struts2 中怎样获取HttpServletReqest

struts2 中怎样获取HttpServletRequest 和HttpServletResponse

提供两种方法

第一种通过调用ServletActionContext这个类源代码中提供这个对象。

*/
public static void setRequest(HttpServletRequest request) {
ActionContext.getContext().put(HTTP_REQUEST, request);
}

/**
* Gets the HTTP servlet request object.
*
* @return the HTTP servlet request object.
*/
public static HttpServletRequest getRequest() {
return (HttpServletRequest) ActionContext.getContext().get(HTTP_REQUEST);
}

/**
* Sets the HTTP servlet response object.
*
* @param response the HTTP servlet response object.
*/
public static void setResponse(HttpServletResponse response) {
ActionContext.getContext().put(HTTP_RESPONSE, response);
}

/**
* Gets the HTTP servlet response object.
*
* @return the HTTP servlet response object.
*/
public static HttpServletResponse getResponse() {
return (HttpServletResponse) ActionContext.getContext().get(HTTP_RESPONSE);
}

/**
* Gets the servlet context.
*
* @return the servlet context.
*/
public static ServletContext getServletContext() {
return (ServletContext) ActionContext.getContext().get(SERVLET_CONTEXT);
}

调用方法

ServletActionContext.getPageContext();

ServletActionContext.getRequest();
ServletActionContext.getResponse();
ServletActionContext.getContext();

第二种方法：通过实现ServletRequestAware接口 来实现

代码如

public class Demo2Action extends ActionSupport implements ServletRequestAware{
private HttpServletRequest request;

public String execute(){
System.out.print(request);
return NONE;

}

//调用动作方法前  框架先会调用此方法 将request对象注入进来
public void setServletRequest(HttpServletRequest request) {

this.request=request;
}

}

这样也能够实现得到HttpServletRequest