自定义 BaseAction

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class BaseAction extends ActionSupport{

    private static final long serialVersionUID = 678375012157357604L;

    protected static final String BACK = "back";
    protected static final String BACK_TO_ZY = "backToZy";
    protected static final String BACK_TO_HISTORY = "backToHistory";

    /**
     * 获得request
     * 
     * @return
     */
    public static HttpServletRequest getRequest() {
        return ServletActionContext.getRequest();
    }

    /**
     * 获得response
     * 
     * @return
     */
    public static HttpServletResponse getResponse() {
        return ServletActionContext.getResponse();
    }

    /**
     * 获得session
     * 
     * @return
     */
    public static HttpSession getSession() {
        return getRequest().getSession();
    }

    /**
     * 获得servlet上下文
     * 
     * @return
     */
    public static ServletContext getServletContext() {
        return ServletActionContext.getServletContext();
    }

    /**
     * 获得绝对路径
     * @param path
     * @return
     */
    public static String getRealPath(String path) {
        return getServletContext().getRealPath(path);
    }
}