你的 SuperAction 類是否沒有初始化 session 啊，看下面，在?setServletRequest() 有給session 輔助哦：

package action;

import javax.servlet.ServletContext;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.struts2.interceptor.ServletRequestAware;

import org.apache.struts2.interceptor.ServletResponseAware;

import org.apache.struts2.util.ServletContextAware;

import com.opensymphony.xwork2.ActionSupport;

//所有Action動作的父類

public class SuperAction extends ActionSupport implements ServletRequestAware,ServletResponseAware,ServletContextAware {

/**

*?

*/

private static final long serialVersionUID = 7727505312022359301L;

protected HttpServletRequest request; ?//請求對象

protected HttpServletResponse response; ?//響應對象

protected HttpSession session; ?//會話對象

protected ServletContext application; ?// 全局對象

@Override

public void setServletContext(ServletContext application) {

this.application = application;

}

@Override

public void setServletResponse(HttpServletResponse response) {

this.response = response;

}

@Override

public void setServletRequest(HttpServletRequest request) {

this.request = request;

this.session = this.request.getSession();

}

}