Struts2访问request，session，application的四种方式

 方式1--》访问Map类型的： package cn.pdsu.edu; import java.util.Map; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; /** * 普通方式：Map类型的request,session,application */ public class ActionDemo1 extends ActionSupport { private Map<String,Object> request; private Map<String,Object> session; private Map<String,Object> application; public ActionDemo1() { this.request = (Map)ActionContext.getContext().get("request"); this.session = ActionContext.getContext().getSession(); this.application = ActionContext.getContext().getApplication(); } @Override public String execute() throws Exception { request.put("message", "message"); session.put("message", "message"); application.put("message", "message"); return SUCCESS; } }

方式2--》访问map类型的：

package cn.pdsu.edu; import java.util.Map; import org.apache.struts2.interceptor.ApplicationAware; import org.apache.struts2.interceptor.RequestAware; import org.apache.struts2.interceptor.SessionAware; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; /** *接口方式：Map类型的request,session,application */ public class ActionDemo2 extends ActionSupport implements RequestAware,SessionAware,ApplicationAware{ private Map<String,Object> request; private Map<String,Object> session; private Map<String,Object> application; @Override public String execute() throws Exception { request.put("message", "message"); session.put("message", "message"); application.put("message", "message"); return SUCCESS; } public void setRequest(Map<String, Object> request) { this.request=request; } public void setSession(Map<String, Object> session) { this.session=session; } public void setApplication(Map<String, Object> application) { this.application = application; } }

方式3--》访问HttpServletRequest

package cn.pdsu.edu; import java.util.Map; import javax.servlet.ServletContext; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import org.apache.struts2.ServletActionContext; import org.apache.struts2.interceptor.ApplicationAware; import org.apache.struts2.interceptor.RequestAware; import org.apache.struts2.interceptor.SessionAware; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; /** * 普通方式：Servlet类型的request,session,application */ public class ActionDemo3 extends ActionSupport { private HttpServletRequest request; private HttpSession session; private ServletContext application; public ActionDemo3() { request = ServletActionContext.getRequest(); session = request.getSession(); application = session.getServletContext(); } @Override public String execute() throws Exception { request.setAttribute("message", "message"); session.setAttribute("message", "message"); application.setAttribute("message", "message"); return SUCCESS; } }

方式4--》通过接口访问HttpServletRequest

package cn.pdsu.edu; import java.util.Map; import javax.management.j2ee.statistics.ServletStats; import javax.servlet.ServletContext; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import org.apache.struts2.ServletActionContext; import org.apache.struts2.interceptor.ApplicationAware; import org.apache.struts2.interceptor.RequestAware; import org.apache.struts2.interceptor.ServletRequestAware; import org.apache.struts2.interceptor.SessionAware; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; /** * 接口方式：Servlet类型的request,session,application */ public class ActionDemo4 extends ActionSupport implements ServletRequestAware{ private HttpServletRequest request; private HttpSession session; private ServletContext application; @Override public String execute() throws Exception { request.setAttribute("message", "message"); session.setAttribute("message", "message"); application.setAttribute("message", "message"); return SUCCESS; } public void setServletRequest(HttpServletRequest request) { this.request = request; this.session = request.getSession(); this.application = session.getServletContext(); } }