【Struts框架】第一节Action-struts访问request等引用方法三和四

package cn.edu.hpu.getValue;

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

import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class LoginAction3 extends ActionSupport {

private HttpServletRequest request;
private HttpSession session;
private ServletContext application;

public LoginAction3(){
request=ServletActionContext.getRequest();
session=request.getSession();
application=session.getServletContext();
}

public String execute(){
request.setAttribute("r1", "r1");
session.setAttribute("s1", "s1");
application.setAttribute("a1", "a1");
return SUCCESS;
}
}

package cn.edu.hpu.getValue;

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

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.ServletRequestAware;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction4 extends ActionSupport implements ServletRequestAware{

private HttpServletRequest request;
private HttpSession session;
private ServletContext application;

public String execute(){
request.setAttribute("r1", "r1");
session.setAttribute("s1", "s1");
application.setAttribute("a1", "a1");
return SUCCESS;
}

@Override
public void setServletRequest(HttpServletRequest request) {
this.request=request;
this.session=request.getSession();
this.application=session.getServletContext();

}

}