Java 如何将图像插入JTable单元格

有人能告诉我如何将图像添加到Java表格单元格中的正确方向吗。

或者在前面创建图像图标：

ImageIcon icon = new ImageIcon("image.gif");
table.setValueAt(icon, row, column);

或者，您可以尝试覆盖图标字段的渲染器：

static class IconRenderer extends DefaultTableCellRenderer {
  public IconRenderer() { super(); }

  public void setValue(Object value) {
    if (value == null) {
      setText("");
    }
    else
    {
      setIcon(value);
    }
}

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JTable已经为图标提供了默认的呈现器。您只需要告诉表在给定列中存储了哪些数据，以便它可以选择适当的渲染器。这是通过重写getColumnClass（…）方法完成的：

1-将标签添加到jtable（为此创建类）

2-编码jButton以添加图像

DefaultTableModel m = (DefaultTableModel) jTable1.getModel();
      jTable1.getColumn("image").setCellRenderer(new LabelRendar());  // call class 
      JLabel lebl=new JLabel("hello");
      lebl.setIcon(new javax.swing.ImageIcon(getClass().getResource("/main/bslogo120.png"))); // NOI18N
          m.addRow(new Object[]{"", "","",lebl});

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我创建了自己的类来实现TableCellRenderer。我可以从JLabel扩展这个类，但我更喜欢保持它的独立性，并将JLabel“label”用作类组件

public class GLabel implements TableCellRenderer{
    //The JLabel that is used to display image
    private final JLabel label = new JLabel();  
    
    /**
     * 
     * @param text
     * @param image 
     */
    public GLabel(String text, ImageIcon image) {
        label.setText(text);
        label.setIcon(image);
    }
    
    public GLabel(){}

    public JLabel getLabel() {
        return label;
    }      

    /**
     *
     * @param table the JTable that is asking the renderer to draw; can be null
     * @param value the value of the cell to be rendered. 
     * It is up to the specific renderer to interpret and draw the value. 
     * For example, if value is the string "true", it could be rendered as a string or it could be rendered as a check box that is checked. 
     * null is a valid value
     * @param isSelected true if the cell is to be rendered with the selection highlighted; otherwise false
     * @param hasFocus if true, render cell appropriately. For example, put a special border on the cell, if the cell can be edited, render in the color used to indicate editing
     * @param row the row index of the cell being drawn. When drawing the header, the value of row is -1
     * @param column the column index of the cell being drawn
     * @return 
     */
    @Override
    public Component getTableCellRendererComponent(JTable table,
                                      Object value,
                                      boolean isSelected,
                                      boolean hasFocus,
                                      int row,
                                      int column) {
        GLabel gLabel = (GLabel)value;
        return (Component) gLabel.getLabel();
    }
}

我创建了一个新的DefaultTableModel对象。我重写getColumnClass（）方法以在运行时传递适当的类

private final DefaultTableModel tblmodel = new DefaultTableModel() {        
        /**
         * This method is called by table cell renderer.
         * The method returns class of the cell data. This helps the renderer to display icons and 
         * other graphics in the table.
         */
        @Override
        public Class getColumnClass(int column)
        {
            for(int i = 0; i < tblmodel.getRowCount(); i++)
            {
                //The first valid value of a cell of given column is retrieved.
                if(getValueAt(i,column) != null)
                {
                    return getValueAt(i, column).getClass();
                }
            }
            //if no valid value is found, default renderer is returned.
            return super.getColumnClass(column);
        }
        
    };

我为GLabel类设置了默认渲染器

jtable.setDefaultRenderer(GLabel.class, new GLabel());

我创建了新的GLabel对象

GLabel glabel = new GLabel("testing", new ImageIcon("c://imagepath"));

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最后，我使用TableModel的addRow（Object[]rowData）方法将GLabel添加到JTable中。

另一个例子是：setIcon？定义在哪里？@Buffalo setIcon（（ImageIcon）值）@gumuruh链接断开了是的，它工作了！谢谢问题：为什么设置PreferredScrollableViewPortSize行？没有它似乎可以正常工作。@StefanReich，它与在表中显示图标无关。进行打包（）时，框架的大小不同。取决于您是否使用该方法的要求。@camickr啊，这是关于pack（），好的。（1-）不要向TableModel添加组件。模型应仅包含数据，并使用渲染器显示数据。（1-）不要向TableModel添加组件。模型应仅包含数据，并使用渲染器显示数据。

JTable jtable = new JTable(tblmodel);

jtable.setDefaultRenderer(GLabel.class, new GLabel());

GLabel glabel = new GLabel("testing", new ImageIcon("c://imagepath"));