javaSocket与C通信

前段时间写了个web端与C服务端之间的通信不过用的是短连接非堵塞的方式，一直想使用长连接，使tomcat启动的时候就和C服务端进行通信，但是一直没找到方法希望je的朋友能给点思路。先来看我现在的具体实现
通信的核心类
public class newsSockBase
{
    private SocketChannel sc;
    private final int MAX_LENGTH = 8192;
    private ByteBuffer r_buff ;
    private ByteBuffer w_buff ;
    private static String host ;
    private static int port;

    int     sendBufTotalLen;
    int     sendBufLen;
    int     sendBufStart;
    byte[] sendBuf;

    int     recvBufTotalLen;
    int     recvBufLen;
    int     recvBufStart;
    byte[] recvBuf;

    int     timeout;
    String msg;

    public newsSockBase()
    {
        r_buff = ByteBuffer.allocate(MAX_LENGTH);
        w_buff = ByteBuffer.allocate(MAX_LENGTH);

        sendBufTotalLen = MAX_LENGTH;
        sendBufLen = sendBufStart = 0;
        sendBuf = new byte[MAX_LENGTH];

        recvBufTotalLen = MAX_LENGTH;
        recvBufLen = recvBufStart = 0;
        recvBuf = new byte[MAX_LENGTH];

        timeout = 6;
    }

    public void setIPandPort(String str,int pt)
    {
        host = str;
        port = pt;
    }

    //这两个函数一定要注意形参是基类而实际传入的参数是子类，到时候也是调用子类的参数来做
    public void getBufFrompara(InewsDetail nD)
    {
        int len = nD.encode(sendBuf, sendBufStart, sendBufTotalLen-sendBufStart-sendBufLen);

        sendBufLen += len;

    }

    public int decodeBufToPara(InewsDetail nD)
    {
        int len = nD.decode(recvBuf, recvBufStart, recvBufLen);
        if (len>0)   //解码正确的时候才做
        {
            recvBufLen -= len;
            recvBufStart += len;
        }

        return len;
    }

    public void start(InewsDetail nD)
    {

        //这里需要先根据传入的参数来
        getBufFrompara(nD);

        try {
            InetSocketAddress addr = new InetSocketAddress(host, port);
            // 生成一个socketchannel
            sc = SocketChannel.open();
            sc.configureBlocking(false);//
            // 连接到server
            sc.connect(addr);
            while (!sc.finishConnect())
                ;
            System.out.println("connection has been established!…");

           // while (true)
            {
                // 回射消息    // 复位，清空
                w_buff.clear();
                w_buff.put(sendBuf,sendBufStart,sendBufLen);
                w_buff.flip();   // 转到最开始

                // 发送消息
                while (w_buff.hasRemaining())
                    sc.write(w_buff);
                w_buff.clear();

补充：软件开发 , Java ,