5.Struts2的OGNL表达式

1.创建javaweb项目Struts2_Part4_OGNL并在WebRoot下的WEB-INF下的lib文件夹下添加如下jar文件

 commons-fileupload-1.2.1.jar

 commons-io-1.3.2.jar

 freemarker-2.3.15.jar

 mybatis-3.2.2.jar

 ognl-2.7.3.jar

 ojdbc14.jar

 struts2-core-2.1.8.1.jar

 xwork-core-2.1.6.jar

所需要的jar

2.在src下创建struts.xml文件

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN" "struts-2.1.7.dtd" >
 <struts>
   <!-- 中文乱码处理 -->
   <constant name="struts.i18n.encoding" value="UTF-8"/>
   <package name="default" namespace="/" extends="struts-default">
     <!-- 全局配置 -->
     <global-results>
       <result name="error">error.jsp</result>
     </global-results>

     <!-- 时间格式化配置 -->
     <action name="currentDate" class="com.action.DateFormatAction" method="getFormateDate">
       <result name="success">ognldemo.jsp</result>
     </action>

     <!-- Student的控制器的配置 -->
     <action name="student" class="com.action.StudentAction" method="getInfo">
       <result name="success">index.jsp</result>
     </action>

     <!-- 详细信息的控制器的配置 -->
     <action name="stuinfo" class="com.action.StuInfoAction" method="getInfo">
       <result name="success">success.jsp</result>
     </action>
   </package>
 </struts>

struts.xml

3.在src下的com.entity包下创建Student.java文件

 package com.entity;

 public class Student {
     private Integer sid;
     private String sname;

     public Student() {
     }
     public Student(Integer sid, String sname) {
         this.sid = sid;
         this.sname = sname;
     }
     public Integer getSid() {
         return sid;
     }
     public void setSid(Integer sid) {
         this.sid = sid;
     }
     public String getSname() {
         return sname;
     }
     public void setSname(String sname) {
         this.sname = sname;
     }
     @Override
     public String toString() {
         return "Student [sid=" + sid + ", sname=" + sname + "]";
     }
 }

Student.java

4.在src下的com.action包下创建StudentAction.java文件

 package com.action;

 import com.entity.Student;
 import com.opensymphony.xwork2.ActionSupport;

 public class StudentAction extends ActionSupport {

 @Override
 public String execute() throws Exception {

         return ERROR;
     }

 private Student stu;
    public String getInfo(){
        stu=new Student(1, "胡淑红");
        return SUCCESS;
    }

 public Student getStu() {
     return stu;
 }

 public void setStu(Student stu) {
     this.stu = stu;
 }

 }

StudentAction.java

5.在src下的com.action包下创建StuInfoAction.java文件

 package com.action;

 import java.util.ArrayList;
 import java.util.List;

 import com.entity.Student;
 import com.opensymphony.xwork2.ActionSupport;

 public class StuInfoAction extends ActionSupport{
     private String[] ah;
     private List<Student> list;
     public String getInfo(){
         if(ah!=null){
             System.out.println("爱好是：");
             for (int i = 0; i < ah.length; i++) {
                 System.out.print(ah[i]+"，");
             }
         }else{
             System.out.println("没有获取参数");
             list=new ArrayList<Student>();
             Student stu=new Student(1, "holly");
             list.add(stu);
         }

         return SUCCESS;
     }

     public String[] getAh() {
         return ah;
     }

     public void setAh(String[] ah) {
         this.ah = ah;
     }

     public List<Student> getList() {
         return list;
     }

     public void setList(List<Student> list) {
         this.list = list;
     }
 }

StuInfoAction.java

6.在src下的com.action包下创建DateFormatAction.java文件

 package com.action;

 import java.util.Date;

 import com.opensymphony.xwork2.ActionSupport;

 public class DateFormatAction extends ActionSupport {
     //1.定义私有的Date类型的对象
     private Date currentDate;
     //2.action核心处理业务的方法
     public String getFormateDate(){

         //创建Date对象，也就是给成员对象赋值
         currentDate=new Date();
         System.out.println("系统时间："+currentDate);
         return SUCCESS;
     }
     //3.代理对象使用的getter和setter
     public Date getCurrentDate() {
         return currentDate;
     }
     public void setCurrentDate(Date currentDate) {
         this.currentDate = currentDate;
     }
 }

DateFormatAction.java

7.在WebRoot下的WEB-INF下web.xml文件

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app version="2.5"
     xmlns="http://java.sun.com/xml/ns/javaee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 <filter>
  <filter-name>struts2</filter-name>
  <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
 </filter>
 <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>

 </filter-mapping>
   <welcome-file-list>
     <welcome-file>ognldemo.jsp</welcome-file>
   </welcome-file-list>
 </web-app>

web.xml

8.在WebRoot下创建ognldemo.jsp文件

 <%@ 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>
   <!-- 在request作用域里设置age变量，值为18 -->
   <s:set name="age" value="18" scope="request"/>

   <!-- 直接输出request作用域变量的值 -->
   <s:property value="#request.age"/>
   <s:property value="#attr.age"/>

   <!-- 在session作用域里设置name变量，值为holly -->
   <s:set name="sname" value="'holly'" scope="session"/>

   <!-- 直接输出session作用域变量的值 -->
   <s:property value="#session.sname"/>
   <s:property value="#attr.sname"/>

   <!-- 在application作用域里设置sex变量，值为女 -->
   <s:set name="sex" value="'女'" scope="application"/>

   <!-- 直接输出session作用域变量的值 -->
   <s:property value="#application.sex"/>
   <s:property value="#attr.sex"/>

   <!-- 格式化后台action发过来的Date类型的系统时间 -->
   格式化的时间：<s:date name="currentDate" format="dd/MM/yyyy"/>
   没有格式化：<s:date name="currentDate" />

   </body>
 </html>

ognldemo.jsp

9.在WebRoot下创建index.jsp文件

 <%@ 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>
       学生编号：<s:property value="stu.sid"/>
       学生姓名：<s:property value="stu.sname"/>
      <form action="stuinfo" method="post">
     爱好：
        <input type="checkbox" name="ah" value="吃饭"/>吃饭
        <input type="checkbox" name="ah" value="睡觉"/>睡觉
        <input type="checkbox" name="ah" value="张乐素质很高"/>张乐素质很高
       <input type="submit" value="提交"/>
     </form>
   </body>
 </html>

index.jsp

10.在WebRoot下创建success.jsp文件

 <%@ 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>
      操作成功
      属性获取：
      <s:property value="ah[0]"/>
     <s:property value="ah[1]"/>
     <br/>
     <s:iterator value="list">
      sid:<s:property value="sid"/>
      <br/>
      sname:<s:property value="sname"/>
     </s:iterator>

   </body>
 </html>

success.jsp

11.在WebRoot下创建error.jsp文件

 <%@ page language="java" import="java.util.*" 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 '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>
      操作失败
   </body>
 </html>

error.jsp