Use Java to write the print preview and print setting functions of form data

Use Java to write print preview and print setting functions of form data

With the development of information technology, more and more work is shifting from paper documents to electronic documents document. However, in some specific application scenarios, it is still necessary to print electronic documents into paper documents. In order to improve the user experience, we can write code in Java to implement the print preview and print setting functions of form data. This article will introduce how to use Java to implement such a function and give corresponding code examples.

1. Implementation of print preview function

The print preview function can be implemented through Java, so that users can preview the printing effect before printing to ensure that the printing result meets expectations. The following is a code example to implement the print preview function:

import java.awt.BorderLayout;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;

public class PrintPreviewExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        JEditorPane editorPane = new JEditorPane();
        JScrollPane scrollPane = new JScrollPane(editorPane);
        frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
        
        frame.setSize(400, 300);
        frame.setVisible(true);
        
        // 假设文本编辑器中有需要打印的表单数据
        editorPane.setText("表单数据示例");
        
        try {
            PrinterJob job = PrinterJob.getPrinterJob();
            job.setPrintable(editorPane.getPrintable(null, null));
            if (job.printDialog()) {
                job.print();
            }
        } catch (PrinterException e) {
            e.printStackTrace();
        }
    }
}

In the above code, we use Swing's JFrame and JEditorPane components to create a simple text editor interface in which users can enter form data. When the user clicks the print button, first create a PrinterJob object and set the text editor's printing function to the implementation of the Printable interface. Then call the printDialog() method of the PrinterJob class, and the user can set the printer and printing parameters in the dialog box. Finally, call the print() method to implement printing.

2. Implementation of print setting function

In addition to the print preview function, we can also implement the print setting function through Java, such as setting the printing paper size, printing direction, etc. The following is a code example to implement the print setting function:

import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import javax.print.PrintService;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.standard.MediaSize;
import javax.print.attribute.standard.OrientationRequested;

public class PrintSettingsExample {
    public static void main(String[] args) {
        try {
            PrinterJob job = PrinterJob.getPrinterJob();
            
            PrintService[] printServices = PrinterJob.lookupPrintServices();
            if (printServices.length <= 0) {
                throw new PrinterException("无可用打印机");
            }
            job.setPrintService(printServices[0]);
            
            PrintRequestAttributeSet attrSet = new HashPrintRequestAttributeSet();
            attrSet.add(OrientationRequested.LANDSCAPE);
            attrSet.add(MediaSize.ISO.A4);
            
            job.setPrintable(null, null);
            job.printDialog(attrSet);
        } catch (PrinterException e) {
            e.printStackTrace();
        }
    }
}

In the above code, we first obtain the available printers in the system through the lookupPrintServices() method of the PrinterJob class. Then set the print job's print service to the first available printer. Next, create a PrintRequestAttributeSet object and add printing parameters, such as setting the printing direction to landscape and setting the paper size to A4. Finally, the print settings dialog box is displayed by calling the printDialog() method, in which the user can set printing parameters.

Through the above code example, we can realize the print preview and print setting functions of form data. Users can confirm the printing effect through preview when using the application, and can also set printing parameters as needed to meet different needs. This can improve user efficiency and experience.

I hope the above sample code will be helpful to you and can achieve the print preview and print setting functions you need. Of course, the actual situation may require appropriate adjustments and modifications based on your needs. Good luck with your feature implementation!

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