在 JSF 的 Managed Bean 中获得request session对象
request:
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FacesContext context = FacesContext.getCurrentInstance();
ExternalContext ec = context.getExternalContext();
HttpServletRequest request = (HttpServletRequest) ec.getRequest();


session:
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FacesContext context = FacesContext.getCurrentInstance();
ExternalContext ec = context.getExternalContext();
HttpSession session = (HttpSession) ec.getSession(true);


http://stenlylee.iteye.com/blog/317186