第19章 J2EE SSH基础学习-Struts2原理图示-SMS表现层升级-1

struts2的运行原理图解：网上图片

首先我们

A ：服务器收到客户端请求request 

B:  ActionMapper 查看这个请求是否归struts2处理，如果是。

C 然后进行一些简单的过滤FilterDispatcher过滤操作。

D ActionProxy代理进行去查询struts.xml获得哪个导演Action invocation需要做出响应，之后导演做出一系列的准备（inteceptor：如数据set工作等 场景布置），

E 之后就是Action表演，并产生一个Action 结果Result

F 导演查看并配置这个Result结果应该做出怎样的回复。

G 撤掉场景布置（还原数据）

H :做出相应。HttpServletResponse

<!-- 一个Action如果没有写类路径，则默认采用ActionSupport方法
如果没有写method，则默认运行execute方法，
-->

<!-- 一个Result如果没有写名字的话，默认为success -->

                <!-- 一个Action如果没有写类路径，则默认采用ActionSupport方法
			如果没有写method，则默认运行execute方法，
		 -->
		<action name="doIt">
			<!-- 一个Result如果没有写名字的话，默认为success -->
			<result>/ok.jsp</result>
		</action>

利用struts更改原sms项目代码表现层：

部分代码：

StudentAction.java

/**
 * 工  程   名:SMS-SSH-20180524	<br>
 * 文  件   名:StudentAction.java	<br>
 * 工具包名:edu.fjnu.training.action	<br>
 * 功能描述:TODO	<br>
 * 创建时间:2018年5月24日 下午1:29:41	<br>
 * 版本信息:V1.0
 * @创建人:Zhou Kailun	
 */
package edu.fjnu.training.action;

import java.io.File;

import edu.fjnu.training.domain.Student;
import edu.fjnu.training.service.StudentService;
import edu.fjnu.training.service.StudentServiceImpl;

/**
 * 类名:StudentAction	<br>
 * 功能描述:	<br> 
 * 创建日期:2018年5月24日 下午1:29:41	<br>
 * 修改备注:
 * @作者信息:Zhou kailun	<br>
 */
public class StudentAction extends BaseAction {

	/**学生信息对象*/
	private Student stu;
	/**上传图片名字：与jsp请求网页名字相同，后面两条属性必须一样写入stuPicFilenName,stuPicContentType */
	private File stuPic; 
	private String stuPicFileName;
	private String stuPicContentType;
	
	/**<p>构造函数:</p><br><br>
	 * <p>描述:</p><br> 
	 */
	public StudentAction() {
		// TODO Auto-generated constructor stub
	}
	public String toReg()throws Exception{
		return "reg_page";
	}
	public String reg()throws Exception{
		StudentService studentService=new StudentServiceImpl();
		studentService.addStudent(stu);
		
		return "loadall";
	} 
	public Student getStu() {
		return stu;
	}
	public void setStu(Student stu) {
		this.stu = stu;
	}
	public File getStuPic() {
		return stuPic;
	}
	public void setStuPic(File stuPic) {
		this.stuPic = stuPic;
	}
	public String getStuPicFileName() {
		return stuPicFileName;
	}
	public void setStuPicFileName(String stuPicFileName) {
		this.stuPicFileName = stuPicFileName;
	}
	public String getStuPicContentType() {
		return stuPicContentType;
	}
	public void setStuPicContentType(String stuPicContentType) {
		this.stuPicContentType = stuPicContentType;
	}  
}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!--
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
-->
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "http://struts.apache.org/dtds/struts-2.5.dtd">


<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="false"></constant>
	<constant name="struts.devMode" value="false"></constant> <!-- 在网页中以开发模式打开，用于程序员直接在网页中查看运行情况 -->
	<constant name="struts.action.extension" value="do,action"></constant> <!-- 如果没有显示配置，默认为action, -->
	<constant name="struts.ui.theme" value="simple"></constant><!-- Struts 生成的UI界面代码风格，我们一般希望是自己能控制的。但是也可以一局各单位公司不同，有不同风格 -->
	<constant name="struts.i18n.encoding" value="utf-8"></constant><!-- struts编码方式为utf-8 -->
	<!-- 
	  http://localhost:8080/strutsDemo/work/demo.do
	  1.struts过滤器拦截到url地址，获得该url的后缀，如果是*.do,则为struts处理范畴。去掉猴嘴，获得实体路径。
	  2.取得包路径（最后一个/之前的路径）/work
	  3.获得action的名字demo，然后找到这个action，创建该action的实例。执行execute方法一次。
	  
	 -->
	 <!-- sms系统基础包 -->
	 <package name="smsPkg" abstract="true" namespace="/" extends="struts-default">
	 
	 </package>
	 
	 <!-- 学生信息管理 -->
	<package name="stuPkg" namespace="/student" extends="smsPkg">
		<action name="toReg" class="edu.fjnu.training.action.StudentAction" method="toReg">
			<result name="reg_page"  type="dispatcher">../jsps/student/reg_student.jsp</result>
		</action>
		<action name="work" class="edu.fjnu.training.action.StudentAction" method="work">
			
		</action>
		<action name="reg" class="edu.fjnu.training.action.StudentAction" method="reg">
			<result name="list_page">../jsps/student/list_student.jsp</result>
		</action>
	</package>
	
	<!-- 教师信息管理 -->
	<package name="teacherPkg" namespace="/teacher" extends="smsPkg">
		
	</package>
</struts>

reg_student.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ include file="/jsps/common-tags.jsp"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'reg_student.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="../../../css/style.css">  --%>
<%-- <link rel="stylesheet" type="text/css" href="/sms/css/style.css">   --%>
<%-- <link rel="stylesheet" type="text/css" href="<%=basePath%>/css/style.css">--%>
<link rel="stylesheet" type="text/css"
	href="<c:url value="/css/style.css"/>">
<script type="text/javascript"
	src="<c:url value="/js/common.js"></c:url>"></script>

</head>

<body>

	<h3>新生登记(2018年5月22日08:02:55)</h3>
	<s:form action="reg" namespace="/student" method="post" enctype="multipart/form-data">
		<img
			id="stuPhoto" style="float:right;" alt="学生图片"
			src="<c:url value="/pics/default.jpg"/>" width="160px" height="160px" />
		<!-- 学生信息 学号： -->
		<div>
			<label>学号:</label>
			<s:textfield name="stu.stuNo"></s:textfield>
		</div>
		<!-- 学生信息 密码： -->
		<div>
			<label>姓名:</label>
			<s:textfield name="stu.stuName"></s:textfield>
		</div>
		<div>
			<label>相片:</label>
			<s:file name="stuPic" onchange="$('stuPhoto').src=this.value"></s:file>
		</div>
		<div>
			<label>成绩:</label>
			<s:textfield name="stu.stuMark"></s:textfield>
		</div>
		<div>
			<label>性别:</label>
			<s:radio name="stu.stuSex" list="#{'ma':'男','fe':'女'}"></s:radio> 
		</div>
		<div>
			<label>爱好:</label> 
			<s:checkboxlist name="stu.stuHobbies" list="#{'cm':'爬山','rd':'阅读','sw':'游泳','rn':'跑步'}"></s:checkboxlist>
		</div>
		<div>
			<label>籍贯:</label>
			<s:select name="stu.stuOrigin" list="#{'xm':'厦门','fz':'福州','nd':'宁德','pt':'莆田'}"></s:select> 
		</div>
		<div>
			<label>备注:</label>
			<s:textarea name="stu.stuMemo"  rows="6" cols="60" ></s:textarea>
		</div>
		<div>
			<s:submit value="注册登记"/> 
		</div>
	</s:form>
	
	<a href="<c:url value="/smsMgr" />?act=main">首页</a>
	<%-- <jsp:include page="../../css/footer.jsp"></jsp:include>--%>
</body>
</html>