import org.spacehq.mc.protocol.packet.ingame.client.ClientChatPacket; //导入依赖的package包/类
public void onPacket(PacketReceivedEvent event) {
	// if the packet is a chat packet, handle it!
	if (event.getPacket() instanceof ClientChatPacket) {
		ClientChatPacket packet = event.getPacket();
		String message = packet.getMessage();

		GameProfile profile = event.getSession().getFlag(MinecraftConstants.PROFILE_KEY);
		System.out.println("<" + profile.getName() + "> " + packet.getMessage());

		// Check if it was a command or a chat message
		if (message.substring(0, 1).equals("/")) {
			NetherPlayer player = NetherServer.players.get(event.getSession());
			NetherServer.commandHandler.runCommand(player, message);
		} else {
			// let every other user on the server know that someone has just
			// chatted
			NetherServer.server.getSessions().forEach((session) -> session
					.send(new ServerChatPacket("<" + profile.getName() + "> " + packet.getMessage())));
		}
	}
}
 

import org.spacehq.mc.protocol.packet.ingame.client.ClientChatPacket; //导入依赖的package包/类
@Override
public void keyTyped(char c) {
    if(c == 8 && currentMessage.length() > 0) { // backspace
        currentMessage = currentMessage.substring(0, currentMessage.length()-1);
        return;
    }
    if(c == 13 && currentMessage.length() > 0) { // enter
        RadixClient.getInstance().getMinecraftConn().getClient().getSession().send(new ClientChatPacket(currentMessage));
        currentMessage = "";
        RadixClient.getInstance().setCurrentScreen(RadixClient.getInstance().getHud());
        return;
    }
    if(currentMessage.length() < 100 && c >= 32 && c <= 126) { // Ascii printable range
        currentMessage += c;
    }
}
 

import org.spacehq.mc.protocol.packet.ingame.client.ClientChatPacket; //导入依赖的package包/类
@PacketHandler
public void onServerChat(PCSession session, ClientChatPacket packet) {
    final String mesaage = packet.getMessage();
    final GameProfile profile = session.getFlag(MinecraftConstants.PROFILE_KEY);
    boolean command = mesaage.startsWith("/");
    final String outgoing = "<" + profile.getName() + "> " + mesaage;
    if (!command) {
        for (Session activeSession : SpongeGame.instance.getServer().getNetwork().getSessions()) {
            activeSession.send(new ServerChatPacket(outgoing, MessageType.CHAT));
        }
    } else {
        session.send(new ServerChatPacket(outgoing, MessageType.CHAT));
    }

    if (command) {
        SpongeGame.logger.info("{} issued command: {}", profile.getName(), mesaage);
    } else {
        SpongeGame.logger.info(outgoing);
    }
}
 

import org.spacehq.mc.protocol.packet.ingame.client.ClientChatPacket; //导入依赖的package包/类
public void onPacket(PacketReceivedEvent event) {
	if (event.getPacket() instanceof ClientChatPacket) {
		ClientChatPacket packet = event.getPacket();
		GameProfile profile = event.getSession().getFlag(MinecraftConstants.PROFILE_KEY);
		System.out.println("<" + profile.getName() + "> " + packet.getMessage());
		MainMain.server.getSessions().forEach((session) -> session
				.send(new ServerChatPacket("<" + profile.getName() + "> " + packet.getMessage())));

	}
}
 

import org.spacehq.mc.protocol.packet.ingame.client.ClientChatPacket; //导入依赖的package包/类
public void chat( String message )
{
	this.conn.getSession().send( new ClientChatPacket( message ) );
}