Servlet.service() for servlet [jsp] in context with path [/e12_2] threw exception [javax.servlet.Ser

Servlet.service() for servlet [jsp] in context with path [/e12_2] threw exception [javax.servlet.ServletException: javax.servlet.jsp.JspTagException] with root cause javax.servlet.jsp.JspTagException

应用



定义request范围内的变量username



设置UserInfo对象

ccd1