Question

Liferay 6.1.0中有一个portlet，其中jsp被重定向到另一个带有URL参数的jsp。

http://localhost:8081/web/guest/debitpayment?fishId=1467

我希望使用下面的代码获取fishId的值，但它为null：

@Override
protected Object formBackingObject(PortletRequest request) throws Exception {
    HttpServletRequest httpServletRequest = PortalUtil.getOriginalServletRequest(PortalUtil.getHttpServletRequest(request));
    String fishId = httpServletRequest.getParameter("fishId");
    //fishId is null
    return super.formBackingObject(request);
}

最后，我尝试使用此代码从queryString获取值，然后返回值。但我想知道为什么从httpServletRequest获取它是空的。

@Override
protected Object formBackingObject(PortletRequest request) throws Exception {
    String fishId = getParameter(request,"fishId");
    //fishId is now 1476
    return super.formBackingObject(request);
}

public static String getParameter(PortletRequest portletRequest, String paramName) {
    HttpServletRequest httpRequest = PortalUtil.getHttpServletRequest(portletRequest);
    HttpServletRequest httpServletRequest = PortalUtil.getOriginalServletRequest(httpRequest);
    String retval = portletRequest.getParameter(paramName);
    if (isNull(retval)) {
        retval = httpRequest.getParameter(paramName);
        if (isNull(retval)) {
            retval = httpServletRequest.getParameter(paramName);
            if (isNull(retval)) {
                retval = getParameterFromQueryString(httpServletRequest.getQueryString(), paramName);
                if (isNull(retval)) {
                    HttpServletRequest request = httpServletRequest;
                    try {
                        while (request != null) {
                            Method m = httpServletRequest.getClass().getMethod("getRequest", null);
                            request = (HttpServletRequest) m.invoke(request, null);
                            retval = request.getParameter(paramName);
                            if (Utility.isNotNull(retval))
                                break;
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }
        }
    }
    return retval;
}

private static String getParameterFromQueryString(String queryString, String paramName) {
    String[] paramValues = queryString.split("&");
    for (String paramValue : paramValues) {
        String[] param = paramValue.split("=");
        if (param.length == 2 && param[0].equalsIgnoreCase("currentURL")) {
            String url = param[1];
            String[] url_splittedWithQuestionMark = url.split("%3F");// ?
                                                                        // mark
            if (url_splittedWithQuestionMark.length == 2) {
                String url_params = url_splittedWithQuestionMark[1];
                String[] url_paramValues = url_params.split("%26");// & mark
                for (String url_paramValue : url_paramValues) {
                    String[] one_paramValue = url_paramValue.split("%3D");
                    // =
                    // mark
                    if (one_paramValue.length == 2 && one_paramValue[0].equals(paramName))
                        return one_paramValue[1];
                }
            }
        }
    }
    return null;
}

Answer 1

我发现问题的原因和答案。我在liferay-portlet.xml中为此portlet使用了 render-weight 配置来更改其在页面中加载的优先级。当我删除此配置时，一切正常。

URL中的参数值为null

1 个答案: