我无法从Servlet到JSP页面获取会话属性。我的Servlet:(columnChartServlet.java)
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.getSession().setAttribute("myname", "Steve");
request.getSession().setAttribute("age", "50");
}
我的JSP(admin.jsp)
<head>
<%@page import="com.cos.sms.actions.columnChartServlet" %>
<jsp:useBean id="chartMast" class="com.cos.sms.actions.columnChartServlet" scope="session" />
</head>
<body>
<%= request.getAttribute("myname") %>
<%= request.getAttribute("age") %>
<%= request.getSession().getAttribute("myname") %>
<%= request.getSession().getAttribute("age") %>
</body>
我的Struts-config
<action input="/jsp/login.jsp" path="/login" name="loginForm" type="com.cos.sms.actions.LoginAction" scope="session" parameter="method" >
<forward name="admin" path="/jsp/admin.jsp"/>
<forward name="normal" path="/view_info.do?method=getDropdownSelectData"/>
<forward name="diplayloginjsp" path="/jsp/login.jsp"/>
</action>
登录我的admin.jsp后,将在login.do的URL中打开。
我的servlet的web.xml配置
<servlet>
<servlet-name>columnChartServlet</servlet-name>
<servlet-class>com.cos.sms.actions.columnChartServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>columnChartServlet</servlet-name>
<url-pattern>/columnChartServlet</url-pattern>
</servlet-mapping>
当我运行应用程序admin.jsp时,将打印值显示为null。
如果您像下面在jsp中那样使用,您将能够检索数据
session.getAttribute(“ myname”);
并且在您的servlet中尝试如下使用:
request.getSession(false).setAttribute(“ myname”,“ Steve”);