Struts 替代 Spring MVC 模型

发布于 2024-09-30 16:05:30 字数 246 浏览 2 评论 0原文

嘿，我正在使用 Spring MVC，并且习惯于“发送”DTO 到视图而不直接填充 servlet 请求，这是非常灵活和有效的。我正在尝试弄清楚如何在 Struts 中执行类似的操作，因为据我所知，“发送”DTO 进行查看的唯一方法是通过请求调度程序，其中 servlet 请求以键值样式填充 DTO由程序员手动操作。

与 Spring MVC 相比，这导致视图层 (JSP) 中有太多逻辑。

这是 DTO 从处理程序传输到视图层的唯一方法吗？

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小伙你站住 2024-10-07 16:05:30

一般来说，我在 Struts 中看到的完成方式是通过 Form 对象。该表单类扩展了 ActionForm。然后在 struts-config.xml 中将此表单定义为表单 bean。然后在操作类 bean 定义中添加对表单 bean 的引用。然后在 jsp 中重新引用表单以从 DTO 获取数据。

例如：-

The Action class:

public class SomeAction extends DispatchAction {
 public ActionForward someRequest(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)
            throws Exception {
  SomeForm someForm = ( SomeForm) form;
  List<SomeDTO> someList = populateDto();
  someForm.setSomeList(someList);
  return mapping.findForward("someAction");

}
The Form class:

public class SomeForm extends ActionForm{

   List<SomeDTO> someList;
   //getter and setters for someList
}

StrutsConfig:

<form-beans>
    <form-bean name="someForm" type="my.forms.SomeForm" />
</form-beans>

<action path="/someRequest"
            type="my.actions.SomeAction"
            name="someForm" scope="request" >
<forward name="someAction" path="goesSomeWhere" />

</action>

View:

<c:forEach items="${someForm.someList}" var="someThing" varStatus="someCounter">
    <c:out value="${someThing.foo}" /> <!-- assuming foo is a member in SomeThing DTO -->
</c:forEach>

Generally the way I have seen it being done in Struts is via Form objects. This form class extends ActionForm. Then in the struts-config.xml you define this form as a a form bean. Then add a reference to the form bean in the action class bean definition. Then in the jsp you rerefence the form to get data from the DTO.

For example:-

The Action class:

public class SomeAction extends DispatchAction {
 public ActionForward someRequest(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)
            throws Exception {
  SomeForm someForm = ( SomeForm) form;
  List<SomeDTO> someList = populateDto();
  someForm.setSomeList(someList);
  return mapping.findForward("someAction");

}
The Form class:

public class SomeForm extends ActionForm{

   List<SomeDTO> someList;
   //getter and setters for someList
}

StrutsConfig:

<form-beans>
    <form-bean name="someForm" type="my.forms.SomeForm" />
</form-beans>

<action path="/someRequest"
            type="my.actions.SomeAction"
            name="someForm" scope="request" >
<forward name="someAction" path="goesSomeWhere" />

</action>

View:

<c:forEach items="${someForm.someList}" var="someThing" varStatus="someCounter">
    <c:out value="${someThing.foo}" /> <!-- assuming foo is a member in SomeThing DTO -->
</c:forEach>

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