struts2添加和訪問request、session、application屬性

struts2添加request、session、application屬性

第一種方法：

ActionContext ctx = ActionContext.getContext();
	ctx.put("r1", list);//向request中添加屬性
	ctx.getSession().put("s1",list);//向session中添加屬性
	ctx.getApplication().put("a1", list);//向application中添加屬性

HttpSession session =null;
		session = ServletActionContext.getRequest().getSession();
		if(session.getAttribute("user") != null) {
			session.removeAttribute("user");
		}
		session.setAttribute("user", user);
Map<String,Object> session = null;
		session = ActionContext.getContext().getSession();
		if(session.containsKey("user")){
			session.remove("user");
		}
		
		session.put("user", user);

第二種方法：

使用 ServletRequestAware接口

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();
	}
	
}

struts2訪問request、session、application屬性

第一種方法：

使用struts tag：

<s:property value="#request.r1"/> 
<s:property value="#session.s1"/> 
<s:property value="#application.a1"/> 

第二種方法：

使用jsp對象

<%=request.getAttribute("r1") %> <br />
<%=session.getAttribute("s1") %> <br />
<%=application.getAttribute("a1")%> <br />