xmpp协议，smack包连接不上openfire 400 请求报错 

import org.jivesoftware.smack.AbstractXMPPConnection;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.chat.Chat;
import org.jivesoftware.smack.chat.ChatManager;
import org.jivesoftware.smack.chat.ChatMessageListener;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.tcp.XMPPTCPConnection;
import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;

import javax.net.ssl.SSLContext;
import java.security.SecureRandom;

public class testSmack2 {
//host 172.16.9.88
    //serviceName  	sun-d601bacdc00
    public static void main(String[] args) throws Exception {
        //SSLContext sc = SSLContext.getInstance();

        XMPPTCPConnectionConfiguration config = XMPPTCPConnectionConfiguration.builder()
                .setUsernameAndPassword("ding", "123456")
                .setServiceName("sun-d601bacdc00")
                .setHost("172.16.9.88")
                .setPort(5222).setSecurityMode(ConnectionConfiguration.SecurityMode.disabled).setResource("work").build();


        AbstractXMPPConnection conn1 =new XMPPTCPConnection(config);
        conn1.connect();
        conn1.login();
        System.out.println(conn1.getHost());
        System.out.println(conn1.isConnected());
        System.out.println(conn1.getUser());


        Chat chat = ChatManager.getInstanceFor(conn1).createChat("xiaoming@sun-d601bacdc00");

        chat.addMessageListener(new ChatMessageListener() {
            public void processMessage(Chat chat, Message message) {
                System.out.println(message);
            }
        });
        while (true) {
            chat.sendMessage("lalalal");
            Thread.sleep(5000);
        }
    }
}

######是JDK版本问题= = 改成1.8的JDK就好了