j2me网络实战指南

  public String requestGET(String URLString,String URL) throws IOException{
    // =============================================================
    // URLString是HTTP地址，URL为后面的参数
    // 这里的例子是发送用的用户名和密码到服务器端进行用户验证
    // 比如 String URLString = "http://192.168.0.1:8080/login.jsp"
    //           String URL = "?Name="+this.txtName+"&Pass="+this.txtPass
    // =============================================================
    
    HttpConnection hpc = null;
    DataInputStream dis = null;

    boolean newline = false;

    String content = "";
    try{
      // ===========================================================
      // 建立连接
      // ===========================================================
      hpc = (HttpConnection)Connector.open(URLString+URL);
      hpc.setRequestMethod(HttpConnection.GET);

      dis =  new DataInputStream(hpc.openInputStream());

      int character;
      // ===========================================================
      // 读取返回的HTTP内容
      // ===========================================================
      while((character = dis.read()) != -1){
        if((char)character == '//'){
          newline = true;
          continue;
        }
        else{
          if((char)character =='n'&& newline){
            content +="/n";
            newline = false;
          }
          else if(newline){
            content +="//" +(char)character;
            newline = false;
          }
          else{
            content +=(char)character;
            newline = false;
          }
        }
      }
    }
    catch(IOException e){
      System.out.PRint("ERROR:"+e);
    }
    finally{
      if(hpc != null){
        hpc.close();
        hpc = null;
      }
      if(dis != null){
        dis.close();
      }
    }
    // ===============================================================
    // 由于内容可能有中文，所以在接受到信息后要对内容进行字符集的转换
    // ===============================================================
    content = (unicodeTogb2312(content)).trim();
    return content;
  }

public static String unicodeTogb2312(String s){
    if (s==null){ return ""; }
    if (s.equals("")){ return s; }
    try{
      return new String(s.getBytes("ISO8859_1"),"gb2312");
     }
    catch(Exception uee){
      return s;
     }
  }

  
  public boolean SocketConn(String s) throws IOException{
    // =============================================================
    // s是Socket连接字符串
    // 这里的例子是发送用的用户名和密码到服务器端进行用户验证
    // 比如 String s = "socket://192.168.0.1:6666"
    // =============================================================
    
    private StreamConnection conServer;
    private String strServerAddr;
    private boolean bConnected;
    
    conServer = null;
    strServerAddr = s; // 连接地址
    bConnected = false; // 连接状态
    
        try
        {
            conServer = (StreamConnection)Connector.open(strServerAddr);
        }
        catch(Exception exception)
        {
            System.out.println("Connect server error");
            bConnected = false;
            return false;
        }
        bConnected = true;
        System.out.println("connect ok!");
        return true;
  }

  ..........
  try{
    // 建立端口为6666的socket服务器
    ServerSocketConnection SocketSer;
    SocketSer = (ServerSocketConnection)Connector.open("socket://:6666");
    
    // 等待客户端连接
    SocketConnection sc;
    // 如有连接，则新增一个线程对连接进行处理
    sc = (SocketConnection)SocketSer.acceptAndOpen();
    ..........
    while(true){
      // 对sc的InputStream和OutPutStream进行处理

    }
  }
  ..........

  protected boolean sendData(byte abyte0［］)//自己替换［］
    {
        System.out.println("send :" + bConnected);
        // 判断连接情况
        if(!bConnected)
            return false;
        OutputStream outputstream = null;
        try
        {
            outputstream = conServer.openOutputStream();
            // 写信息到outputstream中
            outputstream.write(abyte0);
            // 我的理解是强制送出所有已经写了的信息
            outputstream.flush();
            outputstream.close();
        }
        catch(Exception exception)
        {
            System.out.println("Send Data error");
            bConnected = false;
            try
            {
                if(outputstream != null)
                    outputstream.close();
                // 调用断开连接的函数
                disconnect();
            }
            catch(Exception exception1) { }
            return false;
        }
        return true;
    }