原因:xwork.xml中
1 <interceptor-stack name="uploadStack">
2 <interceptor-ref name="myFileUpload"></interceptor-ref>
3 <interceptor-ref name="defaultStack"></interceptor-ref>
4 </interceptor-stack>
2 <interceptor-ref name="myFileUpload"></interceptor-ref>
3 <interceptor-ref name="defaultStack"></interceptor-ref>
4 </interceptor-stack>
2,3的順序顛倒了,這樣在fileupload后沒有攔截器將request中的file放到action中
解決:2,3顛倒一下,將3放在最后即可