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import  java.util.Objects;
 
import  org.jivesoftware.smack.AbstractXMPPConnection;
import  org.jivesoftware.smack.ConnectionConfiguration.SecurityMode;
import  org.jivesoftware.smack.chat.Chat;
import  org.jivesoftware.smack.chat.ChatManager;
import  org.jivesoftware.smack.chat.ChatManagerListener;
import  org.jivesoftware.smack.chat.ChatMessageListener;
import  org.jivesoftware.smack.packet.Message;
import  org.jivesoftware.smack.tcp.XMPPTCPConnection;
import  org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;
 
public  class  SmackClient {
 
     public  static  void  main(String[] args) {
         try  {
             String serviceName =  "XXXXXX" ;
             String host =  "192.168.0.1" ;
             int  port =  5222 ;
 
             String myUsername =  "user1" ;
             String myPassword =  "123456" ;
 
             String friendUsername =  "user2" ;
 
             XMPPTCPConnectionConfiguration.Builder builder = XMPPTCPConnectionConfiguration.builder();
             builder.setUsernameAndPassword(myUsername, myPassword);
             builder.setServiceName(serviceName);
             builder.setHost(host);
             builder.setPort(port);
             builder.setSecurityMode(SecurityMode.disabled);
             builder.setDebuggerEnabled( false );
 
             XMPPTCPConnectionConfiguration config = builder.build();
 
             AbstractXMPPConnection c =  new  XMPPTCPConnection(config);
 
             c.connect();
             c.login();
             System.out.println( "Authenticated = "  + c.isAuthenticated());
 
             ChatManager chatmanager = ChatManager.getInstanceFor(c);
             Chat newChat = chatmanager.createChat(friendUsername +  "@"  + serviceName);
 
             final  ChatMessageListener messageListener =  new  ChatMessageListener() {
                 @Override
                 public  void  processMessage(Chat arg0, Message message) {
                     String messageBody = message.getBody();
                     if  (Objects.nonNull(messageBody)) {
                         try  {
                             arg0.sendMessage( "你刚说的是:"  + messageBody);
                         }  catch  (Exception e) {
                         }
                     }
                 }
             };
 
             ChatManagerListener chatManagerListener =  new  ChatManagerListener() {
                 @Override
                 public  void  chatCreated(Chat chat,  boolean  arg1) {
                     chat.addMessageListener(messageListener);
                 }
             };
             chatmanager.addChatListener(chatManagerListener);
 
             try  {
                 newChat.sendMessage( "我来咯" );
             }  catch  (Exception e) {
                 System.out.println( "Error Delivering block" );
             }
 
             while  ( true )
                 ;
         }  catch  (Exception e) {
             e.printStackTrace();
         }
     }
}

附件为所需要的所有类库Jar包。