Liferay Ajax请求和JSON响应 [英] Liferay ajax request and JSON response

问题描述

我是Liferay的新手.我使用服务生成器来创建数据库.我手动填充了它们.最终，我可以使用PersonLocalServiceUtil class在JSP中调用它们. 现在，我想在程序中使用Ajax.

I am new in Liferay. I used service builder to create database. I populated them manually. And eventually I could call them in JSP using PersonLocalServiceUtil class. Now I want to use Ajax in my program.

例如: 具有属性personID，personWeight，personTemperature和datetime的人员存储在数据库中.

For example: Person with attributes personID, personWeight, personTemperature and datetime are stored in database.

我想通过personID进行ajax调用，以查看其特定时间轴的 weight 或 Temperature 图.我所知道的，我可以将列表从数据库调用到控制器，但是我不知道如何将其转换为JSON对象，并根据请求将其转发到JSP，这样JSP不会刷新页面而是显示新图形.

I want to do an ajax call by personID to see his weight or Temperature graph for particular timeline. All I know, I can call list from Database to controller But I don't know How can I convert it to JSON obejct and forward it to JSP upon request, so that JSP won't refresh the page but display new graph.

推荐答案

您可以使用ajax请求从jsp发送人员ID，也可以在 controller(serveResource方法)内部获取数据 即

You can send person id from jsp using ajax request and you can fetch data inside controller(serveResource method) i.e

您需要创建URL

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

Ajax呼叫

$.ajax({
  url : '${resourceURL}',
  data : data,//person id to sent
  type: 'POST',
  dataType : "json",
  success : function(data) {
    // get person data back from controller
  }
});

控制器部分

public void serveResource(ResourceRequest resourceRequest, ResourceResponse resourceResponse) {

    //get person id using getparameter 

    JSONObject json = JSONFactoryUtil.createJSONObject();

    json.put("jsonData", "person details");
    response.getWriter().write(json.toString());

}

HTH

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