目录：
- 概述
- 创建 model
- 创建 view
- 创建 controller
- 运行演示
- 演变修改
[一]、概述
在 Struts2基础教程之一 中创建的web项目基础上，实现一个简单的Hello World的web应用。
[二]、创建 model
创建Model 类: MessageStore.java
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package com.micmiu.struts2.demo.helloworld.model; /** * * @author <a href="http://www.micmiu.com">Michael Sun</a> */ public class MessageStore { private String message; public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } } |
[三]、创建 view
创建页面：HelloWorld.jsp
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<%@ 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>Welcome to micmiu.com !</title> </head> <body> <h2> <s:property value="messageStore.message" /> </h2> </body> </html> |
[四]、创建 controller
创建Action 类：HelloWorldAction.java
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package com.micmiu.struts2.demo.helloworld.action; import com.micmiu.struts2.demo.helloworld.model.MessageStore; import com.opensymphony.xwork2.ActionSupport; /** * * @author <a href="http://www.micmiu.com">Michael Sun</a> */ public class HelloWorldAction extends ActionSupport { private static final long serialVersionUID = 1L; private MessageStore messageStore; public String execute() throws Exception { messageStore = new MessageStore(); messageStore.setMessage("Hello Struts2,welcome to www.micmiu.com !"); return SUCCESS; } public MessageStore getMessageStore() { return messageStore; } public void setMessageStore(MessageStore messageStore) { this.messageStore = messageStore; } } |
修改配置文件： struts.xml
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<?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.devMode" value="true" /> <package name="basicstruts2" extends="struts-default"> <action name="index"> <result>/index-struts2.jsp</result> </action> <action name="sayHello" class="com.micmiu.struts2.demo.helloworld.action.HelloWorldAction" method="execute"> <result name="success">/HelloWorld.jsp</result> </action> </package> </struts> |
[五]、运行演示
运行启动项目，打开浏览器输入：http://localhost:8082/struts2-basic-demo/sayHello.action 回车：
看到上述截图内容即表示运行成功了。
[六]、演变修改
简单演示struts2的标签以及Action的编码功能。
Model:MessageStore.java 增加的内容如下：
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@Override public String toString() { return "MessageStore [message=" + message + "]"; } |
Action：HelloWorldAction.java 修改后如下：
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package com.micmiu.struts2.demo.helloworld.action; import com.micmiu.struts2.demo.helloworld.model.MessageStore; import com.opensymphony.xwork2.ActionSupport; /** * * @author <a href="http://www.micmiu.com">Michael Sun</a> */ public class HelloWorldAction extends ActionSupport { private static final long serialVersionUID = 1L; private static int helloCount = 0; private String userName; private MessageStore messageStore; public String execute() throws Exception { messageStore = new MessageStore(); if (null != userName) { messageStore.setMessage("Hello " + userName + " ,welcome to www.micmiu.com"); } else { messageStore .setMessage("Hello Struts2,welcome to www.micmiu.com !"); } helloCount++; return SUCCESS; } public MessageStore getMessageStore() { return messageStore; } public void setMessageStore(MessageStore messageStore) { this.messageStore = messageStore; } public int getHelloCount() { return helloCount; } public void setHelloCount(int helloCount) { HelloWorldAction.helloCount = helloCount; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } } |
页面：index.jsp 修改成如下：
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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags"%> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Welcome to micmiu.com</title> </head> <body> <h1>Welcome To Struts2!</h1> <p> <a href="<s:url action='sayHello' />">Hello World</a> </p> <s:url action="sayHello" var="helloLink"> <s:param name="userName">Michael Sun</s:param> </s:url> <p> <a href="${helloLink}">Hello Michael Sun</a> </p> <s:form action="sayHello"> <s:textfield name="userName" label="Your name" /> <s:submit value="Submit" /> </s:form> </body> </html> |
页面：HelloWorld.jsp 修改成如下：
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<%@ 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>Welcome to micmiu.com !</title> </head> <body> <p> I've said hello <s:property value="helloCount" /> times! </p> <h2> message:<s:property value="messageStore.message" /> </h2> <h2> toString:<s:property value="messageStore" /> </h2> </body> </html> |
运行启动项目，打开浏览器输入：http://localhost:8082/struts2-basic-demo/ 打开index.jsp
看到上述截图内容即表示运行成功了。
本文介绍到此结束@Michael Sun.
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