Angularjs实现分页和分页算法的示例代码

站长资源 2024/11/29 佚名

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对于大多数web应用来说显示项目列表是一种很常见的任务。通常情况下，我们的数据会比较多，无法很好地显示在单个页面中。在这种情况下，我们需要把数据以页的方式来展示。

页面展示效果：

页面HTML代码：

<table class="table table-striped" style="margin: 0px;"> 
   <thead> 
    <tr> 
      <td>选择</td> 
      <td>企业名称</td>                
      <td>企业地址</td> 
      <td>状态</td> 
    </tr> 
  </thead> 
  <tbody> 
    <tr ng-repeat="l in list"> 
      <td><input type="radio" name="id" ng-click="select(l.id)" value="{{l.id}}" /></td> 
      <td>{{l.name}}</td> 
      <td>{{l.address}}</td> 
      <td>{{l.status_str}}</td> 
    </tr> 
  </tbody> 
</table> 
<!-- paging --> 
<ul class="pagination" style="margin: 0px;" > 
    <li ng-class="{true:'disabled'}[p_current==1]"><a href="javascript:void(0);" ng-click="p_index()">首页</a></li> 
    <li ng-repeat="page in pages" ng-class="{true:'active'}[p_current==page]"><a href="javascript:void(0);" ng-click="load_page(page)">{{ page }}</a></li> 
    <li ng-class="{true:'disabled'}[p_current==p_all_page]"><a href="javascript:void(0);" ng-click="p_last()">尾页</a></li> 
</ul> 
<span style="vertical-align: 12px;"> 共：{{count}} 条</span>

Js代码：

var app = angular.module("myApp",[]);   
app.controller("map_ctrl",function($scope,$http,$location){ 
  //配置 
  $scope.count = 0; 
  $scope.p_pernum = 10; 
  //变量 
  $scope.p_current = 1; 
  $scope.p_all_page =0; 
  $scope.pages = []; 
  //初始化第一页 
  _get($scope.p_current,$scope.p_pernum,function(){ 
    alert("我是第一次加载"); 
  }); 
  //获取数据 
  var _get = function(page,size,callback){ 
    $http.get("xxx.html"+page+"&size="+size).success(function(res){ 
      if(res&&res.status==1){ 
        $scope.count=res.count; 
        $scope.list=res.list; 
        $scope.p_current = page; 
        $scope.p_all_page =Math.ceil($scope.count/$scope.p_pernum); 
        reloadPno(); 
        callback(); 
      }else{ 
        alert("加载失败"); 
      } 
    });  
  } 
  //单选按钮选中 
  $scope.select= function(id){ 
    alert(id); 
  } 
  //首页 
  $scope.p_index = function(){ 
    $scope.load_page(1); 
  } 
  //尾页 
  $scope.p_last = function(){ 
    $scope.load_page($scope.p_all_page); 
  } 
  //加载某一页 
  $scope.load_page = function(page){ 
    _get(page,$scope.p_pernum,function(){ }); 
  }; 
  //初始化页码 
  var reloadPno = function(){ 
     $scope.pages=calculateIndexes($scope.p_current,$scope.p_all_page,8); 
    }; 
//分页算法 
var calculateIndexes = function (current, length, displayLength) { 
  var indexes = []; 
  var start = Math.round(current - displayLength / 2); 
  var end = Math.round(current + displayLength / 2); 
  if (start <= 1) { 
    start = 1; 
    end = start + displayLength - 1; 
    if (end >= length - 1) { 
      end = length - 1; 
    } 
  } 
  if (end >= length - 1) { 
    end = length; 
    start = end - displayLength + 1; 
    if (start <= 1) { 
      start = 1; 
    } 
  } 
  for (var i = start; i <= end; i++) { 
    indexes.push(i); 
  } 
  return indexes; 
 }; 
  
});

分页算法：

current ：当前页码，length：总页码，displayLength：显示长度 @return array[1,2,3,4,5,6,7,8]

var calculateIndexes = function (current, length, displayLength) { 
  var indexes = []; 
  var start = Math.round(current - displayLength / 2); 
  var end = Math.round(current + displayLength / 2); 
  if (start <= 1) { 
    start = 1; 
    end = start + displayLength - 1; 
    if (end >= length - 1) { 
      end = length - 1; 
    } 
  } 
  if (end >= length - 1) { 
    end = length ; 
    start = end - displayLength + 1; 
    if (start <= 1) { 
      start = 1; 
    } 
  } 
  for (var i = start; i <= end; i++) { 
    indexes.push(i); 
  } 
  return indexes; 
};

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

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