目前在用jtable做一个 属性编辑器，table就二列，一列属性名，一列属性值。 需要根据属性值动态生成编辑器(JComboBox、JCheckBox、JTextArea)。
基本功能已实现 现在存在如下问题：
1.JCheckBox显示没问题，但是点击时位置不正确(会跑到单元格最左边)。
2.JTextArea显示有问题，没有一开始就换行显示，要编辑的时候才换行显示。
请大家帮忙看一下，谢谢大家了！
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
import javax.swing.AbstractCellEditor;
import javax.swing.DefaultCellEditor;
import javax.swing.DefaultListSelectionModel;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.ListSelectionModel;
import javax.swing.WindowConstants;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumnModel;
public class PropertyJtable extends JTable {
public PropertyJtable(Vector rowData, Vector columnNames) {
super(rowData, columnNames);
}
public JComboBox getJComboBox() {
JComboBox comboBox = new JComboBox();
comboBox.addItem("red");
comboBox.addItem("green");
comboBox.addItem("blue");
return comboBox;
}
public static void main(String[] args) {
JFrame frame = new JFrame("属性编辑器");
frame.setSize(250, 200);
frame.setPreferredSize(new Dimension(250, 200));
frame.setLayout(new BorderLayout());
frame.setLocationRelativeTo(null);
Vector title = new Vector();
title.add("Property");
title.add("Value");
JTable jtable = new PropertyJtable(new Vector(), title);
JScrollPane scrollPane = new JScrollPane(jtable);
DefaultTableModel model = (DefaultTableModel) jtable.getModel();
model.addRow(new Object[] { "name", "阿呆" });
model.addRow(new Object[] { "是否显示", new Boolean(true) });
model.addRow(new Object[] { "颜色1", "red" });
model.addRow(new Object[] { "颜色2", "blue" });
model.addRow(new Object[] { "年龄", "24" });
model.addRow(new Object[] { "备注", "山东分\n舵是否公司的\n故事啊发放" });
jtable.getColumnModel().getColumn(0).setPreferredWidth(50);
jtable.getColumnModel().getColumn(1).setPreferredWidth(150);
frame.add(scrollPane, BorderLayout.CENTER);
JButton printButton = new JButton("关闭");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
printButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
System.exit(0);
}
});
frame.add(printButton, BorderLayout.SOUTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
// 根据值来设置单元格类型
public TableCellEditor getCellEditor(int row, int col) {
TableCellEditor editor = super.getCellEditor(row, col);
// JCheckBox
if ("true".equals(getValueAt(row, col).toString())
|| "false".equals(getValueAt(row, col).toString())) {
// editor=super.getDefaultEditor(JCheckBox.class);
editor = new DefaultCellEditor(new JCheckBox());
}
// JComboBox
if ("red".equals(getValueAt(row, col).toString())
|| "green".equals(getValueAt(row, col).toString())
|| "blue".equals(getValueAt(row, col).toString())) {
editor = new DefaultCellEditor(getJComboBox());
}
// 字数大于10 使用JTextArea
if (getValueAt(row, col).toString().length() > 10) {
editor = new JTextAreaEditor();
}
return editor;
}
// 单元格渲染
public TableCellRenderer getCellRenderer(int row, int col) {
TableCellRenderer renderer = super.getCellRenderer(row, col);
if ("true".equals(getValueAt(row, col).toString())
|| "false".equals(getValueAt(row, col).toString())) {
renderer = super.getDefaultRenderer(Boolean.class);
}
return renderer;
}
// 第一行不可编辑
public boolean isCellEditable(int row, int col) {
return (col != 0);
}
/*
* 重写方法 单选模式 (non-Javadoc)
*
* @see javax.swing.JTable#createDefaultSelectionModel()
*/
protected ListSelectionModel createDefaultSelectionModel() {
DefaultListSelectionModel defaultListSelectionModel = new DefaultListSelectionModel();
defaultListSelectionModel
.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
return defaultListSelectionModel;
}
class JTextAreaEditor extends AbstractCellEditor implements TableCellEditor {
protected JTextArea myEditor;
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
if (null == myEditor) {
myEditor = new JTextArea();
}
myEditor.setText((String) value);
TableColumnModel columnModel = table.getColumnModel();
myEditor.setSize(columnModel.getColumn(column).getWidth(), 5);
int heightWanted = (int) myEditor.getPreferredSize().getHeight();
if (heightWanted != table.getRowHeight(row)) {
table.setRowHeight(row, heightWanted);
}
return myEditor;
}
@Override
public Object getCellEditorValue() {
return myEditor.getText();
}
}
}
1.显示的时候你要自适应显示宽度高度，还需要对该列写个render，你写的render只是显示一个textarea组件，具体可以参考我写的
class TableCellTextAreaRenderer extends JTextArea implements TableCellRenderer {
public TableCellTextAreaRenderer() {
setLineWrap(true);
setWrapStyleWord(true);
}
public Component getTableCellRendererComponent(JTable table,Object value,boolean isSelected,boolean hasFocus,int row,int column) {
// 计算当下行的最佳高度
int maxPreferredHeight = 0;
for (int i = 0; i < table.getColumnCount(); i++) {
setText("" + table.getValueAt(row, i));
setSize(table.getColumnModel().getColumn(column).getWidth(), 0);
maxPreferredHeight = Math.max(maxPreferredHeight, getPreferredSize().height);
}
if (table.getRowHeight(row) != maxPreferredHeight) // 少了这行则不能重绘
table.setRowHeight(row, maxPreferredHeight);
setText(value == null ? "" : value.toString());
return this;
}
}
2.关于jcheckbox跳到左边的问题，我以前也遇到到，好像只要该列值为boolean型，就不需要另写个render或者editor了。。会默认用jcheckbox展示