求助！JSF中的x:inputFileUpload 空指针问题
求助！x:inputFileUpload抛出空指针异常  
这是JSP页面部分代码
<x:inputFileUpload   id= "myFileId "   value= "#{addCrsRoom.upfile} "
storage= "file "   required= "true "   />
<hanelGrid   columns= "2 "   border= "1 "   width= "60% ">
<h:commandButton   type= "submit "   value= "提交 "
action= "#{addCrsRoom.insert} "> </h:commandButton>
<h:commandButton   type= "reset "   value= "重置 "> </h:commandButton>
</hanelGrid>

配置文件  
<?xml   version= "1.0 "   encoding= "UTF-8 "?>
<!DOCTYPE   faces-config   PUBLIC   "-//Sun   Microsystems,   Inc.//DTD   JavaServer   Faces   Config   1.1//EN "   "http://java.sun.com/dtd/web-facesconfig_1_1.dtd ">

<faces-config>
<managed-bean>
<managed-bean-name> addCrsRoom </managed-bean-name>
<managed-bean-class>
neusoft.action.manage.AddNewCr
</managed-bean-class>
<managed-bean-scope> session </managed-bean-scope>
</managed-bean>

<navigation-rule>
<from-view-id> /pages/manage/addcrs.jsp </from-view-id>
<navigation-case>
<from-outcome> successadd </from-outcome>
<to-view-id> /pages/common/success.jsp </to-view-id>
</navigation-case>
<navigation-case>
<from-outcome> fail </from-outcome>
<to-view-id> /pages/common/fail.jsp </to-view-id>
</navigation-case>


</navigation-rule>
</faces-config>

BEAN文件部分代码
private   UploadedFile   upfile;


public   UploadedFile   getUpfile()   {
return   upfile;
}
public   void   setUpfile(UploadedFile   upfile)   {
this.upfile   =   upfile;
}

System.out.println( "1 ");
System.out.println(upfile.getName());
System.out.println(getFileName(upfile.getName()));
InputStream   is   =   upfile.getInputStream();
System.out.println( "2 ");
String   filename   =   getFileName(upfile.getName());
System.out.println(filename);
FileOutputStream   fos   =   new   FileOutputStream( "D:/ "   +   filename);
System.out.println( "over ");
int   isleft;
while   ((isleft   =   is.read())   !=   -1)
fos.write(isleft);
System.out.println( "3 ");
is.close();
fos.close();
System.out.println( "4 ");


在console里面   只能输出一个1   还有就是空指针异常了

我只是想用JSF在前台读入一张图然后存到指定位置
高手指教错在哪  
或者还有没有其他用JSF解决上传存储图片的方法

谢谢各位！



------解决方案--------------------
richfaces
------解决方案--------------------
System.out.println( "1 ");
System.out.println(upfile.getName());
输出一个1后执行System.out.println(upfile.getName());

这里解释下空指针出现的可能性：
如果有一个空的值或者对象，是不能点出他的属性，因为空是没有属性的，因此到这句出现空指针异常很有可能是本类的upfile为空(或者upfile对象没有初始化)