Question

我们需要在pdf上绘制JTable。对于这个要求，我采用了JTable并直接打印到pdf上。但是我没有获得JTable的Left和Top边框。另外，我需要为表格切割单元格边框。无论如何，我可以为JTable中的单元格赋予不同的颜色边框吗？例如： -

Left Border = Grid Color
Top Border = Grid Color
Right Border = Black Color
Bottom Border =  Grid Color

任何与此相关的建议都会非常有用吗？

Answer 1

在打印前向表格添加MatteBorder。

Color color = UIManager.getColor("Table.gridColor");
MatteBorder border = new MatteBorder(1, 1, 0, 0, color);
table.setBorder(border);

Answer 2

@andrewthompson提供的链接应该为您提供表格边框打印问题的第一部分答案（a.k.a。Why does the JTable header not appear in the image?）

要在表格中获得不同颜色的内部边框（我相信这是您的第二个问题），您必须结合使用MatteBorder和CompoundBorder以及{{1} }}

TableCellRenderer

Answer 3

感谢您的所有代码。我真的很感谢通过贡献他们的时间和精力来帮助我们的人。那么所有这些解决方案都将解决问题。我用以下代码得到了很好的解决方案： -

 package com.swing.data;

import java.awt.*;   
import javax.swing.*;   
import javax.swing.border.*;   
import javax.swing.table.*;   

public class TableExample{   
    public static void main(String[] args) {   
        final JFrame f = new JFrame("TableExample");   
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   
        f.getContentPane().add(createTable());   
        f.pack();   
        SwingUtilities.invokeLater(new Runnable(){   
            public void run() {   
                f.setLocationRelativeTo(null);   
                f.setVisible(true);   
            }   
        });   
    }   

    static JComponent createTable() {   
        final JTable table = new JTable(9,9) {   
            private static final long serialVersionUID = 0;   

            Color B = Color.RED;   
            Color C = this.getGridColor();   
            final Border[][] borders = {   
                {new ZoneBorder(C,B,B,B), new ZoneBorder(B,C,C,C), new ZoneBorder(B,B,C,C)},   
                {new ZoneBorder(C,C,C,B), new ZoneBorder(C,C,C,C), new ZoneBorder(C,B,C,C)},   
                {new ZoneBorder(C,C,B,B), new ZoneBorder(C,C,B,C), new ZoneBorder(C,B,B,C)}   
            };   

            public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {   
                Component result = super.prepareRenderer(renderer, row, column);   
                if (result instanceof JComponent) {   
                    if(row == 0 && column == 0)
                    ((JComponent) result).setBorder(borders[0][0]);   
                }   
                return result;   
            }   
        };   
        table.setRowHeight(28);   
        //table.setGridColor(Color.BLACK);   
        TableColumnModel tcm = table.getColumnModel();   
        for(int c = 0; c<table.getColumnCount(); ++c) {   
            TableColumn tc = tcm.getColumn(c);   
            tc.setPreferredWidth(28);   
        }   
        JPanel inner = new JPanel(new GridLayout());   
        //inner.setBorder(BorderFactory.createLineBorder(Color.BLACK, 3));   
        inner.add(table);   
        return inner;   
    }   
}  

    package com.swing.data;

import java.awt.*;   
import javax.swing.*;   
import javax.swing.border.*;   

public class ZoneBorder implements Border {   
    private static final int WIDTH = 1;   
    private Color colorN, colorE, colorS, colorW;   

    public ZoneBorder(Color colorN, Color colorE, Color colorS, Color colorW) {   
        this.colorN=colorN;   
        this.colorE=colorE;   
        this.colorS=colorS;   
        this.colorW=colorW;   
    }   

    public boolean isBorderOpaque() {   
        return false;   
    }   

    public Insets getBorderInsets(Component c) {   
        return new Insets(WIDTH,WIDTH,WIDTH,WIDTH);   
    }   

    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {   
        Color old = g.getColor();   
        if (colorN != null) {   
            g.setColor(colorN);   
            g.fillRect(x, y, width, WIDTH);   
        }   
        if (colorE != null) {   
            g.setColor(colorE);   
            g.fillRect(x+width-WIDTH, y, WIDTH, height);   
        }   
        if (colorS != null) {   
            g.setColor(colorS);   
            g.fillRect(x, y+height-WIDTH, width, WIDTH);   
        }   
        if (colorW != null) {   
            g.setColor(colorW);   
            g.fillRect(x, y, WIDTH, height);   
        }   
        g.setColor(old);   
    }   
}

谢谢！

怎样才能给出不同颜色的JTable单元边框（左，右，上，下）？

3 个答案: