struts2 Action获取request，session，application

àì夳堔傛蜴生んèń 2022-09-25 09:24 184阅读 0赞

a.利用工具类 ActionContext(获得Map类型的request，session等)，ServletActionContext(获得封装的request，session等)
     	public class ScopeAction{
    
    		public String execute(){
    		ActionContext ac = ActionContext.getContext();
    		ac.getSession();
    		ac.getApplication();
    		//或者使用如下方式得到request，session
    		Map<String,Object> request = (Map<String,Object>)ac.get("request");
    		request.put("hello","hello world");
    		ac.get("session");
    		HttpServletRequest httpRequest = ServletActionContext.getRequest();
    		}
    	}
    b.以Aware接口方式注入******************推荐使用框架提供一系列的Aware接口，
     import java.util.Map;
    
    import javax.servlet.ServletContext;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpSession;
    
    import org.apache.struts2.interceptor.RequestAware;
    import org.apache.struts2.interceptor.ServletRequestAware;
    import org.apache.struts2.interceptor.SessionAware;
    import org.apache.struts2.util.ServletContextAware;
    
    public class BaseAction implements RequestAware,SessionAware,ServletRequestAware,ServletContextAware{
        public  Map<String,Object>request;
        public Map<String,Object>session;
        public HttpServletRequest httpRequest;
        public HttpSession httpSession;
        public ServletContext application;
    
        public void setRequest(Map<String,Object>request){
            this.request = request;
        }
        public void setSession(Map<String,Object>session){
            this.session = session;
        }
        
        public void setServletContext(ServletContext servletContext) {
            this.application = servletContext;
        }
        
        public void setServletRequest(HttpServletRequest httpRequest) {
            this.httpRequest = httpRequest;
            this.httpSession =httpRequest.getSession();
        }
    }