javascript 在 Struts 1.2 中使用 mapping.findForward 转发
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Forwarding using mapping.findForward in Struts 1.2
提问by user2473430
public class MyAction extends Action
{
public ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {
String status="success";
HttpSession session = request.getSession(true);
System.out.println("My Action---setting key value");
request.getSession().setAttribute("key1","check");
//response.sendRedirect("http://localhost:9080/FamiliarPortal/jsp/inicio.jsp");
return mapping.findForward(status);
}
}
In Struts-config.xml, the following is added:
在 中Struts-config.xml，添加了以下内容：
<action path="/myAction" type="iusa.ubicacel.actions.MyAction" validate="false" >
<forward name="success" path="/jsp/inicio.jsp"/>
</action>
In web.xml, the following is added:
在 中web.xml，添加了以下内容：
<servlet>
<servlet-name>GetFAP</servlet-name>
<servlet-class>iusa.ubicacel.actions.map.GetFAP</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>GetFAP</servlet-name>
<url-pattern>/GetFAP</url-pattern>
</servlet-mapping>
In inicio.jsp, the following is added:
在 中inicio.jsp，添加了以下内容：
<BODY onload="requestXML('<%=reqURL %>');">
<table border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td align="center" valign="middle">
<div id="mapdiv" style="width: 1000px; height:700px"></div>
</td>
</tr>
</table>
</BODY>
The function requestXMLis as follows:
功能requestXML如下：
function requestXML(reqURL)
{
alert("calling requestXML"+reqURL);
var url = "../GetFAP?requestURL=" + reqURL;
alert("calling requestXML"+url);
xmlhttpUbi = FAPXMLHttpRequest();
xmlhttpUbi.open("POST", url, true); // async
alert("after calling");
xmlhttpUbi.onreadystatechange = obtainFAPLocation;
xmlhttpUbi.send(null);
}
The above code is not calling the GetFAP servlet when using mapping.findForward. But when I used response.sendRedirect("entire jsp path")it is calling the servlet.
上面的代码在使用mapping.findForward. 但是当我使用response.sendRedirect("entire jsp path")它时正在调用 servlet。
Can anyone tell me what I am doing wrong here?
谁能告诉我我在这里做错了什么？
采纳答案by Dave Newton
You are using a relative URL instead of an absolute URL.
您使用的是相对 URL 而不是绝对 URL。
When you render the JSP directly, the ../GetFAPmapping works because you mustmove "up" a level up from the /jspdirectory.1
当您直接呈现 JSP 时，../GetFAP映射会起作用，因为您必须从/jsp目录“上移”一个级别。1
When you render the JSP from an action, you're moving a level up from the action'spath, i.e., there's no more /jspdirectory in the URL to move up from.
当您从一个动作呈现 JSP 时，您从动作的路径上移了一个级别，即/jspURL 中没有更多的目录可以从.
This is among the many reasons why using relative paths can be a bad idea.
这是使用相对路径可能是一个坏主意的众多原因之一。
1JSP files should live in the WEB-INFdirectory to avoid direct client access.
1JSP 文件应位于该WEB-INF目录中，以避免客户端直接访问。
