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datatables 带查询条件java服务端分页处理

2016-04-19 18:44 686 查看

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">
<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">
<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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