结果跳转方式
1、转发
<!-- 转发 --> <action name="Demo1Action" class="cn.itheima.a_result.Demo1Action" method="execute" > <result name="success" type="dispatcher" >/hello.jsp</result> </action>
2、重定向
<!-- 重定向 --> <action name="Demo2Action" class="cn.itheima.a_result.Demo2Action" method="execute" > <result name="success" type="redirect" >/hello.jsp</result> </action>
3、转发到Action
<!-- 转发到Action --> <action name="Demo3Action" class="cn.itheima.a_result.Demo3Action" method="execute" > <result name="success" type="chain"> <!-- action的名字 --> <param name="actionName">Demo1Action</param> <!-- action所在的命名空间 --> <param name="namespace">/</param> </result> </action>
4、重定向到Action
<!-- 重定向到Action --> <action name="Demo4Action" class="cn.itheima.a_result.Demo4Action" method="execute" > <result name="success" type="redirectAction"> <!-- action的名字 --> <param name="actionName">Demo1Action</param> <!-- action所在的命名空间 --> <param name="namespace">/</param> </result> </action>
访问servletAPI方式
1、原理
2、通过ActionContext
public class Demo5Action extends ActionSupport { public String execute() throws Exception { //request域=> map (struts2并不推荐使用原生request域) //不推荐 Map<String, Object> requestScope = (Map<String, Object>) ActionContext.getContext().get("request"); //推荐 ActionContext.getContext().put("name", "requestTom"); //session域 => map Map<String, Object> sessionScope = ActionContext.getContext().getSession(); sessionScope.put("name", "sessionTom"); //application域=>map Map<String, Object> applicationScope = ActionContext.getContext().getApplication(); applicationScope.put("name", "applicationTom"); return SUCCESS; } }
3、通过ServletActionContext
public class Demo6Action extends ActionSupport { //并不推荐 public String execute() throws Exception { //原生request HttpServletRequest request = ServletActionContext.getRequest(); //原生session HttpSession session = request.getSession(); //原生response HttpServletResponse response = ServletActionContext.getResponse(); //原生servletContext ServletContext servletContext = ServletActionContext.getServletContext(); return SUCCESS; } }
4、通过实现接口方式
public class Demo7Action extends ActionSupport implements ServletRequestAware { private HttpServletRequest request; public String execute() throws Exception { System.out.println("原生request:"+request); return SUCCESS; } @Override public void setServletRequest(HttpServletRequest request) { this.request = request; } }