pageContex获取其他数据

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pageContext

setAttribbute(String name,String value) //默认为是pagecontext

setAttribute(String name,String value,int scope)

PageContext.REQUEST_SCOPE 2

PageContext.SESSION_SCOPE 3

PageContext.APPLICATION_SCOPE 4 她是长量可以通过getAttributesScope() 获取

getAttribute(Sting name);默认是 pageContext

getAttribute(String name,int scope);

常量同上

eg:

    <%
       pageContext.setAttribute("page","hello");
       pageContext.setAttribute("request","hello",PageContext.REQUEST_SCOPE);
       pageContext.setAttribute("session","hello",PageContext.SESSION_SCOPE);
       pageContext.setAttribute("application","hello",PageContext.APPLICATION_SCOPE);
   %>
   <%
       out.println(pageContext.getAttribute("page"));
       out.println(pageContext.getAttribute("request",PageContext.REQUEST_SCOPE));
       out.println(pageContext.getAttribute("session",PageContext.SESSION_SCOPE));
       out.println(pageContext.getAttribute("application",PageContext.APPLICATION_SCOPE));
   %>

pageContext　获取其他内置对象

ServletRequest getRequest()

ServletResponse getResponse()

ServeltSession getSession()

ServletConfig getServletConfig()

SerlvetContext getServelContext()

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