mapping.findForward("error")获取的是struts-config.xml配置文件里面<forward name="error">

平时编写代码都没注意到，感觉挺有意思，因此记录下。

struts1.3中Action里面的 mapping.findForward("error")获取的是struts-config.xml配置文件里面<forward name="error"></forward>

如下：error必须要在struts-config.xml中配置，否则forward = null。

Java代码：

public class LoginAction extends Action {

	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		UserForm userForm = (UserForm) form;
		//这个error必须要在struts-config.xml中配置，否则 mapping.findForward("error") 获取的为null
        ActionForward forward = mapping.findForward("error");
		return forward;
	}
}

 

 struts-config.xml配置文件，在对应的action下必须要配置 <forward name="error" ></forward>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
          "http://struts.apache.org/dtds/struts-config_1_3.dtd">

<struts-config>
<form-beans>  
        <form-bean  
            name="userform"  
            type="com.hsp.form.UserForm"/>  
    </form-beans>  
  
    <action-mappings>  
        <action  
            path="/login"  
            type="com.hsp.action.LoginAction"  
            name="userform"  
            >
           <forward name="error" path="/error.jsp"></forward>         
        </action>  
    </action-mappings>  
  
</struts-config>