struts 多文件上传

truts has detected an unhandled exception:
# Messages:  d:\upload\2.bmp (???????????)
Stacktraces
java.io.FileNotFoundException: d:\upload\2.bmp (???????????)    java.io.FileOutputStream.open(Native Method)
    java.io.FileOutputStream.(FileOutputStream.java:179)
    java.io.FileOutputStream.(FileOutputStream.java:70)
    com.ryb.action.UploadMoreAction.execute(UploadMoreAction.java:48)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)