我正在研究struts,我正在尝试将一个String值从java文件传递到jsp页面。但我收到一个空值。请帮忙。
我的java代码:
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class myAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
String s="Karthikeyan";
request.setAttribute("s",s);
RequestDispatcher reqDispatcher = getRequestDispatcher("first.jsp");
reqDispatcher.forward(request,response);
return (mapping.findForward("success"));
}
}
我的jsp代码:
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
Welcome!!!!!!!!
<%
String s=(String)request.getAttribute("s");
out.println("s="+s);
%>
</body>
</html>
我的jsp输出:
Welcome!!!!!!!! s=null
我想知道为什么&#39;没有被分配。非常感谢帮助。
答案 0 :(得分:0)
而不是做
<%
String s=(String)request.getAttribute("s");
out.println("s="+s);
%>
尝试用以下内容替换整个内容:
s=${s}