获取HttpServletRequest / HttpSession / ServletContext / HttpServletResponse对象

 

方法一，通过 ServletActionContext. 类直接获取：

public String rsa() throws Exception{

HttpServletRequest request = ServletActionContext .getRequest();

ServletContext servletContext = ServletActionContext.getServletContext();

request.getSession()

HttpServletResponse response = ServletActionContext.getResponse();

return "scope";

}

方法二，实现指定接口，由 struts 框架运行时注入：

public class HelloWorldAction implements ServletRequestAware, ServletResponseAware, ServletContextAware{

private HttpServletRequest request;

private ServletContext servletContext;

private HttpServletResponse response;

public void setServletRequest(HttpServletRequest req) {

this.request=req;

}

public void setServletResponse(HttpServletResponse res) {

this.response=res;

}

public void setServletContext(ServletContext ser) {

this.servletContext=ser;

}

}