服务器问题

Question

如下一段程序，我怎么才能做到输入exit退出,输入别的没反应!!谢谢各位大大~
       try
        {
            ConnectionDB.getConnection();
            while(true)
            {                
                System.out.println("正在启动服务..."); 
                controller.start();
                    
                //State == 线程是否正常运行  getState -- 获得服务器的核心处理线程的状态
                while (Thread.State.RUNNABLE != controller.getState())
                {
                }
                System.out.println("服务启动完毕");
                String command = reader.readLine();
                if ("exit".equals(command))
                {
                    controller.interrupt();
                    break;
                }
                else
                {
                    continue;
                }
            }
        } catch (Exception ex) {
            System.out.println("main:" + ex);
        }
        System.out.println("退出");
        System.exit(0);
    }