Java中如何实现打印预览功能

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要在 Java 中实现打印预览功能，可以使用 Java 提供的打印 API 和 Swing 组件来实现。以下是一个简单的示例代码：

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class PrintPreviewExample extends JFrame {private JTextArea textArea;
    
    public PrintPreviewExample() {setTitle("Print Preview Example");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        textArea = new JTextArea();
        JScrollPane scrollPane = new JScrollPane(textArea);
        
        JPanel buttonPanel = new JPanel();
        JButton previewButton = new JButton("Print Preview");
        previewButton.addActionListener(new ActionListener() {@Override
            public void actionPerformed(ActionEvent e) {PrintService defaultPrintService = PrintServiceLookup.lookupDefaultPrintService();
                textArea.print(null, null, true, defaultPrintService, null, true);
            }
        });
        
        buttonPanel.add(previewButton);
        
        add(scrollPane, BorderLayout.CENTER);
        add(buttonPanel, BorderLayout.SOUTH);
        
        pack();
        setLocationRelativeTo(null);
    }
    
    public static void main(String[] args) {PrintPreviewExample example = new PrintPreviewExample();
        example.setVisible(true);
    }

}