Struts2框架代码开发流程小结

亦凉 2021-12-23 06:11 324阅读 0赞

因为工作临时需要，自己接触并学习使用了Struts框架。下面记录下自己在Struts2框架下的代码开发流程

### 1、配置web.xml文件 ###

web.xml配置文件是一种J2EE配置文件，决定servlet容器的HTTP元素需求如何进行处理。它严格来说不是一个Struts2 配置文件，但它是Struts2 运作所需要进行配置的文件。

<?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，我们将Struts2 过滤器映射到 ** /\*.action **，这意味着只有**\*.action**的url才会被Struts过滤器解析。

### 2、配置struts.xml文件 ###

**struts.xml**文件包含有随着Actions的开发 将要修改的配置信息。它可用于覆盖应用程序的默认设置，例如：struts.devMode=false 以及其他定义为属性文件的设置。这个文件可在**resource**文件夹下创建。

<?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>
        
        <constant name="struts.devMode" value="false" />
        
        <constant name="struts.ui.theme" value="simple" />
    
        <package name="default" namespace="/" extends="struts-default">
        	
        	<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/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">bgpt/main_bgpt.jsp</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>

补充说明：struts.xml文件实现接口返回信息和页面关联的一个配置文件

### 3、其他配置，如数据库配置、activiti引擎配置等 ###

### 4、开始编写代码，案例如下： ###

package cn.china.xxx;
    
    public class loginAction{
       private String name;
    
       public String success() throws Exception {
          return "success";
       }
    }