struct-config.xml配置文件的解析

//定义了xml文件的版本和编码
<?xml version="1.0" encoding="UTF-8"?>
//配置文件中的元素必须按照下述doc指令中的dtd文档定义顺序书写，本例即遵从了dtd定义顺序，struct-config是整个xml的根元素，其他元素必须包含在内。
<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">
<struts-config>
//这个标签是用来配置数据源的，具体的配置方法我们可以在网上找一个实例进行查看，可以通过<set-property>设置driverClass、url、user、password等属性。
  <data-sources />
//子元素form-beans用来配置绑定到Action的各个FormBean的实例。每个FormBean实例用form-bans的子元素form-bean来定义。form-bean又分普通的FormBan和动态FormBean。参考该网址：http://www.cnblogs.com/panjun-Donet/articles/1181811.html
  <!-- 注册ActionForm -->
  <form-beans>
      <form-bean name="userForm" type="com.lyq.struts.form.UserForm"/>
      <form-bean name="medForm" type="com.lyq.struts.form.MedicineForm"/>
      <form-bean name="categoryForm" type="com.lyq.struts.form.CategoryForm"/>
      <form-bean name="sellDetailForm" type="com.lyq.struts.form.SellDetailForm"/>
  </form-beans>
//global-forwards用于配置全局转发，struts首先会在<action-mappings>元素中找对应的<forward>，若找不到，则到全局转发配置中找。它包含0个或多个<forward/>元素，格式如///下所示：<forward name="唯一的名称" path="指向资源的相对路径"/
  <global-exceptions />

  <!-- 全局跳转 -->
  <global-forwards>
      <forward name="login" path="/login.jsp" redirect="true"/>
      <forward name="buy" path="/sell/sell.do?command=add"/>
      <forward name="error" path="/error.jsp"/>
      <forward name="manage" path="/manager.jsp"/>
  </global-forwards>
// 该元素用于将Action元素定义到ActionServlet类中，它含有0到多个<action/>元素，其格式如下：
// scope：指定ActionForm Bean的作用域(session和request)，缺省为session。(可选)；

  <action-mappings>
      <!-- 用户登录 -->
    <action path="/login"
            type="com.lyq.struts.action.LoginAction"
            name="userForm"
            scope="request">
        <forward name="loginFail" path="/login.jsp"/>
    </action>
    <!-- 语言选择 -->
    <action path="/language"
            type="com.lyq.struts.action.LanguageAction"
            scope="request" />
    <!-- 类别 -->
    <action path="/baseData/category"
            type="com.lyq.struts.action.CategoryAction"
            name="categoryForm"
            scope="request"
            parameter="command">
        <forward name="paging" path="/baseData/category.do?command=paging" />
        <forward name="findAllSuccess" path="/baseData/category_list.jsp" />
        <forward name="edit" path="/baseData/category_add.jsp" />
        <forward name="categoryGraph" path="/baseData/category_graph.jsp" />
    </action>
    <!-- 药品 -->
    <action path="/baseData/med"
            type="com.lyq.struts.action.MedicineAction"
            name="medForm"
            scope="request"
            parameter="command">
        <forward name="addSuccess" path="/baseData/med.do?command=paging" />
        <forward name="findAllSuccess" path="/baseData/med_list.jsp" />
        <forward name="view" path="/baseData/med_view.jsp" />
        <forward name="add" path="/baseData/med_add.jsp" />
        <forward name="medUpdate" path="/baseData/med_update.jsp" />
        <forward name="medSave" path="/baseData/med_save.jsp" />
        <forward name="canSellMeds" path="/baseData/med_sell.jsp" />
    </action>
    <!-- 删除药品信息 -->
    <action path="/baseData/deleteMedicineAction"
            type="com.lyq.struts.action.DeleteMedicineAction"
            parameter="command">
        <forward name="findAllSuccess" path="/baseData/med.do?command=paging" />
    </action>
    <!-- 药品需求 -->
    <action path="/require/require"
            type="com.lyq.struts.action.RequireAction"
            name="medForm"
            scope="request"
            parameter="command">
        <forward name="addSuccess" path="/require/require.do?command=paging" />
        <forward name="findAllSuccess" path="/require/req_list.jsp" />
        <forward name="medUpdate" path="/require/req_update.jsp" />
        <forward name="medSave" path="/require/req_save.jsp" />
        <forward name="add" path="/require/req_add.jsp" />
        <forward name="view" path="/baseData/med_view.jsp" />
    </action>
    <!-- 删除药品需求信息 -->
    <action path="/require/deleteReqMedAction"
            type="com.lyq.struts.action.DeleteReqMedAction"
            parameter="command">
        <forward name="findAllSuccess" path="/require/require.do?command=paging" />
    </action>
    <!-- 销售 -->
    <action path="/sell/sell"
            type="com.lyq.struts.action.SellAction"
            name="sellDetailForm"
            scope="request"
            parameter="command">
        <forward name="add" path="/sell/sell_add.jsp" />
        <forward name="order" path="/sell/sell_order.jsp" />
        <forward name="paging" path="/sell/sell.do?command=paging" />
        <forward name="findAllSuccess" path="/sell/sell_list.jsp" />
        <forward name="sequence" path="/sell/sell_seq_list.jsp" />
    </action>
    <!-- 系统管理 -->
    <action path="/system/system"
            type="com.lyq.struts.action.SystemAction"
            name="userForm"
            scope="request"
            parameter="command">
        <forward name="userFind" path="/system/system.do?command=userFind" />
        <forward name="findAllSuccess" path="/system/user_list.jsp"/>
        <forward name="userEdit" path="/system/user_add.jsp"/>
    </action>
  </action-mappings>
//该元素用来定义资源文件,parameter="给定资源文件的全名"
/*

<message-resources parameter="给定资源文件的全名" classname="定义处理消息资源的类名的全名"  factory="定义MessageResourcesFactory类的全名"  key="定义绑定在这个资源包中的ServletContext的属性主键"  null=" 如果为true，则找不到消息key时，则返回null "/>

*/

  <message-resources parameter="com.lyq.struts.MessageResources" />
</struts-config>

plug-in

       该元素用于定义插件，可定义0到多个插件元素，最常见的plug-in为Struts的验证的插件，配置举例如下：

Eg1. Struts的验证的plug-in：

<plug-in className="org.apache.struts.validator.ValidatorPlugIn">

         <set-property property="pathnames"

                   value="/WEB-INF/validator-rules.xml, /WEB-INF/manager/validation.xml" />

         <set-property property="stopOnFirstError" value="false" />

</plug-in>

Eg2. Spring提供的载入插件配置：

<plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">

<set-property property="contextConfigLocation"

              value="/WEB-INF/applicationContext.xml, /WEB-INF/action-servlet.xml"/>

 </plug-in>