（转）JavaFX Script将终结AJAX？还是另一种选择？

ria技术实现都是需要浏览器插件的。包括微软的Silverlight和Adobe Flex。

不过微软以后很可能会在IE中直接支持Silverlight。

关键是jre太大了，安装后占空间太多，不比flashplayer和silverlight，轻量级runtime。

是有这个问题。
sun如果不推出一个轻量级别的jre。javafx推广肯定会受影响。

F3 is now called JavaFX

Sun is planning to release a so-called "Consumer JRE" with JRE 1.6 update release 2. Consumer JRE aims to improve the user experience including smaller download size(2-4M), easier installation and better startup time. JRE 1.6 update release 2 will be out very soon.
Consumer JRE is a trimmed-down jre. Although the initial bundle size is small, after installation, it will be a full-fledged jre on which any standalone application can run.

这个Consumer JRE看来还不错，终于弥补了原来的JRE的缺点。

applet的模式 并不仅仅只是因为要JRE
还有一个重要的原因就是作为view端,它还不够易用,不能像xml/html那样具有可描述性和动态性.

FX的速度还算过得去,很多概念从swing/java2d提取的话,功能和成熟性也应该不在话下.

而flex/openlaszlo是基于script(ECMAScript,ActionScript),显示应该没什么问题,但与后台的交互始终解决不得那么优美.

IMO: (Tring some demo/examples) It really opened my eyes(again), the speed is fair, code style is elegant and clean, since it leverages the Java2D and Swing API's and features a declarative programming model, its functionality should be powerful enough.

Not like flex/openlaszlo, which based on xml, it's somewhat like "declaring script", although xml is popular, but json something like is also elegant and powerful, and more easier.

Since flex/openlaszlo are based on the script(ECMAScript,ActionScript), there are many issues or problems hard to resolve(esp on the server side), e.g. for openlaszlo: It need a delegator to support rpc, multi-request-parameters not supported, cookie not supported directly, parameter bug while invoke the WS. And also with the some tricky techs and lack of sophisticated libaries.

我觉得一个轻量级别的jre实在是太需要了。
平常用java开发一个cs的程序，代码加lib通常不过几M.
而一个1.5版本的jre要71M。太笨重了。

如果说flex/openlaszlo“交互始终解决不得那么优美.”，那么我没看出javafx怎么个那么优美，flex/openlaszlo有httpservice和remoteobject call，而且可以异步操作，怎么叫不优美呢？

如果RIA的前端和后端使用不同的平台，数据类型转换将是个大问题。这一点JavaFX有一个和Java对象直接转换的优点。