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第22講 struts2-OGNL訪問靜態方法和屬性

在HeadFirstStruts2chapter04 專案中, 1新建com.cruise.common,Mystatic類,寫靜態方法和靜態屬性,MyStatic 並沒有繼承ActionSupportpackage com.cruise.common;public class MyStatic {     public static final String str="www.cruiseloveashley.com";     public static String  printUrl(){        return "cruiseloveAshley";     } }2success.jsp,

<%@ page language="java" contentType="text/html; charset=UTF-8"     pageEncoding="UTF-8"%> <%@taglib prefix="s" uri="/struts-tags" %> DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"
> <title>Insert title heretitle> head> <body>ognl訪問JavaBean的資料:<s:property value="student.name"/><s:property value="student.age"/><br>ognl訪問List集合的資料:<s:property value="students[0].name"/><s:property value="students[0].age"/><br>ognl訪問List集合的資料:<s:property value="students[1].name"
/><s:property value="students[1].age"/><br>ognl訪問Map集合的資料:<s:property value="studentMap['goodStudent'].name"/><s:propertyvalue="studentMap['goodStudent'].age"/><br>ognl訪問Map集合的資料:<s:property value="studentMap['badStudent'].name"/><s:propertyvalue="studentMap['badStudent'].age"/><br>ognl訪問靜態屬性的資料:<s:property value="@[email protected]"/><br> ognl訪問靜態屬性的資料:<s:property value="@[email protected]()"/><br> body> html>3struts.xml 新增配置 ,允許訪問靜態方法, <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"     "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <constant name="struts.ognl.allowStaticMethodAccess" value="true"></constant> <package name="manage" namespace="/" extends="struts-default">     <action name="hello" class="com.cruise.action.HelloAction" >        <result name="success" >success.jsp</result>     </action> </package> </struts>HelloAction如下:package com.cruise.action;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.cruise.model.Student;import com.opensymphony.xwork2.ActionSupport;public class HelloAction extends ActionSupport{          private Student student;     private List students;     private Map studentMap;          public Student getStudent() {        return student;     }     public void setStudent(Student student) {        this.student = student;     }          public List getStudents() {        return students;     }     public void setStudents(List students) {        this.students = students;     }     public Map getStudentMap() {        return studentMap;     }     public void setStudentMap(Map studentMap) {        this.studentMap = studentMap;     }     @Override     public String execute() throws Exception {                student= new Student("小八","21");                students = new ArrayList();        students.add(new Student("ashely","23"));        students.add(new Student("jack","45"));                studentMap = new HashMap();        studentMap.put("goodStudent", new Student("cruise","26"));        studentMap.put("badStudent", new Student("Tom","23"));        return "success";     } }4測試:本案例中HelloAction中並沒有太多作用,只不過實現了跳轉頁面。 http://localhost:8080/HeadFirstStruts2chapter04/hello