我配置的struts2禁止重复提交表单为什么不好使

struts.xml配置文件

Java代码

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

















/WEB-INF/content/error.jsp




action

Java代码
@ParentPackage(value = "struts-interceptor1")
@Namespace("/test")
public class TestAction extends BaseAction {

/**
*
*/
private static final long serialVersionUID = 1L;

private User user;

public User getUser() {
return user;
}

public void setUser(User user) {
this.user = user;
}

public String t() {
System.out.println(user);
return "t";
}
public String d(){
return "t";
}

}

现在的问题是一运行d这个方法就直接跳转到error.jsp页，后台报
2010-04-08 18:09:07,819 [http-8080-1] WARN [org.apache.struts2.util.TokenHelper] - Could not find token name in params.