java 服务端分页 datatables 带查询条件java服务端分页处理实例

时间:2021-03-24 绝影A 人气:0

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使用datatables自带后台查询

前台代码：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="shortcut icon" type="image/ico"
  href="http://www.datatables.net/favicon.ico" rel="external nofollow" >
<meta name="viewport" content="initial-scale=1.0, maximum-scale=2.0">

<link rel="stylesheet" type="text/css"
  href="../../js/DataTables-1.10.8/media/css/jquery.dataTables.css" rel="external nofollow" >
<script type="text/javascript" language="javascript"
  src="../../js/DataTables-1.10.8/media/js/jquery.js"></script>
<script type="text/javascript" language="javascript"
  src="../../js/DataTables-1.10.8/media/js/jquery.dataTables.js"></script>
<script type="text/javascript" language="javascript" class="init">
  var table;
$(document).ready(function() {
  table = $('#example').DataTable( {
    "pagingType": "simple_numbers",//设置分页控件的模式
     searching: false,//屏蔽datatales的查询框
     aLengthMenu:[10],//设置一页展示10条记录
     "bLengthChange": false,//屏蔽tables的一页展示多少条记录的下拉列表
     "oLanguage": { //对表格国际化
      "sLengthMenu": "每页显示 _MENU_条", 
      "sZeroRecords": "没有找到符合条件的数据", 
    // "sProcessing": "<img src='./loading.gif' />", 
      "sInfo": "当前第 _START_ - _END_ 条　共计 _TOTAL_ 条", 
      "sInfoEmpty": "木有记录", 
      "sInfoFiltered": "(从 _MAX_ 条记录中过滤)", 
      "sSearch": "搜索：", 
      "oPaginate": { 
      "sFirst": "首页", 
      "sPrevious": "前一页", 
      "sNext": "后一页", 
      "sLast": "尾页" 

      } 
    },
  "processing": true, //打开数据加载时的等待效果
    "serverSide": true,//打开后台分页
    "ajax": {
      "url": "../../alarms/datatablesTest", 
      "dataSrc": "aaData", 
      "data": function ( d ) {
        var level1 = $('#level1').val();
        //添加额外的参数传给服务器
        d.extra_search = level1;
      }
    },
    "columns": [
      { "data": "total" },
      { "data": "level" }
    ]

  } );
} );


function search1()
{
  table.ajax.reload();
}

  </script>
</head>

<body class="dt-example">


  <div>
    <input type="text" id="level1"> 
    <input type="button" onclick="search1()" value="查询">
  </div>

  <table id="example" class="display" cellspacing="0" width="100%">
    <thead>
      <tr>
        <th>Name</th>
        <th>Position</th>
      </tr>
    </thead>
  </table>



</body>
</html>

Java代码如下，使用spring的 @ResponseBody将结果转换成json格式返回给前台

@RequestMapping(value="/datatablesTest", method=RequestMethod.GET)
  @ResponseBody
  public DatatablesViewPage<Alarm> datatablesTest(HttpServletRequest request){
//获取分页控件的信息
    String start = request.getParameter("start");
    System.out.println(start);
        String length = request.getParameter("length");
    System.out.println(length);
//获取前台额外传递过来的查询条件
    String extra_search = request.getParameter("extra_search");
    System.out.println(extra_search);
        //随便组织的查询结果
    List<Alarm> list = new ArrayList<Alarm>();
    Alarm alarm = new Alarm();
    alarm.setLevel(1);
    alarm.setTotal(100L);
    list.add(alarm);
    alarm = new Alarm();
    alarm.setLevel(2);
    alarm.setTotal(100L);
    list.add(alarm);


    DatatablesViewPage<Alarm> view = new DatatablesViewPage<Alarm>();
    view.setiTotalDisplayRecords(100);
    view.setiTotalRecords(100);

    view.setAaData(list);
    return view;
  }

DatatablesViewPage的声明如下：

public class DatatablesViewPage<T> {

  private List<T> aaData; //aaData 与datatales 加载的“dataSrc"对应
  private int iTotalDisplayRecords; 
  private int iTotalRecords;
  public DatatablesViewPage() {

  }
//get set方法 此处省略

}

在后台传输数据也可以用fastjson ；

@ResponseBody
  @RequestMapping("/datatable2")
  public JSON getTable2(String aoData){
    String sEcho = "";// 记录操作的次数 每次加1
    String iDisplayStart = "";// 起始
    String iDisplayLength = "";// size
    String sSearch = "";// 搜索的关键字
    int count = 1 ; //查询出来的数量
    JSONArray alldata = JSON.parseArray(aoData);
    for (int i = 0; i <alldata.size() ; i++) {
      JSONObject obj = (JSONObject) alldata.get(i);
      if (obj.get("name").equals("sEcho"))
        sEcho = obj.get("value").toString();
      if (obj.get("name").equals("iDisplayStart"))
        iDisplayStart = obj.get("value").toString();
      if (obj.get("name").equals("iDisplayLength"))
        iDisplayLength = obj.get("value").toString();
      if (obj.get("name").equals("sSearch"))
        sSearch = obj.get("value").toString();
    }
    DataTableModel u1 = new DataTableModel();
    u1.setFirst_name("Airi");
    u1.setLast_name("Satou");
    u1.setPosition("Accountant");
    u1.setOffice("Tokyo");
    u1.setStart_date("28th Nov 08");
    u1.setSalary("$162,700");

    Map<String,Object> listMap = new HashMap<String, Object>();
    List<DataTableModel> list = new ArrayList<DataTableModel>();
    list.add(u1);
    listMap.put("iTotalRecords",count);
    listMap.put("sEcho",Integer.parseInt(sEcho)+1);
    listMap.put("iTotalDisplayRecords",count);
    listMap.put("aaData",list);
    return (JSON)JSON.toJSON(listMap);
  }

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