struts2笔记2-Hello World Using Struts 2 -

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struts2笔记2-Hello World Using Struts 2

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struts

Create a class to store the welcome message (the model)
Create a server page to present the message (the view)
Create an Action class to control the interaction between the user, the model, and the view (the controller)
Create a mapping (struts.xml) to couple the Action class and view

By creating these components, we are separating the work flow into three well-known concerns: the View, the Model, and the Controller. Separating concerns makes it easier to manage applications as they become more complex.

(MVC的好处，N多书都在讲，看看原文是怎么写的)

Step 1 - Create The Model Class MessageStore.java

Message.java

package org.apache.struts.helloworld.model;

public class MessageStore {
	
	private String message;
	
	public MessageStore() {
		
		setMessage("Hello Struts User");
	}

	public String getMessage() {

		return message;
	}

	public void setMessage(String message) {

		this.message = message;
	}

}

Step 2 - Create The Action Class HelloWorldAction.java

HelloWorld.java

package org.apache.struts.helloworld.action;

import org.apache.struts.helloworld.model.MessageStore;
import com.opensymphony.xwork2.ActionSupport;

public class HelloWorldAction extends ActionSupport {

	private static final long serialVersionUID = 1L;

	private MessageStore messageStore;
	
	public String execute() throws Exception {
		
		messageStore = new MessageStore() ;
		return SUCCESS;
	}

	public MessageStore getMessageStore() {
		return messageStore;
	}

	public void setMessageStore(MessageStore messageStore) {
		this.messageStore = messageStore;
	}

}

Step 3 - Create The View HelloWorld.jsp

HelloWorld.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ 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=ISO-8859-1">
<title>Hello World!</title>
</head>
<body>
    <h2><s:property value="messageStore.message" /></h2>
</body>
</html>

Step 4 - Add The Struts Configuration In struts.xmlstruts.xml

<?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.jsp</result>
  </action>
		
  <action name="hello" class="org.apache.struts.helloworld.action.HelloWorldAction" method="execute">
    <result name="success">/HelloWorld.jsp</result>
  </action>

</package>

</struts>

Step 5 - Create The URL Actionindex.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ 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=ISO-8859-1">
<title>Basic Struts 2 Application - Welcome</title>
</head>
<body>
<h1>Welcome To Struts 2!</h1>
<p><a href="<s:url action='hello'/>">Hello World</a></p>
</body>
</html>

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2012-11-22 14:15
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struts2笔记2-Hello World Using Struts 2

Step 1 - Create The Model Class MessageStore.java

Step 2 - Create The Action Class HelloWorldAction.java

Step 3 - Create The View HelloWorld.jsp

Step 4 - Add The Struts Configuration In struts.xml

Step 5 - Create The URL Action

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struts2笔记2-Hello World Using Struts 2

Step 1 - Create The Model Class MessageStore.java

Step 2 - Create The Action Class HelloWorldAction.java

Step 3 - Create The View HelloWorld.jsp

Step 4 - Add The Struts Configuration In struts.xml

Step 5 - Create The URL Action

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