public String send(String Command) throws Exception {
        String ret="";
        Socket soc = new Socket(getURL(), getPORT());//getURL=192.168.1.168；getPORT=4016
        
        System.out.println("Connect Telnet:" + getURL() + "-" + getPORT());
        
        DataInputStream din = new DataInputStream(soc.getInputStream());
        
        DataOutputStream dout = new DataOutputStream(soc.getOutputStream());
        
        dout.writeUTF(Command);
        System.out.println("send:" + Command);
            int re=0;
        while (re != -1) {
            re = din.readByte();//read（）；readInt（）；readUTF（）；方法都试了结果都不对
            System.out.println("int" + re);
            Character c = new Character((char) re);//这就开始乱码了
            System.out.println("char:" + c);
            ret = ret.concat(c.toString());
        }
            
        
        System.out.println("reply:" + ret);
        din.close();
        dout.close();
        soc.close();
        return ret;
    }

StringBuffer sb = new StringBuffer();
        int len = 0;
        byte[] buffer = new byte[4096];
        while ((len = din.read(buffer)) != -1) {
            sb.append(new String(buffer,0,len,"UTF-8"));
        }
        System.out.println(sb.toString());