http://www.aygfsteel.com/nokiaguy/archive/2008/04/16/193287.html
<s:form action="submit.action" >
<s:textfield name="param" label="content"/>
<s:submit name="method1" value="方法一" method="method1"/>
<s:submit name=" method1" value="方法二" method="method1" />
</s:form>