用Java打印数据

Question

我有一个表单,用户可以用数据填写字段.此后,他/她应该能够将数据导出为我已经编写的pdf,如下所示:

public void onSubmit() {
try {
    ManagerModel manager = managerDao.getManager(person);
    PictureModel picture = new PictureModel();
    if (person.getPhotoId() != null) {
        picture = new PictureModel(pictureDao.findPictureById(person.getPhotoId()));
    }
    getRequestCycle().setRequestTarget( new FileRequestTarget(Exporter.exportFile(person, manager, picture), person.getPdfName()));
} catch (Exception e) {
    Log.warn(e);
}

现在这为我提供了pdf导出以及所有数据.我还想创建一个按钮,允许用户打印在这些字段中输入的数据.现在,这应该是表单上的打印按钮,而不是要求用户导出然后打印.

有人可以建议我如何创建这个打印按钮？我应该只使用pdf导出的输出然后将其发送到打印机？如果是这样,我如何在java中写这个？

Answer 1

那你可以简单地创建一个按钮:

 import javax.swing.*;
 ....
 JButton button = new JButton("Print");

然后添加一个ActionListener按钮:

import java.awt.*;
....
button.addActionListener(new ActionListener() {
            @override
            public void actionPerformed(ActionEvent e)
            {
                //Execute when button is pressed
                printPDF("path/to/file/.pdf");
            }
        });   

然后打印PDF您可以使用此方法:

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import javax.print.*;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
....
public static void printPDF(String file) {

    FileInputStream psStream = null;
    try {
        psStream = new FileInputStream(file);
    } catch (FileNotFoundException ffne) {
        ffne.printStackTrace();
    }
    if (psStream == null) {
        return;
    }
    DocFlavor psInFormat = DocFlavor.INPUT_STREAM.AUTOSENSE;
    Doc myDoc = new SimpleDoc(psStream, psInFormat, null);
    PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
    PrintService[] services = PrintServiceLookup.lookupPrintServices(psInFormat, aset);

    // this step is necessary because I have several printers configured  
    PrintService myPrinter = null;
    for (int i = 0; i < services.length; i++) {
        String svcName = services[i].toString();
        System.out.println("service found: " + svcName);
        if (svcName.contains("printer closest to me")) {
            myPrinter = services[i];
            System.out.println("my printer found: " + svcName);
            break;
        }
    }
    if (myPrinter != null) {
        DocPrintJob job = myPrinter.createPrintJob();
        try {
            job.print(myDoc, aset);

        } catch (Exception pe) {
            pe.printStackTrace();
        }
    } else {
        System.out.println("no printer services found");
    }
}

附录:

• 要在可能没有"最接近我的打印机"的特定打印机上进行此操作:更改此代码以包括您的打印机名称,或使用contains()或equals()分别包含的确切打印机名称:

  String printerName="";
  ....
  if (svcName.contains(printerName)||svcName.equals(printerName)) {
                      myPrinter = services[i];
                      System.out.println("my printer found: " + svcName);
                      break;
  }
  

参考文献:

• 打印PDF Java
• 如何在Java中将ActionListener添加到JButton中
• 如何创建JButton