如何在pdf中导出一对一的JTable

可能重复：
为什么JTable标题没有出现在图像中？
在Panel上绘制JTable行和列

我正在编写一个报表应用程序，我必须以报表的forms导出JTable。 但是当我尝试在PDF上直接绘制JTable时，它不会显示第一行和列边框。 为此我尝试使用默认颜色网格左上边框。 这给了我一个更深的PDF格式。 但是，当尝试使用颜色填充任何特定单元格并将其导出为PDF输出时，所有网格线都是不可见的。

SimpleTableDemo.java ：

package com.swing.table; import java.awt.Color; import java.awt.Component; import java.awt.Dimension; import java.awt.Graphics2D; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.FileOutputStream; import java.util.HashMap; import java.util.Map; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.border.LineBorder; import javax.swing.table.TableCellRenderer; import javax.swing.table.TableColumn; import javax.swing.table.TableColumnModel; import com.itextpdf.text.Document; import com.itextpdf.text.PageSize; import com.itextpdf.text.pdf.PdfContentByte; import com.itextpdf.text.pdf.PdfTemplate; import com.itextpdf.text.pdf.PdfWriter; import com.swing.data.BorderCellRenderer; public class SimpleTableDemo extends JPanel implements ActionListener { private boolean DEBUG = false; private int spacing = 6; private Map columnSizes = new HashMap(); String[] columnNames = { "First Name", "Last Name", "Sport", "# of Years", "Vegetarian" }; Object[][] data = { { "Kathy", "Smith", "SnowboardingXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", new Integer(5), new Boolean(false) }, { "John", "Doe", "Rowing", new Integer(3), new Boolean(true) }, { "Sue", "Black", "Knitting", new Integer(2), new Boolean(false) }, { "Jane", "White", "Speed reading", new Integer(20), new Boolean(true) }, { "Joe", "Brown", "Pool", new Integer(10), new Boolean(false) } }; final JTable table = new JTable(data, columnNames); public SimpleTableDemo() { super(new GridLayout(0, 1)); table.setPreferredScrollableViewportSize(new Dimension(500, 70)); // table.setFillsViewportHeight(true); // Create the scroll pane and add the table to it. JScrollPane scrollPane = new JScrollPane(table); BorderCellRenderer cellRenderer = new BorderCellRenderer(); cellRenderer.setBorder(new LineBorder(Color.BLACK)); table.setDefaultRenderer(Object.class, cellRenderer); table.repaint(); // Add the scroll pane to this panel. add(scrollPane); JButton button = new JButton("Create Pdf"); button.addActionListener(this); add(button); } public void actionPerformed(ActionEvent e) { print(); } private void print() { Document document = new Document(PageSize.A4.rotate()); try { PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("D:/jTable.pdf")); document.open(); PdfContentByte cb = writer.getDirectContent(); cb.saveState(); PdfTemplate pdfTemplate = cb.createTemplate(table.getWidth(), table.getHeight()); Graphics2D g2 = pdfTemplate.createGraphics(table.getWidth(), table.getHeight()); /*g2.setColor(Color.BLACK); g2.drawRect(x-2, y-2, table.getWidth()+2, table.getHeight()+2);*/ table.print(g2); cb.addTemplate(pdfTemplate, 20, 20); g2.dispose(); cb.restoreState(); } catch (Exception e) { System.err.println(e.getMessage()); } document.close(); } /** Create the GUI and show it. For thread safety, this method should be invoked from the event-dispatching thread. */ private static void createAndShowGUI() { // Create and set up the window. JFrame frame = new JFrame("SimpleTableDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Create and set up the content pane. SimpleTableDemo newContentPane = new SimpleTableDemo(); newContentPane.setOpaque(true); // content panes must be opaque frame.setContentPane(newContentPane); // Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { // Schedule a job for the event-dispatching thread: // creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } } 

BorderCellRenderer.java ：

 package com.swing.data; import java.awt.*; import javax.swing.*; import javax.swing.table.*; import javax.swing.border.*; /** * @version 1.0 03/06/99 */ public class BorderCellRenderer extends JLabel implements TableCellRenderer { protected Border noFocusBorder; protected Border columnBorder; protected Font font; public Font getFont() { return font; } public void setFont(Font font) { this.font = font; } public BorderCellRenderer() { noFocusBorder = new EmptyBorder(1, 2, 1, 2); setOpaque(true); } public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { setText((value == null) ? "" : value.toString()); Border b; b = BorderFactory.createCompoundBorder(); // b = BorderFactory.createCompoundBorder(b, BorderFactory.createMatteBorder(0,0,1,0,table.getGridColor())); // b = BorderFactory.createCompoundBorder(b, BorderFactory.createMatteBorder(0,0,0,1,table.getGridColor())); /* if(row == 0 && column == 0) { setBackground(Color.CYAN); } else { setBackground(Color.WHITE); } */ if(row==0 || column == 0) { if(row ==0 && column==0) { b = BorderFactory.createCompoundBorder(b, BorderFactory.createMatteBorder(0,1,0,0,table.getGridColor())); b = BorderFactory.createCompoundBorder(b, BorderFactory.createMatteBorder(1,0,0,0,table.getGridColor())); } if(row == 0) { b = BorderFactory.createCompoundBorder(b, BorderFactory.createMatteBorder(1,0,0,0,table.getGridColor())); setBackground(Color.CYAN); } if(column == 0) { b = BorderFactory.createCompoundBorder(b, BorderFactory.createMatteBorder(0,1,0,0,table.getGridColor())); } } else { b = table.getBorder(); setBackground(Color.WHITE); } setBorder(b); return this; } public void setColumnBorder(Border border) { columnBorder = border; } public Border getColumnBorder() { return columnBorder; } } 

请尝试使用上面的代码，并帮助我获得带网格线和填充单元格颜色的一对一PDF输出。

更新1： – 我修改了actionPerformed（）方法的代码，如下所示： –

 public void actionPerformed(ActionEvent e) { int x = table.getWidth(); int y = table.getHeight(); BufferedImage bi = null; if(x>0 && y>0) { bi = new BufferedImage(x, y, BufferedImage.TYPE_INT_RGB); if(bi != null) { Graphics g = bi.createGraphics(); table.paint(g); JOptionPane.showMessageDialog(null, new JLabel(new ImageIcon(bi))); } } print(); } 

感谢您查看我的代码。 我的要求是不显示表头。 我不想按预期打印标题。 这就是为什么我的第一行顶部边框和第一列遗留下来的原因。 为了纠正这个问题，我手动为第一列和第一行添加了一个默认网格边框。 这使得顶部边框看起来是深灰色。 除此之外，我还必须用细胞填充细胞。 当我将它打印到缓冲图像时它看起来不错但后来在pdf上它从下面的屏幕截图中删除了我的网格线： –

JTable到bufferedImage输出

JTable到pdf输出