Struts2学习笔记之域属性的添加和访问

Struts2学习笔记
第八记：域属性的添加和访问

（1）、设置访问属性

1-1：通过ActionContext设置访问属性

public String execute(){

ActionContext act=ActionContext.getContext();

act.getApplication().put("application","this is application scope");

act.getSession().put("session","this is session scope");

act.put("request","this is request scope");

return "SUCCESS";

}

1-2：通过ServletActonContext设置属性

原理：获取到HttpServletRequest对象，利用setAtrribute()来实现。

public String requestAndServletContext(){
HttpServletRequest request=ServletActionContext.getRequest();

ServletContext servletContext=ServletActionContext.getServletContext();

servletContext.setAttributet("application","this is application scope");

request.getSession().setAttributet("session","this is session scope");

request.setAttributet("request","this is request scope");

return "SUCCESS";

}

（2）、访问设置的属性

在success.jsp页面中用EL表达式获取值：

${applicationScope.application}<br/>

${sessionScope.session}</br>

${requestScope.request}<br/>