strut获取作用对象的两种方式

方法一、使用HttpServletRequest获取。

方法二、使用ActionContext获取。

案例：

package com.caokaiyuan.action;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.caokaiyuan.vo.UserVO;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport implements ModelDriven<UserVO>

{
private static final long serialVersionUID = 1L;

private UserVO user = new UserVO();

@Override
public String execute() throws Exception
{
//方法一
HttpServletRequest request = ServletActionContext.getRequest();
request.setAttribute("req", "request访问");
request.getSession().setAttribute("ses", "session访问");

//方法二
ActionContext  ac = ActionContext.getContext();
ac.put("req1", "req1访问");
ac.getSession().put("ses1", "ses1访问");

if (user.getUsername().equals("admin") && user.getPassword().equals("admin"))
{
return "success";
}
else 
{
return "error";
}
}

@Override
public UserVO getModel()
{
return user;
}

public UserVO getUser() {
return user;
}

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

}