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从值栈获取对象
-------------------siwuxie095
从值栈获取对象
1、具体步骤
(1)在 Action 中向值栈放对象
(2)在 JSP 页面中从值栈获取对象
2、具体实现
(1)编写实体类
User.java:
package com.siwuxie095.entity;
// User 实体类 public class User {
private String username; private String password; private String address;
public String getUsername() { return username; } public void setUsername(String username) { this.username = username; }
public String getPassword() { return password; } public void setPassword(String password) { this.password = password; }
public String getAddress() { return address; } public void setAddress(String address) { this.address = address; }
@Override public String toString() { return "User [username=" + username + ", password=" + password + ", address=" + address + "]"; }
} |
(2)编写 Action
ObjectAction.java:
package com.siwuxie095.action;
import com.opensymphony.xwork2.ActionSupport; import com.siwuxie095.entity.User;
public class ObjectAction extends ActionSupport {
/* * (1) 在 Action 中定义实体类对象 * * 因为总归是要 new 的,所以就在这 * 里创建,而不是声明了 */ private User user=new User();
/* * (2) 提供实体类对象的 get 方法即可 */ public User getUser() { return user; }
@Override public String execute() throws Exception {
/* * 如果上面仅仅是声明了实体类对象, * 那么就要在这里创建,即 new 出来 */
/* * (3) 在执行的方法中,向实体类对象中设置值 */
user.setUsername("siwuxie095"); user.setPassword("8888"); user.setAddress("China");
return SUCCESS; } } |
(3)配置 Action
struts.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="demo" extends="struts-default" namespace="/">
<action name="object" class="com.siwuxie095.action.ObjectAction"> <result name="success">/object.jsp</result> </action>
</package>
</struts> |
(4)编写页面
object.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!-- 引入 Struts2 标签库 --> <%@ taglib uri="/struts-tags" prefix="s"%>
<!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>Object</title> </head> <body>
<!-- 获取值栈中实体类对象的值 --> <s:property value="user.username"></s:property> <s:property value="user.password"></s:property> <s:property value="user.address"></s:property>
</body> </html> |
(5)访问路径
http://localhost:8080/工程名/object.action
【made by siwuxie095】
从值栈获取对象