Question

ServletActionContext.getRequest().getRealPath("/upload");报ServletActionContext cannot be resolved

我搭的ssh框架他继承的是action不是actionsupport

Answer 1

你需要先获取到这个上下文变量

Struts2获取web资源的几种方式

1、通过ActionContext直接获取

1 public testAction extends ActionSupport {
2 private Map request;
3 private Map session;
4 private Map application;
5 public testAction(){
6 request = (Map)ActionContext.getContext().get("request");
7 　　　　　session = ActionContext.getContext().getSession();
8 　　　　　application = ActionContext.getContext().getApplication();
9 }
10 }

2 通过实现XXXXAware接口

1 public class testAction extends ActionSupport implements RequestAware, SessionAware, ApplicationAware, ParameterAware {
2 private Map<String, Object> request;
3 private Map<String, Object> session;
4 private Map<String, Object> application;
5 public void setApplication(Map<String, Object> application) {
6 // TODO Auto-generated method stub
7 this.application = application;
8 }
9 public void setSession(Map<String, Object> session) {//实现接口中的方法
10 // TODO Auto-generated method stub
11 this.session = session;
12 }
13 public void setRequest(Map<String, Object> request) {//实现接口中的方法
14 // TODO Auto-generated method stub
15 this.request = request;
16 }
17 public void setParameters(Map<String, String[]> parameters) {//实现接口中的方法
18 // TODO Auto-generated method stub
19 this.parameters = parameters;
20 }
21 }
22

3、获取Servlet中原生的web元素

1 public class testAction extends ActionSupport {
2 private HttpServletRequest request;
3 private HttpSession session;
4 private ServletContext application;
5
6 public testAction(){
7 /**
8 * ServletActionContext对象获取原生web元素
9 * HttpServletRequest等
10 */
11 request = ServletActionContext.getRequest();
12 session = request.getSession();
13 application = ServletActionContext.getServletContext();
14 }
15 }

4、实现ServletXXXAware接口获取原生Servlet中的Web元素

1 /**
2 * 实现ServletXXXAware 接口
3 * 可以获取到原生的Servlet API中的
4 * request
5 * response servletcontext对象
6 * @author ThinkPad
7 *
8 */
9 public class loginAction4
10 implements ServletRequestAware, ServletContextAware, ServletResponseAware {
11 public String execute(){
12 return "success";
13 }
14 @Override
15 public void setServletResponse(HttpServletResponse response) {
16 // TODO Auto-generated method stub
17 System.out.println(response);
18 }
19
20 @Override
21 public void setServletContext(ServletContext context) {
22 // TODO Auto-generated method stub
23 System.out.println(context);
24 }
25
26 @Override
27 public void setServletRequest(HttpServletRequest request) {
28 // TODO Auto-generated method stub
29 System.out.println(request);
30 }
31
32
33
34 }

追问

这位大哥 我是继承的action 没有继承actionsupport 这个是网上学搭的框架 继承actionsupport的话form表单中的action跳转就会一个？传值 怎么回事啊