struts中操作request,session

在Action类中操作request,session

方法一、利用ActionContext.getContext().get("request");

//返回的是Map集合
Map<String,Object> request = (Map<String,Object>)ActionContext.getContext().get("request");
//放入request
request.put(key, value);
//取出
request.get("key");

Map<String,Object> session = ActionContext.getContext().getSession();
session.put(key, value);
session.get(key);

方法二、使用ServletActionContext.getRequest();

//返回的是HttpServletRequest
HttpServletRequest request = ServletActionContext.getRequest();
//setsetAttribute放入
request.setAttribute(arg0, arg1);
//etAttribute取出
request.getAttribute(arg0)

//生成Session需要先生成Request
HttpServletRequest req = ServletActionContext.getRequest();
//再用request.getSession();生成session
HttpSession session = req.getSession();
session.setAttribute(arg0, arg1);
session.getAttribute(arg0);

法三、使用RequestAware,SessionAware接口

1.实现这两个接口

public class NewsAction extends ActionSupport implements RequestAware,SessionAware {}

2.定义两个成员变量

private Map<String,Object> session;
private Map<String,Object> request;

3.重写接口中的方法。

@Override
    public void setRequest(Map<String, Object> arg0) {
        this.request = arg0;

    }
    @Override
    public void setSession(Map<String, Object> arg0) {
        // TODO Auto-generated method stub
        this.session = arg0;
    }

4.使用session.put(),session.get(),request.put(),request.get()方法实现

//放入
request.put(key, value);
//取出
request.get("key");

session.put(key, value);
session.get(key);