如何在 liferay portlet 中使用 ajax 响应对象 return？

Question

我需要 return 成功方法的字符串。这是我在 jsp 页面中的 AJAX 代码。

  <portlet:actionURL name="filterDocuments" var="filterDocuments">
    <portlet:param name="action" value="filterDocuments"/>
</portlet:actionURL>

<script type="application/javascript">
    var filterDto = {
        page: 0,
        tags: {},
        search: null
    };
    $.ajax({
        type: "POST",
        url: "<%=filterDocuments%>",
        data: filterDto,
        success: function (msg) {
            alert(msg);
        }
    });
</script>

这是我在后端的处理程序。

@ActionMapping(params = "action=filterDocuments")
    public void filterDocuments(ActionRequest actionRequest, ActionResponse actionResponse) throws IOException {
        PrintWriter writer = PortalUtil.getHttpServletResponse(actionResponse).getWriter();
        writer.write("text");
        writer.flush();
        writer.close();
    }

结果它在警报消息中显示了一个空字符串。如何处理？

更新我将控制器方法更改为

 @ResourceMapping(value = "filterDocuments")
public void filterDocuments(ActionRequest actionRequest, ActionResponse actionResponse) throws IOException {
    PrintWriter writer = PortalUtil.getHttpServletResponse(actionResponse).getWriter();
    writer.write("text");
    writer.flush();
    writer.close();
}

我的 jsp url 是

    <portlet:resourceURL var="ajaxResourceURL"/>

<script type="application/javascript">
    var filterDto = {
        page: 0,
        tags: {},
        search: null
    };
    $.ajax({
        type: "POST",
        url: "<%=ajaxResourceURL%>",
        data: filterDto,
        success: function (msg) {
            alert(msg);
        }
    });
</script>

现在它给了我一个例外

org.springframework.web.portlet.NoHandlerFoundException: No handler found for portlet request: mode 'view', phase 'RESOURCE_PHASE', parameters map['search' -> array[''], 'page' -> array['0']]

完全控制者class

  @Controller
@RequestMapping("VIEW")
@Log4j
public class SpringMVCController extends MVCPortlet {




    @RenderMapping
    public String view(RenderRequest request, RenderResponse response) {


        String view = PropertiesConfig.getAsString("views", request);

        return view;
    }


    @Override
    public void serveResource(ResourceRequest resourceRequest,
                              ResourceResponse resourceResponse)
            throws IOException, PortletException {
        try {
            PrintWriter writer = resourceResponse.getWriter();
            writer.write("text");
            writer.flush();
            writer.close();
            CaptchaUtil.serveImage(resourceRequest, resourceResponse);
        } catch (Exception e) {
            log.error(e.getMessage());
        }
    }


    @ResourceMapping(value = "action=filterDocuments")
    public void filterDocuments(ActionRequest actionRequest, ActionResponse actionResponse) throws IOException {
        PrintWriter writer = PortalUtil.getHttpServletResponse(actionResponse).getWriter();
        writer.write("text");
        writer.flush();
        writer.close();
    }


}

Answer 1

以下 is/are 您更新后的代码存在的问题：

我。您没有根据您的 portlet:actionURL 在 portlet:resourceURL 上指定 id 属性（具有必需的值）。将其更改为：

<portlet:resourceURL id="filterDocuments" var="filterDocuments" />

二。 class 中映射方法的签名与 UI 上 portlet:resourceURL 的 id 属性值不同，将其更改为：

@ResourceMapping("filterDocuments")
public void filterDocuments(ResourceRequest request, ResourceResponse response)
throws IOException, SystemException {
    PrintWriter writer = response.getWriter();
    writer.write("text");
    writer.flush();
    writer.close();
}

三。从操作 class 中删除其他 serveResource 方法，因为它仅适用于通用（默认）portlet 类型。

参考： Liferay Spring Portlet Tutorial

如何在 liferay portlet 中使用 ajax 响应对象 return？

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