struts.xml
<!--OGNL表达式 --> <package name="Ognl" extends="struts-default"> <action name="getOgnl" class="com.cb.Ognl" method="TestOgnl"> <result name="list">/WEB-INF/page/Ognl.jsp</result> </action> </package>
Ognl.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>
<%@ taglib uri="/struts-tags" prefix="s"%><!--使用Struts2标签 -->
<%
request.setAttribute("name", "陈冰");
request.getSession().setAttribute("age", 25);
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘Ognl.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>
<!--Ognl表达式输出request属性的值 -->
<s:property value="#request.name" />
<br>------------------------------<br>
<!--Ognl表达式输出session中属性的值 -->
<s:property value="#session.age" />
<br>------------------------------<br>
<s:property value="#session.Phone" />
<br>------------------------------<br>
<!--Ognl表达式输出值栈中的属性的值 -->
<s:property value="Email" />
<br>------------------------------<br>
<!--Ognl表达式构造list集合 -->
<s:set var="list" value="{‘广西‘,‘科技‘,‘大学‘}" scope="session"></s:set>
<!--s:iterator迭代特点:把当前迭代对象存放在值栈的栈顶中 -->
<s:iterator value="#session.list">
<!--value为 NULL输出值栈栈顶的值 -->
<s:property />
</s:iterator>
<br>------------------------------<br>
<!--Ognl表达式构造Map集合 -->
<s:set var="map" value="#{‘小张‘:‘XZ‘,‘小李‘:‘XL‘,‘小陈‘:‘XC‘}" scope="request"></s:set>
<!--s:iterator迭代特点:把当前迭代对象存放在值栈的栈顶中 -->
<s:iterator value="#request.map">
<s:property value="key" />:<s:property value="value" />
</s:iterator>
<br>------------------------------<br>
<!--输出后台Map集合值 -->
<s:property value="#request.key1" />
<s:property value="#request.key2" />
<s:property value="#request.key3" />
<br>------------------------------<br>
<!--Ognl表达式判断某个元素是否在某个集合中 -->
<s:if test="‘小张‘ in {‘小张‘,‘小李‘,‘小陈‘}">
在集合中
</s:if>
<s:else>
不在集合中
</s:else>
<br>------------------------------<br>
<!--结合Action，输出价格大于60的书本 -->
<s:iterator value="books.{?#this.bookPrice>60}">
书名:<s:property value="bookName"/>,价格:<s:property value="bookPrice"/>
<br>
</s:iterator>
</body>
</html>
Book.java
package com.cb;
public class Book {
private Integer bookId;
private String bookName;
private float bookPrice;
public Integer getBookId() {
return bookId;
}
public void setBookId(Integer bookId) {
this.bookId = bookId;
}
public String getBookName() {
return bookName;
}
public void setBookName(String bookName) {
this.bookName = bookName;
}
public float getBookPrice() {
return bookPrice;
}
public void setBookPrice(float bookPrice) {
this.bookPrice = bookPrice;
}
//构造器
public Book(Integer bookId, String bookName, float bookPrice) {
this.bookId = bookId;
this.bookName = bookName;
this.bookPrice = bookPrice;
}
}
Ognl.java
package com.cb;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
public class Ognl {
private String Email;
// book
private List<Book> books;
public String getEmail() {
return Email;
}
public void setEmail(String email) {
Email = email;
}
public List<Book> getBooks() {
return books;
}
public void setBooks(List<Book> books) {
this.books = books;
}
public String TestOgnl() {
this.Email = "[email protected]";
ActionContext.getContext().getSession().put("Phone", "15818331379");
Map<String, Integer> maps = new HashMap<String, Integer>();
maps.put("key1", 1);
maps.put("key2", 2);
maps.put("key3", 3);
for (Map.Entry<String, Integer> entry : maps.entrySet()) {
ActionContext.getContext().put(entry.getKey(), entry.getValue());// 往request中注值
}
books = new ArrayList<Book>();
books.add(new Book(1, "Java", 78));
books.add(new Book(2, "Extjs", 35));
books.add(new Book(3, "Html", 45));
books.add(new Book(4, "Jsp", 88));
return "list";
}
}
时间： 2024-08-07 17:00:45