Smack 是一個(gè)用于處理 XMPP(可擴(kuò)展消息與出席協(xié)議)的 Java 庫。處理連接斷開的方法如下:
首先,確保在項(xiàng)目的 pom.xml
文件中添加了 Smack 庫的依賴:
<dependency>
<groupId>org.igniterealtime.smack</groupId>
<artifactId>smack-java7</artifactId>
<version>4.4.2</version>
</dependency>
<dependency>
<groupId>org.igniterealtime.smack</groupId>
<artifactId>smack-tcp</artifactId>
<version>4.4.2</version>
</dependency>
<dependency>
<groupId>org.igniterealtime.smack</groupId>
<artifactId>smack-extensions</artifactId>
<version>4.4.2</version>
</dependency>
使用 Smack 庫建立 XMPP 連接:
import org.jivesoftware.smack.Connection;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.tcp.XMPPTCPConnection;
import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;
public class SmackDemo {
public static void main(String[] args) {
ConnectionConfiguration config = new XMPPTCPConnectionConfiguration.Builder("example.com")
.setUsernameAndPassword("username", "password")
.setSecurityMode(ConnectionConfiguration.SecurityMode.disabled)
.build();
Connection connection = new XMPPTCPConnection(config);
try {
connection.connect();
} catch (XMPPException e) {
e.printStackTrace();
}
}
}
為了處理連接斷開,需要實(shí)現(xiàn) Connection.Listener
接口并重寫 connectionClosed()
方法。例如:
import org.jivesoftware.smack.Connection;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.tcp.XMPPTCPConnection;
import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;
public class SmackDemo {
public static void main(String[] args) {
ConnectionConfiguration config = new XMPPTCPConnectionConfiguration.Builder("example.com")
.setUsernameAndPassword("username", "password")
.setSecurityMode(ConnectionConfiguration.SecurityMode.disabled)
.build();
Connection connection = new XMPPTCPConnection(config);
connection.addAsyncStanzaListener(new StanzaTypeFilter(Message.class), new MessageListener());
connection.addAsyncStanzaListener(new StanzaTypeFilter(Presence.class), new PresenceListener());
try {
connection.connect();
} catch (XMPPException e) {
e.printStackTrace();
}
}
static class MessageListener implements StanzaListener {
@Override
public void processStanza(Stanza stanza) {
// 處理消息
}
}
static class PresenceListener implements StanzaListener {
@Override
public void processStanza(Stanza stanza) {
// 處理在線狀態(tài)
}
}
public static class MyConnectionListener implements Connection.Listener {
@Override
public void connectionClosed() {
System.out.println("連接已斷開");
// 在這里處理連接斷開后的邏輯,例如重新連接或清理資源
}
@Override
public void connectionFailed(Exception e) {
System.out.println("連接失敗");
e.printStackTrace();
}
}
}
在這個(gè)例子中,我們創(chuàng)建了一個(gè)名為 MyConnectionListener
的類,實(shí)現(xiàn)了 Connection.Listener
接口。我們重寫了 connectionClosed()
方法,當(dāng)連接斷開時(shí),這個(gè)方法會(huì)被調(diào)用。在這個(gè)方法里,你可以處理連接斷開后的邏輯,例如重新連接或清理資源。