java - 在几秒钟内从 Spring MVC 中的表中获取 400K 数据

Question

我正在使用 Spring MVC，我需要通过我的表获取超过 400k 数据，其中我还在 mysql 查询中使用 JOIN。

我实际上拥有的是一个返回包含列表的 Controller 。我使用 AJAX 调用 Controller 。

我的解决方案的问题是我无法在几秒钟内获取 List 的数据，在 JSP 页面上加载需要超过 5 分钟。

在页面 Jquery..

$(document).ready(function ajaxPost() {
  $.ajax({
      type: "GET",
  data: page,
      url: "allListAjax",
      success: function(list) {
        //here i get responce list and page which takes 5 minutes
  }//success
 }//ajax
}//ready

在 Controller 中..

@RequestMapping(value="/allListAjax")
public @ResponseBody IVRRouteReportWrapper dashoardAjax(Model model, @RequestParam(required = false) Integer page) {
    IVRRouteReportWrapper wrappObj= new IVRRouteReportWrapper();
    List<IVRRouteReport> list = ivrRouteServiceInterface.getAllIVRRouteReport(page);
wrappObj.setIVRouteReportList(list);
    wrappObj.setPage(page);
return wrappObj;
}

这里，IVRRouteReportWrapper是一个Domain模型，其中包含List和页面的setter和getter。

服务实现中...

 public List<IVRRouteReport> getAllIVRRouteReport(Integer page) {
      return ivrRouteDAOInterface.getAllIVRRouteReport(page);
    }

在 Dao 实现中...

public List<IVRRouteReport> getAllIVRRouteReport(Integer page) {
if(page==null) {
    page = 0;
}else {
    page = page*200;
}
String strqry= "SELECT c.caller_id_number as caller_id_number, c.destination_number as destination_number,"
        +" c.created_time as created_time, vbDtmf.digit as dtmf FROM VoiceBroadcastDTMF vbDtmf "
        +"LEFT JOIN cdr c ON vbDtmf.uuid=c.orig_id ORDER BY c.created_time DESC";

Query query = getSession().createSQLQuery(strqry)
              .addScalar("caller_id_number", new StringType())
              .addScalar("destination_number", new StringType())
              .addScalar("created_time", new StringType())
              .addScalar("dtmf", new StringType())
              .setResultTransformer(Transformers.aliasToBean(IVRRouteReport.class))
              .setFirstResult(page)
              .setMaxResults(200);

 List<IVRRouteReport> ivrRouteReportList =(List<IVRRouteReport>) query.getResultList();
 getSession().flush();
 return ivrRouteReportList;
 }

Is there any way to return this List Fast on jsp page ? Thanks in advance.

Answer 1

为“created_time”列建立索引，并通过在查询中仅指定必填字段来省略非必填字段，如下所示

String strqry= "SELECT c.caller_id_number as caller_id_number, c.destination_number as destination_number,"
    +" c.created_time as created_time, vbDtmf.digit as dtmf FROM VoiceBroadcastDTMF vbDtmf "
    +"LEFT JOIN (SELECT caller_id_number , destination_number , created_time FROM cdr) as c ON vbDtmf.uuid=c.orig_id ORDER BY c.created_time DESC";