Liferay Portlet上的AJAX [英] AJAX on liferay portlets

问题描述

我正在尝试将AJAX请求发送到Portlet，并且它可以正常工作.我向您展示我的代码，并在进行更好的解释之后:

I am trying to send an AJAX request to a portlet, and it half works. I show you my code and after explain better:

jQuery AJAX:

The jQuery AJAX:

jQuery("#operation").click(function() 
{
    var url         = '<portlet:resourceURL id="getDataResourceURL"></portlet:resourceURL>';
    var operators   = jQuery('#result').html();
    jQuery.ajax({
        url:url,
        dataType: "json",
        data:{operators:operators},
        success: function(data)
        {
            jQuery('#result').html(data.result);
        }
});

和serveResource

And the serveResource

@Override
public void serveResource(ResourceRequest resourceRequest, ResourceResponse resourceResponse) throws PortletException, IOException 
{
    String resourceId = resourceRequest.getResourceID();
    if (Validator.isNotNull(resourceId) && resourceId.length() != 0 && resourceId.equalsIgnoreCase("getDataResourceURL"))
    {
        //final String operators = resourceRequest.getParameter("operators");
        String operators = ParamUtil.getString(resourceRequest, "operators");

        _log.info("The data from AJAX are: " + operators);

        JSONObject jsonFeed = JSONFactoryUtil.createJSONObject();


        jsonFeed.put("result", 8);
        resourceResponse.setContentType("application/json");
        resourceResponse.setCharacterEncoding("UTF-8");
        resourceResponse.getWriter().write(jsonFeed.toString());
    }
}

好！！它正在工作的是响应，当我使用id操作按输入时，具有id结果的div会加载8(服务器响应写在jsonFeed.put("result"，8)上； 8仅用于测试)).它不起作用的是_log.info(来自AJAX的数据是:" +运算符)上的运算符String.它是一个空值(如果我使用resourceRequest.getParameter("operators");)或一个空字符串(如果我使用ParamUtil.getString(resourceRequest，"operators");).

OK!! What it is working is the response, when I press the input with the id operation the div with id result loads an 8 (that the server response writting on jsonFeed.put("result", 8); The 8 is only for a test). What it is not working is the operators String on _log.info("The data from AJAX are: " + operators); that it is a null (if I use resourceRequest.getParameter("operators");) or an empty string (if I use ParamUtil.getString(resourceRequest, "operators");).

我做错了什么?我该怎么做才能收到这个值?

What am I doing wrong? and what can I do to receive this value?

非常感谢您.

PS:在客户端，我也尝试这样做:

PS: On the client side, I tried too this:

jQuery.getJSON(url, {operators:operators}, function(data) 
{
    jQuery('#result').html(data.result);
});

_{PS:也发布在 Liferay论坛}

_{PS: Also posted in Liferay forums}

推荐答案

是否可以将 operators 更改为 operators1 ，使其看起来像 {operators1:operator}

Can you change operators to say operators1 so it would look like {operators1 : operators}

或

这可能是由于名称空间引起的，也许您可​​以尝试使用

it might be due to namespace, may be you can try having it like

data: {"<portlet:namespace />operators" : operators}

或

可以尝试在您的 serveResource 方法代码中获取httpRequest，例如:

may be try getting the httpRequest in your serveResource method code like:

HttpServletRequest request = PortalUtil.getHttpServletRequest(resourceRequest);
String operators = ParamUtil.getString(resourceRequest, "operators");

让我知道其中的任何一项

Let me know if any of this works

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