我有以下(缩短)struts2动作：
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;
}
}
当我做’cookieMap.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,所以我会认为它应该被调用 – 我错过了这里的东西？
谢谢
解决方法
看起来struts只支持读取cookie,你必须去servlet响应来实际设置一个cookie.
最后,我已经选择完全绕过struts2 cookie支持,直接转到servlet请求/响应对象进行阅读和写入：
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;
}
}
并且在struts.xml或web.xml中没有这个方法的配置,这是一个好处.所以我对这个解决方案感到满意,即使它在不好的光线下画了struts2.
