struts1.x mvc简单例程

因为项目需要，需要使用struts1.x 。因此学习下struts框架。
例程从struts 实现MVC框架入手，完成一次request请求。
一.前台
两个jsp文件
index.jsp:
只有一个button按钮，发送request请求

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="utf-8"%>
<!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>Index</title>
</head>
<body>
    <form method="post" action="/structsLearning/roller-ui/createWebsite.do?method=create">
        <input type="submit" value="start website"/>
    </form>
</body>
</html>

createWebsite.jsp:
request请求成功页面显示，从后台传入一个值读取

<h1><%=request.getAttribute("userName")%> is creating a website</h1>

二.配置文件
web.xml：
将所有的*.do请求都配置到struts-config.xml

 <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
        <param-name>config</param-name>
        <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>  
        <param-name>debug</param-name>  
        <param-value>3</param-value>  
    </init-param>  
    <init-param>  
        <param-name>detail</param-name>  
        <param-value>3</param-value>  
    </init-param>  
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
</servlet-mapping>

struts-config.xml:
parameter 指定method这样一个servlet 文件就可以对应多个不同的url请求。使用
method=**即可。
type属性指定了servlet class。
path:指定了forward 的jsp文件

<action-mappings>
    <action 
        path="/roller-ui/createWebsite"
        type="org.apache.roller.struts.CreateWebsiteAction"
        scope="request"
        parameter="method"
        >
    <forward
        name="createWebsite.page"
        path="/jsp/createWebsite.jsp"
    />
    </action>
</action-mappings>

三.java 文件
CreateWebsiteAction.java:
mapping.findForward(“createWebsite.page”)这边forward名字与struts-config.xml进行了映射。

package org.apache.roller.struts;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
public class CreateWebsiteAction extends DispatchAction {

public ActionForward create(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,HttpServletResponse response) throws Exception {
        ActionForward forward = mapping.findForward("createWebsite.page");
        request.setAttribute("userName", "FS");
        return forward;
    }

}