struts2 java注解一直出错 @Result这个应该是引用哪个包啊?

package com.test1;
import org.apache.struts2.convention.annotation.Result;
import com.opensymphony.xwork2.ActionSupport;
@Result( value="/HelloWorld.jsp",name="SUCCESS")
public class HelloWorld extends ActionSupport {
private static final String GREETING="Hello";

public String execute(){
    setCustomGreeting(GREETING+" "+getName());
    return "SUCCESS";
}

private String name;
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getCustomGreeting() {
    return customGreeting;
}
public void setCustomGreeting(String customGreeting) {
    this.customGreeting = customGreeting;
}

private String customGreeting;

}

@org.apache.struts2.convention.annotation.Result

将异常堆栈信息贴出来！