我如何构建自己的 KeyEvent 对象，使其与最终用户键入内容时从 KeyListener 接收到的对象完美(或非常接近)匹配？
例如，我有一个英国 ISO 键盘布局，要键入 " 字符，我按 Shift+2。如果我在 JFrame 上记录它 使用 KeyListener，我收到以下事件:
java.awt.event.KeyEvent[KEY_PRESSED,keyCode=16,keyText=Shift,keyChar=Undefined keyChar,modifiers=Shift,extModifiers=Shift,keyLocation=KEY_LOCATION_LEFT,rawCode=16,primaryLevelUnicode=0,scancode=42,extendedKeyCode=0x10] on frame0
java.awt.event.KeyEvent[KEY_PRESSED,keyCode=50,keyText=2,keyChar='"',modifiers=Shift,extModifiers=Shift,keyLocation=KEY_LOCATION_STANDARD,rawCode=50,primaryLevelUnicode=50,scancode=3,extendedKeyCode=0x32] on frame0
java.awt.event.KeyEvent[KEY_TYPED,keyCode=0,keyText=Unknown keyCode: 0x0,keyChar='"',modifiers=Shift,extModifiers=Shift,keyLocation=KEY_LOCATION_UNKNOWN,rawCode=0,primaryLevelUnicode=0,scancode=0,extendedKeyCode=0x0] on frame0
java.awt.event.KeyEvent[KEY_RELEASED,keyCode=16,keyText=Shift,keyChar=Undefined keyChar,keyLocation=KEY_LOCATION_LEFT,rawCode=16,primaryLevelUnicode=0,scancode=42,extendedKeyCode=0x10] on frame0
java.awt.event.KeyEvent[KEY_RELEASED,keyCode=50,keyText=2,keyChar='"',keyLocation=KEY_LOCATION_STANDARD,rawCode=50,primaryLevelUnicode=50,scancode=3,extendedKeyCode=0x32] on frame0
我想创建一个方法，将 " 作为 char 参数，它会返回上面列出的 KeyEvents 数组。
我的问题是:
在 KEY_PRESSED 和 KEY_RELEASED 事件中，keyChar='"' 表示被按下的字符 (")，但是 keyCode=50 指的是“未移位”的 ASCII 值(又名 2)。我需要知道如何仅从 " 字符获取此非移位值。
对于不同的键盘布局，这个非移位值也会不同。例如，美国 ANSI 布局需要 Shift+' 来键入 " 键，这意味着 keyCode 将是 39 而不是 50。
在某些键盘布局上，需要使用 Shift 键才能键入某个键，但在其他键盘布局上则不需要。例如，# 字符在美国 ANSI 键盘上需要 Shift+3，但在英国 ISO 键盘上不需要按 shift 键。我需要知道我是否应该模拟 shift 按下/释放事件并提供 shift 修饰符。
任何有关如何解决这些问题的见解都将不胜感激。我还应该注意，在我的情况下不能使用 Robot 类。
最佳答案
没有“简单”的方法可以将虚拟键转换为实际键序列或再转换回来，至少我找不到。
调度关键事件的两种主要方式是通过 java.awt.Robot 或直接通过系统事件队列。您要使用哪个取决于您要实现的目标。
组件通常无法区分从键盘发送的击键和您自己生成的击键。
下面的示例比较复杂，很抱歉，我没有找到更好的方法来实现我需要的要求。
public class TestKeyEvents {
public static void main(String[] args) {
new TestKeyEvents();
}
public TestKeyEvents() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception ex) {
}
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
new Thread(new KeyDispatcher()).start();
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new BorderLayout());
JTextArea area = new JTextArea(10, 30);
area.setWrapStyleWord(true);
area.setLineWrap(true);
add(area);
}
}
public class KeyDispatcher implements Runnable {
@Override
public void run() {
try {
Thread.sleep(1000);
} catch (InterruptedException ex) {
}
dispatchKeyEventsViaEventQueue();
dispatchKeyEventsViaRobot();
}
protected void dispatchKeyEventsViaEventQueue() {
if (EventQueue.isDispatchThread()) {
String text = "This is a key sequence dispatched via the event queue\n";
KeySequence keySequence = getKeySequence(text);
List<KeyEvent> events = new ArrayList<>();
List<Integer> modifers = new ArrayList<>();
for (Key key : keySequence) {
events.clear();
System.out.println(key);
switch (key.getStrokeType()) {
case Press:
switch (key.getKeyCode()) {
case KeyEvent.VK_SHIFT:
case KeyEvent.VK_ALT:
case KeyEvent.VK_CONTROL:
case KeyEvent.VK_META:
if (!modifers.contains(key.getKeyCode())) {
modifers.add(key.getKeyCode());
}
break;
default:
events.add(new KeyEvent(new JPanel(), KeyEvent.KEY_PRESSED, System.currentTimeMillis(), getModifiers(modifers), key.getKeyCode(), key.getKeyChar()));
break;
}
break;
case Release:
switch (key.getKeyCode()) {
case KeyEvent.VK_SHIFT:
case KeyEvent.VK_ALT:
case KeyEvent.VK_CONTROL:
case KeyEvent.VK_META:
if (!modifers.contains(key.getKeyCode())) {
modifers.remove(key.getKeyCode());
}
break;
default:
events.add(new KeyEvent(new JPanel(), KeyEvent.KEY_RELEASED, System.currentTimeMillis(), getModifiers(modifers), key.getKeyCode(), key.getKeyChar()));
break;
}
break;
case Type:
events.add(new KeyEvent(new JPanel(), KeyEvent.KEY_PRESSED, System.currentTimeMillis(), getModifiers(modifers), key.getKeyCode(), key.getKeyChar()));
events.add(new KeyEvent(new JPanel(), KeyEvent.KEY_RELEASED, System.currentTimeMillis(), getModifiers(modifers), key.getKeyCode(), key.getKeyChar()));
events.add(new KeyEvent(new JPanel(), KeyEvent.KEY_TYPED, System.currentTimeMillis(), getModifiers(modifers), KeyEvent.VK_UNDEFINED, key.getKeyChar()));
break;
}
for (KeyEvent evt : events) {
Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(evt);
}
}
} else {
try {
SwingUtilities.invokeAndWait(new Runnable() {
@Override
public void run() {
dispatchKeyEventsViaEventQueue();
}
});
} catch (Exception exp) {
exp.printStackTrace();
}
}
}
protected void dispatchKeyEventsViaRobot() {
try {
Robot robot = new Robot();
String text = "This is a key sequence dispatched via java.awt.Robot\n";
KeySequence keySequence = getKeySequence(text);
List<KeyEvent> events = new ArrayList<>();
for (Key key : keySequence) {
events.clear();
System.out.println(key);
switch (key.getStrokeType()) {
case Press:
robot.keyPress(key.getKeyCode());
break;
case Release:
robot.keyRelease(key.getKeyCode());
break;
case Type:
robot.keyPress(key.getKeyCode());
robot.keyRelease(key.getKeyCode());
break;
}
}
} catch (AWTException exp) {
exp.printStackTrace();
}
}
}
protected int getModifiers(List<Integer> mods) {
int result = 0;
for (int mod : mods) {
result &= mod;
}
return result;
}
public static class Key {
public enum StrokeType {
Type,
Press,
Release
}
private StrokeType strokeType;
private int keyCode;
private char keyChar;
public Key(StrokeType type, int keyCode, char keyChar) {
this.strokeType = type;
this.keyCode = keyCode;
this.keyChar = keyChar;
}
public StrokeType getStrokeType() {
return strokeType;
}
public int getKeyCode() {
return keyCode;
}
public char getKeyChar() {
return keyChar;
}
@Override
public String toString() {
return getStrokeType().name() + " " + getKeyChar() + " (" + getKeyCode() + ")";
}
}
public static KeySequence getKeySequence(String text) {
KeySequence ks = new KeySequence();
for (char c : text.toCharArray()) {
addKeySequence(ks, c);
}
return ks;
}
public static void addKeySequence(KeySequence ks, char character) {
switch (character) {
case 'a':
ks.type(KeyEvent.VK_A, character);
break;
case 'b':
ks.type(KeyEvent.VK_B, character);
break;
case 'c':
ks.type(KeyEvent.VK_C, character);
break;
case 'd':
ks.type(KeyEvent.VK_D, character);
break;
case 'e':
ks.type(KeyEvent.VK_E, character);
break;
case 'f':
ks.type(KeyEvent.VK_F, character);
break;
case 'g':
ks.type(KeyEvent.VK_G, character);
break;
case 'h':
ks.type(KeyEvent.VK_H, character);
break;
case 'i':
ks.type(KeyEvent.VK_I, character);
break;
case 'j':
ks.type(KeyEvent.VK_J, character);
break;
case 'k':
ks.type(KeyEvent.VK_K, character);
break;
case 'l':
ks.type(KeyEvent.VK_L, character);
break;
case 'm':
ks.type(KeyEvent.VK_M, character);
break;
case 'n':
ks.type(KeyEvent.VK_N, character);
break;
case 'o':
ks.type(KeyEvent.VK_O, character);
break;
case 'p':
ks.type(KeyEvent.VK_P, character);
break;
case 'q':
ks.type(KeyEvent.VK_Q, character);
break;
case 'r':
ks.type(KeyEvent.VK_R, character);
break;
case 's':
ks.type(KeyEvent.VK_S, character);
break;
case 't':
ks.type(KeyEvent.VK_T, character);
break;
case 'u':
ks.type(KeyEvent.VK_U, character);
break;
case 'v':
ks.type(KeyEvent.VK_V, character);
break;
case 'w':
ks.type(KeyEvent.VK_W, character);
break;
case 'x':
ks.type(KeyEvent.VK_X, character);
break;
case 'y':
ks.type(KeyEvent.VK_Y, character);
break;
case 'z':
ks.type(KeyEvent.VK_Z, character);
break;
case 'A':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_A, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'B':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_B, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'C':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_C, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'D':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_D, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'E':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_E, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'F':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_F, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'G':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_G, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'H':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_H, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'I':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_I, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'J':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_J, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'K':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_K, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'L':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_L, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'M':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_M, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'N':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_N, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'O':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_O, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'P':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_P, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'Q':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_Q, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'R':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_R, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'S':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_S, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'T':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_T, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'U':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_U, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'V':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_V, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'W':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_W, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'X':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_X, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'Y':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_Y, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case 'Z':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_Z, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case '`':
ks.type(KeyEvent.VK_BACK_QUOTE, character);
break;
case '0':
ks.type(KeyEvent.VK_0, character);
break;
case '1':
ks.type(KeyEvent.VK_1, character);
break;
case '2':
ks.type(KeyEvent.VK_2, character);
break;
case '3':
ks.type(KeyEvent.VK_3, character);
break;
case '4':
ks.type(KeyEvent.VK_4, character);
break;
case '5':
ks.type(KeyEvent.VK_5, character);
break;
case '6':
ks.type(KeyEvent.VK_6, character);
break;
case '7':
ks.type(KeyEvent.VK_7, character);
break;
case '8':
ks.type(KeyEvent.VK_8, character);
break;
case '9':
ks.type(KeyEvent.VK_9, character);
break;
case '-':
ks.type(KeyEvent.VK_MINUS, character);
break;
case '=':
ks.type(KeyEvent.VK_EQUALS, character);
break;
case '~':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_BACK_QUOTE, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case '!':
ks.type(KeyEvent.VK_EXCLAMATION_MARK, character);
break;
case '@':
ks.type(KeyEvent.VK_AT, character);
break;
case '#':
ks.type(KeyEvent.VK_NUMBER_SIGN, character);
break;
case '$':
ks.type(KeyEvent.VK_DOLLAR, character);
break;
case '%':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_5, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case '^':
ks.type(KeyEvent.VK_CIRCUMFLEX, character);
break;
case '&':
ks.type(KeyEvent.VK_AMPERSAND, character);
break;
case '*':
ks.type(KeyEvent.VK_ASTERISK, character);
break;
case '(':
ks.type(KeyEvent.VK_LEFT_PARENTHESIS, character);
break;
case ')':
ks.type(KeyEvent.VK_RIGHT_PARENTHESIS, character);
break;
case '_':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_MINUS, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case '+':
ks.type(KeyEvent.VK_PLUS, character);
break;
case '\t':
ks.type(KeyEvent.VK_TAB, character);
break;
case '\n':
ks.type(KeyEvent.VK_ENTER, character);
break;
case '[':
ks.type(KeyEvent.VK_OPEN_BRACKET, character);
break;
case ']':
ks.type(KeyEvent.VK_CLOSE_BRACKET, character);
break;
case '\\':
ks.type(KeyEvent.VK_BACK_SLASH, character);
break;
case '{':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_OPEN_BRACKET, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case '}':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_CLOSE_BRACKET, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case '|':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_BACK_SLASH, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case ';':
ks.type(KeyEvent.VK_SEMICOLON, character);
break;
case ':':
ks.type(KeyEvent.VK_COLON, character);
break;
case '\'':
ks.type(KeyEvent.VK_QUOTE, character);
break;
case '"':
ks.type(KeyEvent.VK_QUOTEDBL, character);
break;
case ',':
ks.type(KeyEvent.VK_COMMA, character);
break;
case '<':
ks.type(KeyEvent.VK_LESS, character);
break;
case '.':
ks.type(KeyEvent.VK_PERIOD, character);
break;
case '>':
ks.type(KeyEvent.VK_GREATER, character);
break;
case '/':
ks.type(KeyEvent.VK_SLASH, character);
break;
case '?':
ks.press(KeyEvent.VK_SHIFT, '\0');
ks.type(KeyEvent.VK_SLASH, character);
ks.release(KeyEvent.VK_SHIFT, '\0');
break;
case ' ':
ks.type(KeyEvent.VK_SPACE, character);
break;
default:
throw new IllegalArgumentException("Cannot type character " + character);
}
}
public static class KeySequence implements Iterable<Key> {
private List<Key> keys;
public KeySequence() {
keys = new ArrayList<>(25);
}
public void type(int keyCode, char keyChar) {
keys.add(new Key(Key.StrokeType.Type, keyCode, keyChar));
}
public void press(int keyCode, char keyChar) {
keys.add(new Key(Key.StrokeType.Press, keyCode, keyChar));
}
public void release(int keyCode, char keyChar) {
keys.add(new Key(Key.StrokeType.Release, keyCode, keyChar));
}
public Iterator<Key> iterator() {
return keys.iterator();
}
}
}
关于java - 如何完美模拟 KeyEvents？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14572270/
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在选择我想要运行操作的频率时，唯一的选项是“每天”、“每小时”和“每10分钟”。谢谢!我想为我的Rails3.1应用程序运行调度程序。 最佳答案 这不是一个优雅的解决方案，但您可以安排它每天运行，并在实际开始工作之前检查日期是否为当月的第一天。 关于ruby-如何每月在Heroku运行一次Scheduler插件？，我们在StackOverflow上找到一个类似的问题： https://stackoverflow.com/questions/8692687/
我有一个对象has_many应呈现为xml的子对象。这不是问题。我的问题是我创建了一个Hash包含此数据，就像解析器需要它一样。但是rails自动将整个文件包含在.........我需要摆脱type="array"和我该如何处理？我没有在文档中找到任何内容。 最佳答案 我遇到了同样的问题；这是我的XML:我在用这个:entries.to_xml将散列数据转换为XML，但这会将条目的数据包装到中所以我修改了:entries.to_xml(root:"Contacts")但这仍然将转换后的XML包装在“联系人”中，将我的XML代码修改为
我有一大串格式化数据(例如JSON)，我想使用Psychinruby同时保留格式转储到YAML。基本上，我希望JSON使用literalstyle出现在YAML中:---json:|{"page":1,"results":["item","another"],"total_pages":0}但是，当我使用YAML.dump时，它不使用文字样式。我得到这样的东西:---json:!"{\n\"page\":1,\n\"results\":[\n\"item\",\"another\"\n],\n\"total_pages\":0\n}\n"我如何告诉Psych以想要的样式转储标量？解