Github代码地址

Struts13---Ognl

模拟初始化的jsp页面 

<body> <a href="user/login">登录</a> </body>

 

public class User {

       
        private  String  name;  //只要和前台页面name属性值一致
        private  int  age;
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public int getAge() {
            return age;
        }
        public void setAge(int age) {
            this.age = age;
        }
        public User(String name, int age) {
            super();
            this.name = name;
            this.age = age;
        }
        public User() {
            super();
        }

        
        
        
            
}

 

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
   <constant name="struts.devMode" value="true"/>
     <package name="default" namespace="/" extends="struts-default">
    </package>
    <!-- 引入关联的xml文件 -->
    <include file="user.xml"/>
</struts>   
    
    

 

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
     <package name="user" namespace="/user" extends="default">
         <action name="login" class="cn.bdqn.action.UserAction"  method="login">
             <result name="success">/success.jsp</result>
         </action>
    </package>
</struts>   
    
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
     <package name="user" namespace="/user" extends="default">
         <action name="login" class="cn.bdqn.action.UserAction"  method="login">
             <result name="success">/success.jsp</result>
         </action>
    </package>
</struts>   
    

 

public class UserAction extends  ActionSupport{

    
  public String  login(){
      System.out.println("进入了login");
      
          //因为valueStack对象保存在了请求作用域中!所以必须获取request对象
        Map<String, Object> request=  (Map<String, Object>)
                ActionContext.getContext().get("request");
          //向作用域中传递一个值
        request.put("name", "小黑黑");
        
        //获取ValueStack对象
        ValueStack valueSatck= (ValueStack) request.get("struts.valueStack");
        System.out.println("valueSatck的值是==》"+valueSatck);
       /**
        * valueSatck的值是==》com.opensymphony.xwork2.ognl.OgnlValueStack@5c5e85d3
        * OgnlValueStack:是我们需要研究的对象! 是ValueStack的实现类!
        */
        /**
         * 向值栈中增加数据    
         *  前台的s:debug中的Value Stack Contents中,
         *  增加了 name和age两个属性!
         *   Value Stack Contents就是 CompoundRoot对象!
         *   这里面的内容!直接获取!
         */
        valueSatck.getRoot().add(0, new User("小白",50));
        /**
         * 向栈的上下文中增加数据 就是 前台 s:debug中的Stack Context
         *  key:requestName
         *  value:大家辛苦了
         */
        valueSatck.getContext().put("requestName", "大家辛苦了");
        Map<String,Object>  map=new HashMap();
        map.put("1", "这是在Stack Context中");
        map.put("2", "必须使用#才能访问我");
        valueSatck.getContext().put("map",map);
      
      return  "success";
  }
 
}

 

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'success.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">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
  <%--
    都是在  值栈中,直接使用!
  --%>
  
  <s:property value="name"/>
  <s:property value="age"/> <br/>
  
<%--
01.requestName  确实是在我们的栈上下文中的 key
  如果对应的值是一个具体的数值! 不用使用#
  
02.request是一个作用域,
作用域中肯定有很多对象或者是属性!
如果想获取某个具体的对象应该使用#  
    --%>
  <s:property value="requestName"/>
  <s:property value="#request.name"/>
  
  <s:debug/>
  </body>
</html>

 

 

 

 

 

 

 

 

 

 

 

posted @ 2017-04-06 13:17  @小葱拌豆腐  阅读(335)  评论(0编辑  收藏  举报

霸气