flex实现的前台，java实现的服务器端。可以实现单个页面进行聊天-flex to achieve the prospects, java achieve server-side. Can achieve a single page chat

flex和java,打印一维码和二维码，功能简单，使用起来非常方便- Flex and Java, print the one-dimensional code and two-dimensional code, a simple function, it is very convenient to use