似乎没有办法断开套接字而不会在服务器端造成连接重置错误。
我在测试版应用中使用com.codename1.io.SocketConnection和private SpanLabel lblStatus;
private SpanLabel lblIncoming;
private CustomSocketConnection con;
private Thread tIncoming;
public ConnectForm() {
con = getSocketConnection();
Button btnConnect = getConnectButton();
Button btnDisconnect = getDisconnectButton();
Button btnSendMessage = getSendMessageButton();
lblStatus = getInfoLabel();
lblIncoming = getIncomingLabel();
setLayout(new BoxLayout(BoxLayout.Y_AXIS));
addComponent(btnConnect);
addComponent(btnDisconnect);
addComponent(btnSendMessage);
addComponent(lblStatus);
addComponent(lblIncoming);
}
private Button getConnectButton() {
Button btn = new Button("Connect (localhost)");
btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
Socket.connect("localhost", 8687, con);
}
});
return btn;
}
private Button getDisconnectButton() {
Button btn = new Button("Disconnect");
btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
//??? I don't know how to do this
try {
tIncoming.join();
} catch (Exception e) {
e.printStackTrace();
tIncoming.interrupt();
}
}
});
return btn;
}
private Button getSendMessageButton() {
Button btn = new Button("Send Message");
btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
try {
con.os.write("Hello".getBytes());
con.os.write(Integer.parseInt("04", 16)); //end of transmit
con.os.flush();
lblStatus.setText("Message Sent");
} catch (Exception e) {
e.printStackTrace();
}
}
});
return btn;
}
private SpanLabel getInfoLabel() {
return new SpanLabel("Disconnected");
}
private SpanLabel getIncomingLabel() {
return new SpanLabel("...");
}
private CustomSocketConnection getSocketConnection() {
return new CustomSocketConnection();
}
class CustomSocketConnection extends SocketConnection {
public OutputStream os;
public InputStream is;
@Override
public void connectionError(int errorCode, String message) {
lblStatus.setText("Error Connecting. ErrorCode: " + errorCode + " Message: " + message);
}
@Override
public void connectionEstablished(InputStream is, OutputStream os) {
lblStatus.setText("Connected :)");
this.is = is;
this.os = os;
spawnIncomingMessageWatcher();
}
}
private void spawnIncomingMessageWatcher() {
tIncoming = new Thread(new Runnable() {
public void run() {
String s = "";
int eot = Integer.parseInt("04", 16);
while (con.isConnected()) {
try {
int temp;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while (((temp = con.is.read()) != -1) && (temp != eot)) {
baos.write(temp);
}
lblIncoming.setText(new String(baos.toByteArray()));
Thread.sleep(2000);
} catch (Exception e) {
e.printStackTrace();
}
}
}
});
tIncoming.start();
}
实现。我的代码如下：
getDisconnectButton()使用SocketConnection方法，我不知道如何正确地断开与服务器的连接，因为{{1}}对象似乎没有适当的方法。
答案 0 :(得分：2)
如果在Input-或OutputStream上调用close（），则关闭Socket，代码来自Socket.SocketInputStream类link。
public void close() throws IOException {
closed = true;
if(Util.getImplementation().isSocketConnected(impl)) {
Util.getImplementation().disconnectSocket(impl);
con.setConnected(false);
}
}
首先向服务器发送关闭指令，然后关闭流。
希望这有帮助，