action访问servlet的API并且获取到MAP类型的application，session，request
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public class testAction3 extends ActionSupport { private Map<String,Object> request; private Map<String,Object> session; private Map<String,Object> application; /** * 构造函数，没有返回值 */ public testAction3(){ this.request=(Map) ActionContext.getContext().get("request"); this.session=ActionContext.getContext().getSession(); this.application=ActionContext.getContext().getApplication(); } @Override public String execute(){ System.out.println("开始。。。。"); this.request.put("reqAttr","reqDirect"); this.session.put("sessionAttr", "sessionDirect"); this.application.put("appAttr", "appDirect"); return SUCCESS; } }
<body> request:${reqAttr}<br> session:${sessionAttr}<br> application:${appAttr}<br> ------------------------------<br> request:${requestScope.reqAttr}<br> session:${sessionScope.sessionAttr}<br> application:${applicationScope.appAttr}<br> </body>
或者使用IoC方法：需要实现相应的接口
public class testAction3 extends ActionSupport implements RequestAware,SessionAware,ApplicationAware{ private Map<String,Object> request; private Map<String,Object> session; private Map<String,Object> application; @Override public void setApplication(Map<String, Object> application) { // TODO Auto-generated method stub this.application=application; } @Override public void setSession(Map<String, Object> session) { // TODO Auto-generated method stub this.session=session; } @Override public void setRequest(Map<String, Object> request) { // TODO Auto-generated method stub this.request=request; } @Override public String execute(){ System.out.println("开始。。。。"); this.request.put("reqAttr","reqDirect"); this.session.put("sessionAttr", "sessionDirect"); this.application.put("appAttr", "appDirect"); return SUCCESS; } }
二、获取http类型
public class testAction3 extends ActionSupport{ private HttpServletRequest request; private HttpServletResponse response; private HttpSession session; private ServletContext application; /** * 获取 */ public testAction3(){ this.request=ServletActionContext.getRequest(); this.response=ServletActionContext.getResponse(); this.session=this.request.getSession(); this.application=ServletActionContext.getServletContext(); } @Override public String execute() throws Exception{ System.out.println("开始。。。。"); this.request.setAttribute("reqAttr", "reqDirect"); this.application.setAttribute("appAttr", "applicationDirect"); this.session.setAttribute("sessionAttr", "sessionDirect"); // Ajax使用的时候可以用 // PrintWriter out=response.getWriter(); // out.print("response"); // out.flush(); // out.close(); // return null; return SUCCESS; } }
或者用依赖注入方式：
public class testAction3 extends ActionSupport implements ServletRequestAware,ServletResponseAware,ServletContextAware{ private HttpServletRequest request; private HttpServletResponse response; private HttpSession session; private ServletContext application; /** * 获取 */ @Override public void setServletContext(ServletContext application) { // TODO Auto-generated method stub this.application=application; } @Override public void setServletResponse(HttpServletResponse response) { // TODO Auto-generated method stub this.response=response; } @Override public void setServletRequest(HttpServletRequest request) { // TODO Auto-generated method stub this.request=request; } @Override public String execute() throws Exception{ this.session=this.request.getSession();//session是通过request获取，所以没有关于实现session的接口 System.out.println("开始。。。。"); this.request.setAttribute("reqAttr", "reqDirect"); this.application.setAttribute("appAttr", "applicationDirect"); this.session.setAttribute("sessionAttr", "sessionDirect"); return SUCCESS; } }
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