struct_config.xml中action/set-property標籤的用法

struct中action-mappings/action可以擁有set-property子標籤，這裏描述它的用法。

要使用action-mappings/action/set-property，需要編寫ActionMapping子類，並給action-mappings 標籤加上type屬性，屬性值就是我們編寫的字類。這樣當action的execute享有客戶操作時將得到我們編寫的ActionMapping事例。

我們編寫的ActionMapping要具有action-mappings/action/set-property所設置的所有屬性。如果action-mappings/action擁有set-property子標籤，那麼execute方法獲得的ActionMapping事例就擁有set-property所設置的屬性值。

例:

1.struts_config.xml

<action-mappings type="testActionMapping">
    <action name="loginActionForm" path="/login" scope="request" type="testAction">
      <set-property property="name" value="larrin" />
     </action>
<action-mappings>

2.testActionMapping

   public testActionMapping extends ActionMapping
   {
      ....
      private String name;
      String getName(){return name;}
      void setName(String val){name = val;}
      ...
   }

3.testAction
   public testAction extends Action
   {
     public ActionForward execute(ActionMapping actionMapping,
                                                           ActionForm actionForm,
                                                           HttpServletRequest httpServletRequest,
                                                           HttpServletResponse httpServletResponse)
     {
         testActionMapping  testForm = (testActionMapping )actionForm;
         String name = testForm.getName();
     }
   }