问一个struts2的问题,很奇怪

action中,有个方法肯定会被执行很奇怪,谁能帮我看看
代码如下:
@Action(value="/Action/xxxx"
,results={@Result(
type="json"
,params={"ignoreHierarchy"
,"false"
,"excludeNullProperties"
,"true"
,"excludeProperties"
,"actionErrors,actionMessages,errorMessages,fieldErrors,locale,errors"}
)}
)
public String xxx() throws Exception{
......//这个方法肯斯能够会执行
}