1.angular过滤器，是用于对数据的格式化，或者筛选的函数，可以直接在模板中通过一种语法使用

{{expression | filter}}

{{expression | filter1 | filter2}}

{{expression | filter1:param,...}}

2.过滤器的种类

number数字

{{123456789| number}}运行结果    ---->123,456,789{{123456789|number:3}}---->123,456,789.000

currency

{{1234566789| currency}}--->$1,234,566,789.00{{1234566789| currency：'rmb'}}--->rmb1,234,566,789.00

date

today:{{today}}

---->today:"2017-04-25T11:21:11.125Z"

medium:{{today|date:'medium'}}

---->medium:Apr 25, 2017 7:21:11 PM

short:{{today|date:'short'}}

---->short:4/25/17 7:21 PM

fullDate:{{today|date:'fullDate'}}

---->fullDate:Tuesday, April 25, 2017

longDate:{{today|date:'longDate'}}

---->longDate:April 25, 2017

mediumDate:{{today|date:'mediumDate'}}

---->mediumDate:Apr 25, 2017

shortDate:{{today|date:'shortDate'}}

---->shortDate:4/25/17

meduiTime:{{today|date:'meduiTime'}}

---->meduiTime:21e25uiTi21e

shortTime:{{today|date:'shortTime'}}

---->shortTime:7:21 PM

years{{today|date: 'y'}}{{today|date: 'yy'}}--->years 2017 17

month{{today|date: 'M'}}{{today|date: 'MM'}}{{today|date: 'MMM'}}{{today|date: 'MMMM'}}--->month 4 04 Apr April

day{{today|date: 'd'}}{{today|date: 'dd'}}{{today|date: 'EEE'}}{{today|date: 'EEEE'}}--->day 25 25 Tue Tuesday

hour{{today|date: 'HH'}}{{today|date: 'H'}}{{today|date: 'hh'}}{{today|date: 'h'}}--->hour 19 19 07 7

minute{{today|date: 'm'}}{{today|date: 'mm'}}---->minute 40 40

minute{{today|date: 's'}}{{today|date: 'ss'}}{{today|date: '.sss'}}--->minute 39 39 .817

{{today|date: 'y-M-dH:m:s'}}--->2017-4-25 19:40:39

json 主要用于调试作用

在js中使用过滤器，必须首先注入$filter//过滤varnumber = $filter('number')(3000);console.log(number);varjsonString = $filter('json')($scope.data);console.log(jsonString);

limitTo

{{[1,2,3,4,5,6,7,8,9,10] | limitTo:5}}    ---->[1,2,3,4,5] {{[1,2,3,4,5,6,7,8,9,10] | limitTo:-5}}  ---->[6,7,8,9,10]

lowercase 小写

uppercase 大写

filter 过滤（string | function | object）

varapp = angular.module('myCart',[]);app.factory('messageFactory',function(){return{        city:[{            name:'上海',            py:'shanghai'},{            name:'北京',            py:'beijing'},{            name:'四川',            py:'sichuan'}];    };});app.controller('firstController',['$scope','messageFactory',function($scope,messageFactory){$scope.data = messageFactory;}]);

{{ data.city | filter : '上'}}

{{ data.city | filter : 'name'}}

{{ data.city | filter : {name:'上'} }}

{{ data.city | filter : {py:'g'} }}

运行结果：[{"name":"上海","py":"shanghai"}][][{"name":"上海","py":"shanghai"}][{"name":"上海","py":"shanghai"},{"name":"北京","py":"beijing"}]

自定义方法实现过滤var app = angular.module('myCart',[]);app.factory('messageFactory',function() {    return {        city:[{            name:'上海',            py:'shanghai'},{            name:'北京',            py:'beijing'},{            name:'四川',            py:'sichuan'}]    };});js 代码app.controller('firstController',['$scope','messageFactory',function($scope,messageFactory) {$scope.data = messageFactory;$scope.checkName = function (obj) {    if (obj.py.indexOf('h') == -1)        return false;    return true;}}]);html 代码

{{ data.city | filter : checkName}}

运行结果[{"name":"上海","py":"shanghai"},{"name":"四川","py":"sichuan"}]

orderBy(String | function | object) 排序，默认是正序，如果要 反序则在前面加负号-

varapp = angular.module('myCart',[]);app.factory('messageFactory',function(){return{        city:[{            name:'上海',            py:'shanghai'},{            name:'北京',            py:'beijing'},{            name:'四川',            py:'sichuan'}];    };});app.controller('firstController',['$scope','messageFactory',function($scope,messageFactory){$scope.data = messageFactory;}]);

{{ data.city | orderBy : 'py' }}

{{ data.city | orderBy : '-py'}}

运行结果：[{"name":"北京","py":"beijing"},{"name":"上海","py":"shanghai"},{"name":"四川","py":"sichuan"}][{"name":"四川","py":"sichuan"},{"name":"上海","py":"shanghai"},{"name":"北京","py":"beijing"}]