springMVC+velocity实现仿Datatables局部刷新分页方法

因为项目中之前的模块用的分页插件是Datatables,很方便,但是新做的模块表格中的布局有变化,Datatables插件满足不了了。为了风格的统一,同时也不希望查询参数再传递回显在页面上,所以就采用局部刷新分页的实现方案。

实现方案是这样的,将表格部分提取出来,用来作为页面局部刷新的部分,文件名为list-data.vm

<table class="table text-center table_acolor"> 
 <thead> 
 <tr> 
  <th width="16%">userName</th> 
  <th width="24%">age</th> 
 </tr> 
 </thead> 
 <tbody> 
 #foreach($data in $!{page.list}) 
 <tr> 
  <td width="16%">$!{data.userName}</td> 
  <td width="24%">$!{data.sex}</td> 
 </tr> 
 #end 
 </tbody> 
</table> 
#pageNation($!{page}) 

其中的pageNation是定义的一个宏(macro),用来做底部的分页条和分页条的显示逻辑。page对象是ajax请求返回的分页数据。每一次ajax请求,查询出分页数据,将数据放入list-data.vm所对应的视图的ModelAndView对象,然后返回ModelAndView对象,将这一部分追加到主页面表格所在的部分。

macro部分如下:

#macro(pageNation $data) 
 #if(!$data.list.size() or $data.list.size() == 0) 
<div class="row DTTTFooter no-padding" style="height:40px; line-height:40px; text-align:center; font-size:14px;"> 
未查询到记录 
</div> 
 #end 
 #if($data.list.size() and $data.list.size() > 0) 
  <div id="activityTable_info" class="dataTables_info" role="status" aria-live="polite">显示第 $!{data.startRow} 至 $!{data.endRow} 项结果,共 $!{data.total}项</div> 
  <div id="pagination" class="dataTables_paginate paging_full_numbers"> 
  #set($prevPage = ${data.prePage}) 
  #set($nextnPage = ${data.nextPage}) 
  <a #if($data.pageNum ==1) class="paginate_button disabled" disabled="disabled" href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" 
  #else class="paginate_button" pageNum="1" href="javascript:goPage(1)" rel="external nofollow" 
  #end style="margin-left: 2px;" 
  >首页</a> 
  <a #if($data.pageNum ==1) class="paginate_button disabled" disabled="disabled" href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" 
  #else class="paginate_button" pageNum="$prevPage" href="javascript:goPage($prevPage)" rel="external nofollow" 
  #end style="margin-left: 2px;" 
  > 上页 </a> 
  #set($temp = ${data.pageNum} - 1) 
  #set($numbers = $!{pageUtil.numbers($temp, $data.pages)}) 
  
  #foreach($foo in $numbers) 
  #if($foo == -999) 
  <span>…</span> 
  #else 
  <a class="paginate_button #if($foo==${data.pageNum}) current #end" pageNum="$foo" #if($foo!=${data.pageNum}) href="javascript:goPage($foo)" rel="external nofollow" #end style="margin-left: 2px;" 
  > $foo </a> 
  #end 
  #end 
  
  <a 
  #if($data.pageNum == $data.pages) class="paginate_button disabled" disabled="disabled" 
  #else class="paginate_button" pageNum="$nextnPage" href="javascript:goPage($nextnPage)" rel="external nofollow" 
  #end style="margin-left: 2px;" 
  > 下页 
  <a 
  #if($data.pageNum == $data.pages) 
   class="paginate_button disabled" disabled="disabled" href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" 
  #else 
   class="paginate_button" pageNum="$data.pages" href="javascript:goPage($data.pages)" rel="external nofollow" 
  #end 
  >末页</a> 
  到第 
 <input id="changePage" class="margin text-center" type="text" maxpage="10" style="height:28px;line-height:28px;width:40px;"> 
 页 
 <a id="dataTable-btn" class="btn btn-default shiny" href="javascript:jumpPage($data.pages);" rel="external nofollow" style="margin-bottom:5px">确认</a> 
 #end 
 </div> 
 <div p_sortinfo="$!{data.orderBy}" p_isFirst=$!{data.isFirst} p_isLast=$!{data.isLast} p_currentpagenum="$!{data.pageNum}" p_totalsize="$!{data.total}" p_endrow="$!{data.endRow}" p_totalpagesnum="$!{data.pages}" p_pagesize="$!{data.pageSize}" p_startrow="$!{data.startRow}" style="display:none" class="paginator"></div> 
#end 

pageUtil是写的velocity toolbox的一个工具类,用来仿Datatables分页条的分页页码显示的逻辑:

public class PageUtil { 
 
 public static LinkedList<Integer> range(Integer len,Integer start) { 
 LinkedList<Integer> out = new LinkedList<>(); 
 Integer end; 
 
 if (start == null ) { 
  start = 0; 
  end = len; 
 } 
  
 else { 
  end = start; 
  start = len; 
 } 
 
 for (int i=start ; i<end ; i++ ) { 
  out.add(i); 
 } 
 
 return out; 
 } 
 
 public static List<Integer> numbers (Integer page,Integer pages) { 
 LinkedList<Integer> numbers = new LinkedList<>(); 
 Integer buttons = 7; 
 Integer half = buttons / 2; 
 
 if (pages <= buttons ) { 
  numbers = range( 0, pages ); 
 } 
 else if ( page <= half ) { 
  numbers = range( 0, buttons-2 ); 
  numbers.add(-1000); 
  numbers.add( pages-1 ); 
 } 
 else if ( page >= pages - 1 - half ) { 
  numbers = range( pages-(buttons-2), pages ); 
  numbers.addFirst(-1000 ); //向头放 
  numbers.addFirst(0 ); 
 } 
 else { 
  numbers = range( page-1, page+2 ); 
  numbers.add( -1000 ); 
  numbers.add( pages-1 ); 
  numbers.addFirst(-1000 ); 
  numbers.addFirst(0 ); 
 } 
 List<Integer> res = new ArrayList<>(); 
 for (Integer integer : numbers) { 
  res.add(integer+1); 
 } 
 return res; 
 } 
} 

而这段逻辑是从Datatables的js源码中找到的,我将其转化为java代码。Datatables源码的该部分代码如下

function _numbers ( page, pages ) { 
 var 
  numbers = [], 
  buttons = extPagination.numbers_length, 
  half = Math.floor( buttons / 2 ), 
  i = 1; 
 
 if ( pages <= buttons ) { 
  numbers = _range( 0, pages ); 
 } 
 else if ( page <= half ) { 
  numbers = _range( 0, buttons-2 ); 
  numbers.push( 'ellipsis' ); 
  numbers.push( pages-1 ); 
 } 
 else if ( page >= pages - 1 - half ) { 
  numbers = _range( pages-(buttons-2), pages ); 
  numbers.splice( 0, 0, 'ellipsis' ); // no unshift in ie6 
  numbers.splice( 0, 0, 0 ); 
 } 
 else { 
  numbers = _range( page-1, page+2 ); 
  numbers.push( 'ellipsis' ); 
  numbers.push( pages-1 ); 
  numbers.splice( 0, 0, 'ellipsis' ); 
  numbers.splice( 0, 0, 0 ); 
 } 
 
 numbers.DT_el = 'span'; 
 return numbers; 
 } 
var _range = function ( len, start ) 
 { 
 var out = []; 
 var end; 
 
 if ( start === undefined ) { 
  start = 0; 
  end = len; 
 } 
 else { 
  end = start; 
  start = len; 
 } 
 
 for ( var i=start ; i<end ; i++ ) { 
  out.push( i ); 
 } 
 
 return out; 
 }; 

我将页面的ajax请求分页的数据做了封装:

/** 
 * 
 */ 
//macro分页跳页调用方法,调用的页面需要提供goPage(redirectpage)方法 
function jumpPage(totalPage) { 
 var redirectpage = $("#changePage").val(); 
 if(redirectpage == ""){ 
 $("#changePage").focus(); 
 }else{ 
 var rex = /^\d+$/; 
 if(!rex.test(redirectpage)){ 
  alert("页码输入有误,只能输入不大于总页数的正整数"); 
 }else{ 
  var pageNo = parseInt(redirectpage); 
  if(pageNo <= 0 || pageNo > totalPage){ 
  alert("页码输入有误,只能输入不大于总页数的正整数"); 
  }else{ 
  goPage(redirectpage) 
  } 
 } 
 } 
} 
 
$.fn.pagenation = function(options) { 
 
 //默认参数 
 var defaults={ 
  url:"", 
  data:{},//参数 
  pageNo:1,//页码 
  pageSize:10,//页面大小 
  pageSuccess:{}//分页数据成功返回的回调函数 
 } 
 var _self = $(this); 
 options = $.extend(defaults,options); 
 var ajaxData = { 
 "pageNo":options.pageNo, 
 "pageSize":options.pageSize 
 }; 
 
 
 this.fnDraw = function(pageNo) { 
 if (typeof (options.data) == 'function') { 
  ajaxData = options.data(ajaxData); 
 } else { 
  ajaxData = $.extend(ajaxData,options.data); 
 } 
 if (pageNo != undefined) { 
  ajaxData['pageNo'] = pageNo; 
 } 
  
 $.ajax({ 
  url: options.url, 
  async: false, 
  type:"post", 
  data: ajaxData, 
  success: function(result,code,dd) { 
  _self.html(result); 
  if (typeof options.pageSuccess == 'function') { 
   options.pageSuccess(); 
  } 
  }, 
  error:function(){ 
  alert("操作失败"); 
  } 
 }); 
 }; 
 
 this.init = function() { 
 this.fnDraw(1); 
 return this; 
 } 
 
 return this; 
 
} 

在主页面调用:

<!DOCTYPE html> 
<html> 
<head> 
<meta charset="UTF-8"> 
<title>Insert title here</title> 
#set($ctx = ${request.getContextPath()}) 
<link rel="stylesheet" type="text/css" href="$ctx/assets/js/dataTables/jquery.dataTables.min.css" rel="external nofollow" /> 
 <link rel="stylesheet" type="text/css" href="$ctx/assets/js/dataTables/css/jquery.dataTables_theme.css" rel="external nofollow" /> 
 <script type="text/javascript" src="$ctx/assets/js/jquery-1.11.2.min.js"></script> 
 <script type="text/javascript" src="$ctx/assets/js/macro.pagination.js"></script> 
</head> 
<body> 
 <div class="dataTables_wrapper" id="pageDiv"> 
  
 </div> 
 <script type="text/javascript"> 
 var pagenation = $("#pageDiv").pagenation({ 
 url:"${ctx}/listData.do", 
 pageSize:20, 
 data:function (data) { 
  $("#searchForm [name]").each(function(i, n){ 
  data[$(n).attr('name')] = n.value; 
  }); 
  return data; 
 }, 
 pageSuccess:function(){ 
  
 } 
 }).init(); 
 
 function goPage(pageNo) { 
 pagenation.fnDraw(pageNo); 
 } 
 </script> 
</body> 
</html> 

其中pageSuccess参数是用来在ajax返回数据成功后,需要做的一些操作。

这里说的也不太明白,附上码云的git地址:http://git.oschina.net/ivwpw/pagenation

其中并没有做从数据库插数据的部分,只是在Controller中模拟了页面需要的数据。

以上这篇springMVC+velocity实现仿Datatables局部刷新分页方法就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持呐喊教程。

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