我正在尝试实现一个基本的struts应用程序，我试图将一个字符串值从java文件传递到jsp。但是我在jsp页面中得到了一个空值。我已经在这个问题上工作了2-3天，但我仍然无法解决这个问题。请帮助我
web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>Hello World Struts Application</display-name>
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>3</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>3</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>view.jsp</welcome-file>
</welcome-file-list>
</web-app>struts-config.xml
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
<action-mappings>
<action path="/view" type="myAction" validate="false">
<forward name="success" path="/first" />
</action>
<action path="/view"
forward="/view.jsp"/>
<action path="/first" type="myAction" validate="false">
<forward name="success" path="/first.jsp" />
</action>
</action-mappings>
</struts-config>view.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<form action="first.do">
Enter name :
<input type="text" name="name"/>
<input type="submit" value="Enter"/>
</form>
</body>
</html>first.jsp
<%@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>myAction.java
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("view.jsp");
reqDispatcher.forward(request,response);
return (mapping.findForward("success"));
}
}如何检查值是否从java文件传递到jsp？提前感谢您的帮助。
1条答案
按热度按时间qoefvg9y1#
在execute方法外声明字符串并保留它getter setter然后在execute方法中将其初始化为您值现在在jsp中使用property标记来获取其值
我的jsp页面包含
<s:property value="s"/>