JSP EL 表达式

有困难，找猪八戒

# ${param.test}            --> request.getParameter("test") 
# ${requestScope.test}     --> request.getAttribute("test"); 
# ${sessionScope.test}     --> session.getAttribute("test"); 
# ${applicationScope.test} --> application.getAttribute("test"}; 
# ${pageScope.test}        --> pageContext.getAttribute("test"}; 
# ${test}                  --> pageContext.findAttribute("test");
有困难，找猪八戒