++) {
g2.drawString(sTable.get(i).toString(), x, y);
y += 20;
}
return PAGE_EXISTS;
}
}