即时通信XMPP协议示例程序（可与QQ,MSN等互通）

运行环境：JDK1.4+

第三方包：Smack（Openfire服务器官方提供）

XMPP服务器：Openfire 3.6

特点：可直接与QQ，MSN，Gtalk等账号绑定，可直接与QQ，Gtalk，MSN等聊天工具互通

通过这个Java程序，让大家首先先了解一下基于XMPP协议的即时通信的基本原理，希望大家通过界面上的报文了解通信的远离，我先抛砖引玉一下，

 

核心源码：

package com.nbhj.im;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.Roster;
import org.jivesoftware.smack.RosterEntry;
import org.jivesoftware.smack.RosterGroup;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;



public class IMServer {

	private ConnectionConfiguration connectionConfig;
	private XMPPConnection connection;
	private Roster roster;
	private boolean loginState;
	private Listener listener;
	/**
	 * 构造 IMServer(serviceName)
	 */
	public IMServer(String serviceName) {
		connectionConfig = new ConnectionConfiguration(serviceName);
		connection = new XMPPConnection(connectionConfig);
		listener=new Listener();
		try {
			connection.connect();
		} catch (XMPPException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 构造 IMServer(host,port)
	 */
	public IMServer(String host, String port) {

		connectionConfig = new ConnectionConfiguration(host, Integer
				.parseInt(port));
		connection = new XMPPConnection(connectionConfig);
		listener=new Listener();
		try {
			connection.connect();
		} catch (XMPPException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 构造 IMServer(host port serviceName)
	 */
	public IMServer(String host, int port, String serviceName) {
		connectionConfig = new ConnectionConfiguration(host, port, serviceName);
		connection = new XMPPConnection(connectionConfig);
		listener=new Listener();
		
		try {
			connection.connect();
			
		} catch (XMPPException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 账户登陆 Server
	 * 
	 * @return boolean
	 */
	public boolean loginServer(String userName, String userPswd) {
		try {
			connection.login(userName, userPswd);
			loginState = true;
			roster = connection.getRoster();
			
			listener.regConnectionListener(connection);
			listener.regPackListener(connection);
			listener.onlineServer(connection);
			listener.regRosterListener(roster);
		} catch (XMPPException e) {
			e.printStackTrace();
		}
		return loginState;
	}
	
	

	/**
	 * 注册新账号
	 * 
	 * @return boolean
	 */
	public boolean createAccount(String regUserName, String regUserPswd) {
		try {
			connection.getAccountManager().createAccount(regUserName,
					regUserPswd);
			return true;
		} catch (XMPPException e) {
			e.printStackTrace();
			return false;
		}

	}

	/**
	 * 账户退出 Server
	 * 
	 * @return boolean
	 */
	public boolean logoutServer() {
		if (loginState) {
			connection.disconnect();
			listener.stopOnlineThread();
			loginState = false;
		}
		return !loginState;
	}

	/**
	 * 返回所有用户信息 <RosterEntry>
	 * 
	 * @return List(RosterEntry)
	 */
	public List<RosterEntry> getOnlineEntries() {
		List<RosterEntry> EntriesList = new ArrayList<RosterEntry>();
		Collection<RosterEntry> rosterEntry = roster.getEntries();
		Iterator<RosterEntry> i = rosterEntry.iterator();
		while (i.hasNext()){
		
			EntriesList.add(i.next());
		}
		return EntriesList;
	}
	/**
	 * 返回所有用户信息 <RosterEntry>
	 * 
	 * @return List(RosterEntry)
	 */
	public List<RosterEntry> getAllEntries() {
		List<RosterEntry> EntriesList = new ArrayList<RosterEntry>();
		Collection<RosterEntry> rosterEntry = roster.getEntries();
		Iterator<RosterEntry> i = rosterEntry.iterator();
		while (i.hasNext())
			EntriesList.add(i.next());
		return EntriesList;
	}

	/**
	 * 返回相应(groupName)组里的所有用户<RosterEntry>
	 * 
	 * @return List(RosterEntry)
	 */
	public List<RosterEntry> getEntriesByGroup(String groupName) {
		List<RosterEntry> EntriesList = new ArrayList<RosterEntry>();
		RosterGroup rosterGroup = roster.getGroup(groupName);
		Collection<RosterEntry> rosterEntry = rosterGroup.getEntries();
		Iterator<RosterEntry> i = rosterEntry.iterator();
		while (i.hasNext())
			EntriesList.add(i.next());
		return EntriesList;
	}

	/**
	 * 返回所有组信息 <RosterGroup>
	 * 
	 * @return List(RosterGroup)
	 */
	public List<RosterGroup> getGroups() {
		List<RosterGroup> groupsList = new ArrayList<RosterGroup>();
		Collection<RosterGroup> rosterGroup = roster.getGroups();
		Iterator<RosterGroup> i = rosterGroup.iterator();
		while (i.hasNext())
			groupsList.add(i.next());
		return groupsList;
	}

	/**
	 * @return connection
	 */
	public XMPPConnection getConnection() {
		return connection;
	}

	/**
	 * @return loginState
	 */
	public boolean getLoginState() {
		return loginState;
	}

	/**
	 * @return roster
	 */
	public Roster getRoster() {
		return roster;
	}
}