struts标签报错：The value '2.2.3' of element 'tlib-version' is not valid.
<tlib-version>2.2.3</tlib-version>
2.2.3改为2.2
这个数字格式是X.Y，而不是X.Y.Z
具体见https://issues.apache.org/jira/browse/WW-3299