把jTable一列排序在一个按键上实现？

[狂人信仰]

我想在一个按键上实现一个事件
把jTable一列排序
怎么做

[古布]

1. EventListener
public class KeyEventDemo ... implements KeyListener ... {
...//where initialization occurs:
typingArea = new JTextField(20);
typingArea.addKeyListener(this);

//Uncomment this if you wish to turn off focus
//traversal. The focus subsystem consumes
//focus traversal keys, such as Tab and Shift Tab.
//If you uncomment the following line of code, this
//disables focus traversal and the Tab events
//become available to the key event listener.
//typingArea.setFocusTraversalKeysEnabled(false);
...
/** Handle the key typed event from the text field. */
public void keyTyped(KeyEvent e) {
displayInfo(e, "KEY TYPED: ");
}

/** Handle the key-pressed event from the text field. */
public void keyPressed(KeyEvent e) {
displayInfo(e, "KEY PRESSED: ");
}

/** Handle the key-released event from the text field. */
public void keyReleased(KeyEvent e) {
displayInfo(e, "KEY RELEASED: ");
}
...
private void displayInfo(KeyEvent e, String keyStatus){

//You should only rely on the key char if the event
//is a key typed event.
int id = e.getID();
String keyString;
if (id == KeyEvent.KEY_TYPED) {
char c = e.getKeyChar();
keyString = "key character = '" + c + "'";
} else {
int keyCode = e.getKeyCode();
keyString = "key code = " + keyCode
+ " ("
+ KeyEvent.getKeyText(keyCode)
+ ")";
}

int modifiersEx = e.getModifiersEx();
String modString = "extended modifiers = " + modifiersEx;
String tmpString = KeyEvent.getModifiersExText(modifiersEx);
if (tmpString.length() > 0) {
modString += " (" + tmpString + ")";
} else {
modString += " (no extended modifiers)";
}

String actionString = "action key? ";
if (e.isActionKey()) {
actionString += "YES";
} else {
actionString += "NO";
}

String locationString = "key location: ";
int location = e.getKeyLocation();
if (location == KeyEvent.KEY_LOCATION_STANDARD) {
locationString += "standard";
} else if (location == KeyEvent.KEY_LOCATION_LEFT) {
locationString += "left";
} else if (location == KeyEvent.KEY_LOCATION_RIGHT) {
locationString += "right";
} else if (location == KeyEvent.KEY_LOCATION_NUMPAD) {
locationString += "numpad";
} else { // (location == KeyEvent.KEY_LOCATION_UNKNOWN)
locationString += "unknown";
}

...//Display information about the KeyEvent...
}
}
2.代码参考 jdk/src.zip/javax/swing/table/TableRowSorter.java

在TableRowSorterModelWrapper中 getStringValueAt函数里面,
把要比较的多列值连接起来,我是用//连接
Object o = getValueAt(row, column);//这行后面取其它列的值

if(column == 2)
o = o.toString() + "//" +getValueAt(row, 3);


在getComparator函数里面, 如果列数是你要排序的列时, 调用自己的 MY_COMPARABLE_COMPARATOR
我的是第2列 if(column == 2) return MY_COMPARABLE_COMPARATOR;

在开始定义
private static final Comparator MY_COMPARABLE_COMPARATOR =
new MyComparableComparator();


在自己的 MyComparableComparator函数里面 ,把连接起来的字符串拆开, 比较.
private static class MyComparableComparator implements Comparator {
@SuppressWarnings("unchecked")

//public int compare(Object o1, Object o2) {
// return ((Comparable)o1).compareTo(o2);
//}

public int compare(Object obj1,Object obj2){
String[] s1 = obj1.toString().split("//");
String[] s2 = obj2.toString().split("//");

int flag=s1[0].compareTo(s2[0]);
if(flag==0){
return 0-s1[1].compareTo(s2[1]);
}else{
return flag;
}
}
}