1. 访问和添加request/session/application属性
如果只是往request/session/application中设置属性,可以用下面的方式
Java代码 、
ActionContext ctx = ActionContext.getContext();
- ctx.getApplication().put("app", "应用范围");
- ctx.getSession().put("ses", "session范围");
- ctx.put("req", "request范围");
- ctx.put("names", Arrays.asList("老张", "老黎", "老方"));
-
ActionContext ctx = ActionContext.getContext();
ctx.getApplication().put("app", "应用范围");//往ServletContext里放入app
ctx.getSession().put("ses", "session范围");//往session里放入ses
ctx.put("req", "request范围");//往request里放入req
ctx.put("names", Arrays.asList("老张", "老黎", "老方"));
jsp页面上获取方式
Java代码
${applicationScope.app}<br>
- ${sessionScope.ses}<br>
- ${requestScope.req}<br>
${applicationScope.app}<br>
${sessionScope.ses}<br>
${requestScope.req}<br>
2. struts2中如何获取httpServletRequest/HttpSession/ServletContext/HttpServletResponse对象
方法一,通过ServletActionContext类获取:(推介使用)
Java代码
public String rsa() throws Exception{
- HttpServletRequest request = ServletActionContext.getRequest();
- ServletContext servletContext = ServletActionContext.getServletContext();
- request.setAttribute("req", "请求范围属性");
- request.getSession().setAttribute("ses", "会话范围属性");
- servletContext.setAttribute("app", "应用范围属性");
- HttpServletResponse response = ServletActionContext.getResponse();
- return "message";
- }
public String rsa() throws Exception{
HttpServletRequest request = ServletActionContext.getRequest();
ServletContext servletContext = ServletActionContext.getServletContext();
request.setAttribute("req", "请求范围属性");
request.getSession().setAttribute("ses", "会话范围属性");
servletContext.setAttribute("app", "应用范围属性");
HttpServletResponse response = ServletActionContext.getResponse();
return "message";
}
方法二,实现指定接口,由struts框架注入:
Java代码
import com.opensymphony.xwork2.ActionContext;
- public class HelloWorldAction2 implements ServletContextAware,ServletRequestAware,ServletResponseAware{
- private HttpServletRequest request ;
- private HttpServletResponse response ;
- private ServletContext servletContext ;
- public void setServletContext(ServletContext context) {
-
- this.servletContext = context ;
- }
- public void setServletRequest(HttpServletRequest request) {
- this.request = request ;
- }
- public void setServletResponse(HttpServletResponse response) {
- this.response = response ;
- }
- }