struts-config.xml配置文件的scope

一 scope说明

指定ActionForm Bean的存在范围，可选取request和session，默认是session。

二通过request取数据

1 LoginAction

package com.cakin.actions;

//这是一个action（表示小队长，需要继承Action）

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;

import com.cakin.forms.UserForm;

public class LoginAction extends Action {

//我们需要重新编写一个方法：execute会被自动调用，有点类似servlet的service方法。

@Override

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response)

throws Exception {

//把form转成对应的UserForm对象

UserForm userForm=(UserForm)form;

//简单验证

if("123".equals(userForm.getPassword())){

//把名字存放到request对象域

//request.setAttribute("username", userForm.getUsername());

return mapping.findForward("ok");

}

else{

return mapping.findForward("err");

}

2 wel.jsp

<%@ page language = "java" import = "java.util.*" import = "com.cakin.forms.*" pageEncoding = "utf-8" %>

String path = request.getContextPath();

String basePath = request.getScheme()+ "://" +request.getServerName()+ ":" +request.getServerPort()+path+ "/" ;

<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

< html >

< head >

< base href = " <%= basePath %> " >

< title > My JSP 'wel.jsp' starting page </ title >

< meta http-equiv = "pragma" content = "no-cache" >

< meta http-equiv = "cache-control" content = "no-cache" >

< meta http-equiv = "expires" content = "0" >

< meta http-equiv = "keywords" content = "keyword1,keyword2,keyword3" >

< meta http-equiv = "description" content = "This is my page" >

<!--

-->

</ head >

< body >

welcome <%= ((UserForm)request.getAttribute( "userForm" )).getUsername() %> < br >

< a href = "/strutslogin/" > 返回重新登录 </ a >

</ body >

</ html >

3 struts-config.xml

<? xml version = "1.0" encoding = "UTF-8" ?>

<! DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" " http://struts.apache.org/dtds/struts-config_1_3.dtd" ; >

< struts-config >

< form-beans >

< form-bean name = "userForm" type = "com.cakin.forms.UserForm" ></ form-bean >

</ form-beans >

< action-mappings >

< action path = "/login" name = "userForm" scope = "request" type = "com.cakin.actions.LoginAction" >

< forward name = "ok" path = "/WEB-INF/wel.jsp" ></ forward >

< forward name = "err" path = "/WEB-INF/err.jsp" ></ forward >

</ action >

</ action-mappings >

</ struts-config >

三测试结果

四通过session 取数据

1 struts-config.xml