3.分页查询方法

<div class="jb51code">
<pre class="brush:js;">
'use strict';
angular.module('app').factory('PageSync',['$http','$q',function Page($http,$q) {
var rowCollectionPage = [];
var totalPage = 1;
var pages = [];
var endPage = 1;
var load = function(url,currentPage,pageSize,deferred) {
var json = {rowCollectionPage: [],totalPage: 1,currentPage:currentPage ? currentPage:1,pages: []};
$http.get(url).success(function(rows) {
rowCollectionPage = setPageRow(rows.list,pageSize);
// 获取总页数
totalPage = Math.ceil(rows.count / pageSize);
endPage = totalPage;
// 生成数字链接
if (totalPage <= 7) {
pages = getPagesLow(totalPage);
} else {
pages = getPagesHigh(currentPage,totalPage);
}
json.rowCollectionPage = rowCollectionPage;
json.totalPage = totalPage==0 ? 1 : totalPage;
json.currentPage = currentPage;
json.pages = pages;
json.count = rows.count;
json.pageSize = pageSize;
/**

• 自定义字段，初始化的时候为before，只要经过该分页方法，则字段值变为after
• before表示未经过该分页方法，after表示经过该分页方法，
• 前台页面加载的规则：为before时表示表格无数据，为after且pataData.count==0时无数据，否则视为有数据，
• 也可以说是记录的一个时间状态（访问数据前及返回数据后）
  */
  json.loadTime = 'after';
  deferred.resolve(json);
  });
  return deferred.promise;
  };
  // 总页数小于等于7时 显示所有的页数
  var getPagesLow = function(totalPage) {
  var temp = [];
  for (var i=1; i<totalPage+1; i++) {
  temp.push(i);
  }
  return temp;
  };
  // 总页数大于7时 根据当前页获取7个页码数
  var getPagesHigh = function(currentPage,totalPage) {
  var temp = [];
  if (currentPage < 4) {
  temp = [1,2,3,4,5,'...',totalPage];
  } else if ((totalPage - currentPage) <= 3) {
  temp = [
  totalPage - 6,totalPage - 5,totalPage - 4,totalPage - 3,totalPage - 2,totalPage - 1,totalPage
  ];
  } else {
  temp = [
  currentPage - 2,currentPage - 1,currentPage + 1,currentPage + 2,totalPage
  ];
  }
  return temp;
  };
  // 项目中table的高度是根据浏览器窗口的高度计算的来的，是动态的
  // 因为要把分页固定在table最下方，所以无数据的用空行进行代替
  var setPageRow = function(rowArr,pageSize) {
  var temp = [];
  if (rowArr != undefined) {
  for (var i = 0; i < rowArr.length; i++) {
  temp.push(rowArr[i]);
  }
  for (var j = 0; j < pageSize - rowArr.length; j++) {
  temp.push({});
  }
  } else {
  for (var k = 0; k < pageSize; k++) {
  temp.push({});
  }
  }
  return temp;
  };
  return {
  load: function(url,pageSize) {
  var deferred = $q.defer();
  url += '&' + currentPage + '&' + pageSize;
  return load(url,deferred);
  },next: function(url,pageSize) {
  var deferred = $q.defer();
  if (currentPage < endPage) {
  currentPage++;
  }
  url += '&' + currentPage + '&' + pageSize;
  return load(url,prev: function(url,pageSize) {
  var deferred = $q.defer();
  currentPage--;
  url += '&' + currentPage + '&' + pageSize;
  return load(url,loadPage: function(url,page) {
  var deferred = $q.defer();
  if (currentPage != page) {
  currentPage = page;
  url += '&' + currentPage + '&' + pageSize;
  return load(url,deferred);
  }
  }
  }
  }]);