求助 struts结构 jsp得不到传值
各位大哥帮忙看一下问题在哪
程序目的：jsp中接收Action的赋值。相关代码如下：
1.AreaAction.java中赋值
Collection coll = new ArrayList();
coll = db.select(..);
if (coll == null || coll.isEmpty())
{return actionMapping.findForward( "fail ");
}else
{
request.setAttribute( "Area ", coll);
return actionMapping.findForward( "success ");
}
2.jsp4.jsp中获取 Area的值
<logic:iterate id= "area " name= "Area " type= "com.cargo1.model.Area " scope= "request ">
<tr valign= "top " bgcolor= "#FFFFFF ">
<td height= "20 " align= "center " bgcolor= "#FFFFFF "> <bean:write name= "area " property= "name " filter= "true "/> </td>
<td height= "20 " align= "center " bgcolor= "#FFFFFF "> <bean:write name= "area " property= "resume " filter= "true "/> </td>
</tr>
</logic:iterate>
3.struts-config.xml配置action-mapping
<action-mappings type= "org.apache.struts.action.ActionMapping ">
<action path= "/areaAction " type= "com.cargo1.control.AreaAction " validate= "false " scope= "request ">
<forward name= "success " path= "/jsp4.jsp " redirect= "true " />
</action>
<action path= "/areaAction " type= "com.cargo1.control.AreaAction " validate= "false ">
<forward name= "fail " path= "/jsp1.jsp " redirect= "true " />
</action>
</action-mappings>
问题：运行jsp4.jsp时从request中找不到Area，错误提示如下：
“javax.servlet.ServletException: Cannot find bean Area in scope null”
那位大哥帮帮忙给小弟解释一下，万分感谢
[解决办法]
request.setAttribute( "Area ", coll);
<logic:iterate id= "area " name= "Area " >
<tr valign= "top " bgcolor= "#FFFFFF ">
<td height= "20 " align= "center " bgcolor= "#FFFFFF "> <bean:write name= "area " property= "name " filter= "true "/> </td>
<td height= "20 " align= "center " bgcolor= "#FFFFFF "> <bean:write name= "area " property= "resume " filter= "true "/> </td>
</tr>
</logic:iterate>
<action path= "/areaAction " type= "com.cargo1.control.AreaAction " validate= "false " scope= "request ">
<forward name= "success " path= "/jsp4.jsp " />
</action>
<action path= "/areaAction " type= "com.cargo1.control.AreaAction " validate= "false ">
<forward name= "fail " path= "/jsp1.jsp " />
</action>
[解决办法]
Collection coll = new ArrayList();
coll = db.select(..);
if (coll == null || coll.isEmpty())
{return actionMapping.findForward( "fail ");
}else
{
request.setAttribute( "Area ", coll);
return actionMapping.findForward( "success ");
}
2.jsp4.jsp中获取 Area的值
<logic:iterate id= "area " name= "Area " scope= "request ">
<tr valign= "top " bgcolor= "#FFFFFF ">
<td height= "20 " align= "center " bgcolor= "#FFFFFF "> <bean:write name= "area " property= "name " /> </td>
<td height= "20 " align= "center " bgcolor= "#FFFFFF "> <bean:write name= "area " property= "resume " /> </td>
</tr>
</logic:iterate>
3.struts-config.xml配置action-mapping
<action-mappings type= "org.apache.struts.action.ActionMapping ">
<action path= "/areaAction " type= "com.cargo1.control.AreaAction " validate= "false " scope= "request ">
<forward name= "success " path= "/jsp4.jsp " />
</action>
<action path= "/areaAction " type= "com.cargo1.control.AreaAction " validate= "false ">
<forward name= "fail " path= "/jsp1.jsp " />
</action>
</action-mappings>
你这么改
