struts2框架在动作类中访问servlet的api

 第一种方式：使用ServletActionContext类 （常用）

public class UserAction1 {

public String findUser() {

HttpServletRequest request = ServletActionContext.getRequest();

HttpServletResponse response = ServletActionContext.getResponse();

HttpSession session= request.getSession();

ServletContext application = ServletActionContext.getServletContext();

session.setAttribute("name", "孙悟空");

System.out.println(request+"\n"+response+"\n"+session+"\n"+application);

return "success";

}

 第二种方式：使用实现接口的方式

public class UserAction2 implements ServletRequestAware,ServletResponseAware,ServletContextAware{

private HttpServletResponse response;

private HttpServletRequest request;

private ServletContext application;

private HttpSession session;

@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;

}

public String findUser() {

session=request.getSession();

request.setAttribute("name", "如花似玉的姐");

System.out.println(request+"\n"+response+"\n"+session+"\n"+application);

return "success";

}

}

  第三种方式：

ActionContext

public class UserAction3 {

public String findUser() {

ActionContext context = ActionContext.getContext();

Map<String, Object> session = context.getSession();

Map<String, Object> application=context.getApplication();

HttpServletRequest request= (HttpServletRequest) context.get(StrutsStatics.HTTP_REQUEST);

HttpServletResponse response = (HttpServletResponse) context.get(StrutsStatics.HTTP_RESPONSE);

request.setAttribute("name", "如花似玉的姐");

System.out.println(request+"\n"+response+"\n"+session+"\n"+application);

return "success";

}