在Struts 2和Struts中使用cookie
问题内容:
我有以下(缩短的)struts2操作:
public class MyAction extends BaseAction implements CookiesAware {
public String execute() {
if (cookiesMap.containsKey("BLAH"))
blah=Integer.parseInt(cookiesMap.get("BLAH"));
return "success";
}
// For handling cookies
Map<String, String> cookiesMap;
@Override
public void setCookiesMap(Map<String, String> cookiesMap) {
this.cookiesMap = cookiesMap;
}
}
当我执行’cookiesMap.containsKey’时,我得到一个空指针异常-
在我看来setCookiesMap没有被调用。我已经实现了CookiesAware接口,所以我以为 应该 调用它-我在这里错过了什么吗?
谢谢
问题答案:
看起来struts仅支持读取cookie,您必须转到servlet响应以实际 设置 cookie。
最后,我选择完全绕过struts2 cookie支持,直接进入servlet请求/响应对象进行读写:
public class MyAction extends ActionSupport implements ServletResponseAware, ServletRequestAware {
public int division;
public String execute() {
// Load from cookie
for(Cookie c : servletRequest.getCookies()) {
if (c.getName().equals("cookieDivision"))
division=Integer.parseInt(c.getValue());
}
// Save to cookie
Cookie div = new Cookie("cookieDivision", String.format("%d",division));
div.setMaxAge(60*60*24*365); // Make the cookie last a year
servletResponse.addCookie(div);
return "success";
}
// For access to the raw servlet request / response, eg for cookies
protected HttpServletResponse servletResponse;
@Override
public void setServletResponse(HttpServletResponse servletResponse) {
this.servletResponse = servletResponse;
}
protected HttpServletRequest servletRequest;
@Override
public void setServletRequest(HttpServletRequest servletRequest) {
this.servletRequest = servletRequest;
}
}
而且在struts.xml或web.xml中都不需要为此方法进行配置,这是一个好处。因此,即使该解决方案确实在光线不佳的情况下喷涂了struts2,我也对它感到满意。