1、错误情况：HttpServletResponse response = ServletActionContext.getResponse();这句报红叉
2、提示：The type javax.servlet.http.HttpServletResponse cannot be resolved. It is indirectly referen艘早祓胂ced from required .class files，并要求configuration build path
3、解决办法：点击提示中的configuration build path（或者右键项目，点击Build Path->configuration build path），打开build path界面后，选择Libraries选项卡，并单击Add Library，如图
4、选择MyEclipse Libraries，点击Next
5、找到Java EE 5，点击Finish
6、再看代码，红叉已经解决
