Struts值栈与Ognl
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Struts值栈与Ognl
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配置xml：
<?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="stack" namespace="/stack" extends="struts-default"><action name="stack_*" class="star.july.c_valuestack.StackAction" method="{1}"><result name="success">/index.jsp</result><result name="input">/add.jsp</result></action></package></struts>
StackAction： ??
package star.july.c_valuestack; import java.util.Map; import star.july.b_validation.Student; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; import com.opensymphony.xwork2.util.ValueStack; public class StackAction extends ActionSupport{Student student;public Student getStudent() {return student;}public void setStudent(Student student) {this.student = student;}public String stack(){String name = student.getName();ActionContext ac = ActionContext.getContext();//使用對(duì)象棧存儲(chǔ)對(duì)象//獲取值棧，用list的棧方式存取ValueStack vs = ac.getValueStack();//將對(duì)象放入棧中，壓棧vs.push(student);//彈棧// vs.pop();//使用映射棧存取對(duì)象//添加自己的值和棧Map map = ac.getContextMap();map.put("map", "自定義");//獲取requestMap rp = (Map)ac.get("request");rp.put("rp", "請(qǐng)求");//獲取sessionMap sp = ac.getSession();sp.put("sp", "會(huì)話");//獲取application并賦值Map ap = ac.getApplication();ap.put("ap", "應(yīng)用");System.out.println(student);return SUCCESS;} }
輸入值：
<body><s:fielderror></s:fielderror><form action="<c:url value='/stack/stack_stack'/>" method="post">用戶名：<input type="text" name="student.name"><br><input type="submit" value="提交"/></form>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib uri="/struts-tags" prefix="s" %> <% 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 'index.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><!-- 對(duì)象棧的取方式，用[] --><!-- 取出方式，從下表開(kāi)始一直取到結(jié)束為止 -->對(duì)象棧的取方式，用[]<s:property value="[1]"/><br><s:property value="[0]"/><br><br><br><!-- 映射棧的取值方式，前面加# -->映射棧的取值方式，前面加#<br><s:property value="#map"/><br><s:property value="#request.rp"/><br><s:property value="#session.sp"/><br><s:property value="#application.ap"/><!-- 調(diào)試值棧，看值 --><s:debug></s:debug></body> </html>
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