Struts2框架代碼開發流程小結

因爲工作臨時需要，自己接觸並學習使用了Struts框架。下面記錄下自己在Struts2框架下的代碼開發流程

1、配置web.xml文件

web.xml配置文件是一種J2EE配置文件，決定servlet容器的HTTP元素需求如何進行處理。它嚴格來說不是一個Struts2 配置文件，但它是Struts2 運作所需要進行配置的文件。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee"  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
   <display-name>itcastActiviti</display-name>
   <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>*.action</url-pattern>
  </filter-mapping>
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
</web-app>

注意，我們將Struts2 過濾器映射到  /*.action ，這意味着只有*.action的url纔會被Struts過濾器解析。

2、配置struts.xml文件

struts.xml文件包含有隨着Actions的開發 將要修改的配置信息。它可用於覆蓋應用程序的默認設置，例如：struts.devMode=false 以及其他定義爲屬性文件的設置。這個文件可在resource文件夾下創建。

<?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>
    <!-- 配置模式爲開發模式，自動加載struts.xml和顯示錯誤提示信息 -->
    <constant name="struts.devMode" value="false" />
    <!-- 設置頁面主題爲簡單主題，去掉struts2開發提供的樣式 -->
    <constant name="struts.ui.theme" value="simple" />

    <package name="default" namespace="/" extends="struts-default">
    	<!-- 全局結果視圖 -->
    	<global-results>
    		<result name="login" type="redirect">
    			login.jsp
    		</result>
    	</global-results>
        <action name="meetingAction_*" class="meetingAction" method="{1}">
    	    <result name="getlist">WEB-INF/views/meeting/list.jsp</result>
        	<result name="list" type="stream">
			    <param name="contentType">text/html</param>
       			<param name="inputName">inputStream</param>
            </result> 
            <result name="input">WEB-INF/views/meeting/input.jsp</result>
            <result name="update" type="redirectAction">
        		<param name="actionName">meetingAction_getlist.action</param>
        	</result>
            <result name="save" type="redirectAction">
        		<param name="actionName">meetingAction_getlist.action</param>
        	</result>
        	<result name="delete" type="redirectAction">
        		<param name="actionName">meetingAction_getlist.action</param>
        	</result>       	
        	<result name="onstafflist">WEB-INF/views/meeting/onstafflist.jsp</result>
        	<result name="checkApplyLeave" type="stream">
			    <param name="contentType">text/html</param>
       			<param name="inputName">inputStream</param>
            </result>
        </action>
        <action name="dutyScheduleAction_*" class="dutyScheduleAction" method="{1}">
    	   <!--  <result name="getlist">WEB-INF/views/meeting/calendar.jsp</result> -->
    	    <result name="getlist">WEB-INF/views/dutyschedule/list.jsp</result>
    	    <result name="list" type="stream">
			    <param name="contentType">text/html</param>
       			<param name="inputName">inputStream</param>
            </result> 
    	     <result name="getadminlist">WEB-INF/views/meeting/calendar_admin.jsp</result>
        	<result name="show" type="stream">
			    <param name="contentType">text/html</param>
       			<param name="inputName">inputStream</param>
            </result> 
            <result name="showevents" type="stream">
			    <param name="contentType">text/html</param>
       			<param name="inputName">inputStream</param>
            </result>
           <result name="save" type="redirectAction">
        		<param name="actionName">dutyScheduleAction_getlist.action</param>
        	</result>
        	<result name="update" type="redirectAction">
        		<param name="actionName">dutyScheduleAction_getlist.action</param>
        	</result>
            <result name="delete" type="redirectAction">
        		<param name="actionName">dutyScheduleAction_getlist.action</param>
        	</result>
            <result name="validAvailable" type="stream">
			    <param name="contentType">text/html</param>
       			<param name="inputName">inputStream</param>
            </result>  	
        	
        </action>
    	<action name="loginAction_*" class="loginAction" method="{1}">
    		<!-- <result name="success">WEB-INF/views/main.jsp</result> -->
        	 <result name="success">bgpt/main_bgpt.jsp</result>
        	<!--  <result name="success" type="redirectAction">
        		<param name="actionName">holidayApplyAction_input.action</param>
        	</result> -->
        	<result name="top">WEB-INF/views/top.jsp</result>
        	<result name="left">WEB-INF/views/left.jsp</result>
        	<result name="welcome">WEB-INF/views/welcome.jsp</result>
        </action>
    </package>
</struts>

補充說明：struts.xml文件實現接口返回信息和頁面關聯的一個配置文件

3、其他配置，如數據庫配置、activiti引擎配置等

4、開始編寫代碼，案例如下：

package cn.china.xxx;

public class loginAction{
   private String name;

   public String success() throws Exception {
      return "success";
   }
}