Struts2框架的传值问题

从后台获取数据

get传值【确保action类中有getter（）方法】

ActionContext对象传值

a.获取session对象并调用：

ActionContext.getContext().getSession（）.put(key,value)；

b.获取request对象：

Map<String,object> request = ActionContext.getContext().get("request");
request.put(key,value);

3.ServletActionContext对象传值【是ActionContext的子类】

ServletActionContext.getRequest().setAttribute(key,value);

4 .直接访问servlet对象【request】——实现ServletRequestWare接口

public class LoginAction implements Action,ServletRequestAware{
private String userName;
private String passWord;
**private HttpServletRequest request;**

public HttpServletRequest getRequest() {
return request;
}
public void setRequest(HttpServletRequest request) {
this.request = request;
}
......