系列教程（20）：使用EventDispatchAction类处理一个form多个submit
与LookupDispatchAction、DispatchAction不同，MappingDispatchAction类并不通过请求参数来指定动作，而是将一个Struts动作对应于一个Action方法。下面的例子演示了如何使用MappingDispatchAction类来将Struts动作和Action方法相对应。
与LookupDispatchAction、DispatchAction不同，MappingDispatchAction类并不通过请求参数来指定动作，而是将一个Struts动作对应于一个Action方法。下面的例子演示了如何使用MappingDispatchAction类来将Struts动作和Action方法相对应。
Action类的实现代码：
package
action;
import org.apache.struts.actions.MappingDispatchAction;
public class MyMappingDispatchAction extends MappingDispatchAction
{
public ActionForward pdf(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
{
// 生成pdf文件
}
public ActionForward html(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
{
// 生成html文件
}
public ActionForward unspecified(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
{
// 处理默认动作
}
}
import org.apache.struts.actions.MappingDispatchAction;
public class MyMappingDispatchAction extends MappingDispatchAction
{
public ActionForward pdf(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
{
// 生成pdf文件
}
public ActionForward html(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
{
// 生成html文件
}
public ActionForward unspecified(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
{
// 处理默认动作
}
}
上面的代码有两个Action方法：pdf和html，分别用来生成pdf和html文件。还有一个unspecified方法用来处理默认动作。
我们可以使用如下的代码来配置MyMappingDispatchAction类：
<
action
path
="/pdf"
type
= "action.MyMappingDispatchAction"
parameter
="pdf"
/>
< action path ="/html" type = "action.MyMappingDispatchAction" parameter ="html" />
< action path ="/html" type = "action.MyMappingDispatchAction" parameter ="html" />
可以通过如下的URL来访问pdf和html动作，分别会调用MyMappingDispatchAction类的pdf和html方法
