JSF参数传递方式之三：通过session(application)对象传递

JSF参数传递方式之三：通过session(application)对象传递

页面到Bean的参数传递
页面中设置参数：

<h:form>
<%session.setAttribute("name","hujilie");%>
<%application.setAttribute("id","123456");%>
<h:commandButtonvalue="Test8"action="#{paramBean.test2}"></h:commandButton>
<h:commandLinkvalue="Test8"action="#{paramBean.test2}"></h:commandLink>
</h:form>

<h:form>
			<%session.setAttribute("name","hujilie"); %>
			<%application.setAttribute("id","123456"); %>
			<h:commandButton value="Test8" action="#{paramBean.test2}"></h:commandButton>
			<h:commandLink  value="Test8" action="#{paramBean.test2}"></h:commandLink>
	</h:form>

后台取参数：

FacesContextcontext=FacesContext.getCurrentInstance();
MapsessionMap=context.getExternalContext().getSessionMap();
MapapplicationMap=context.getExternalContext().getApplicationMap();
HttpSessionsession=(HttpSession)context.getExternalContext().getSession(true);
ServletContextapplication=(ServletContext)context.getExternalContext().getContext();
sessionMap.get("name");
applicationMap.get("id");
session.getAttribute("name");
application.getAttribute("id");

FacesContext context = FacesContext.getCurrentInstance();
        Map sessionMap =context.getExternalContext().getSessionMap();
        Map applicationMap = context.getExternalContext().getApplicationMap();
HttpSession session =(HttpSession) context.getExternalContext().getSession(true);
ServletContext application = (ServletContext)context.getExternalContext().getContext();
        sessionMap.get("name");
		applicationMap.get("id");
		session.getAttribute("name");
        application.getAttribute("id");

页面到页面的参数传递
页面中设置参数：

<h:form>
<%session.setAttribute("name","hujilie");%>
<%application.setAttribute("id","123456");%>
<h:outputLinkvalue="param2.jsf">Test10</h:outputLink>
</h:form>

<h:form>
			<%session.setAttribute("name","hujilie"); %>
			<%application.setAttribute("id","123456"); %>
			<h:outputLink value="param2.jsf">Test10</h:outputLink>
	</h:form>

页面中取参数：

<h:outputTextvalue="#{sessionScope.name}"></h:outputText><br>
<h:outputTextvalue="#{applicationScope.id}"></h:outputText>