js怎么读取本地的 json数据

JavaScript026

js怎么读取本地的 json数据,第1张

var

json

=

{

contry:{

area:{

man:"12万",

women:"10万"

}

}

}

//方式一:使用eval解析

var

obj

=

eval(json)

alert(obj.constructor)

alert(obj.contry.area.women)

//方式二:使用Funtion函数

var

strJSON

=

"{name:'json

name'}"//得到的JSON

var

obj

=

new

Function("return"

+

strJSON)()//转换后的JSON对象

alert(obj.name)//json

name

alert(obj.constructor)

//复杂一点的json数组数据的解析

var

value1

=

[{"c01":"1","c02":"2","c03":"3","c04":"4","c05":"5","c06":"6","c07":"7","c08":"8","c09":"9"},

{"c01":"2","c02":"4","c03":"5","c04":"2","c05":"8","c06":"11","c07":"21","c08":"1","c09":"12"},

{"c01":"5","c02":"1","c03":"4","c04":"11","c05":"9","c06":"8","c07":"1","c08":"8","c09":"2"}]

var

obj1

=

eval(value1)

alert(obj1[0].c01)

//复杂一点的json的另一种形式

var

value2

=

{"list":[

{"password":"1230","username":"coolcooldool"},

{"password":"thisis2","username":"okokok"}],

"array":[{"password":"1230","username":"coolcooldool"},{"password":"thisis2","username":"okokok"}]}

var

obj2

=

eval(value2)

alert(obj2.list[0].password)

用angularjs读取本地json的方法如下:

1、本地json文件的内容如下:

[{ "text":"learn angular", "done":true },

{ "text":"build an angular app", "done":false},

{ "text":"something", "done":false },

{ "text":"another todo", "done":true }]

2、利用angularjs读取的方法:

var App = angular.module('App', [])

App.controller('TodoCtrl', function($scope, $http) {

$http.get('todos.json')

.then(function(res){

$scope.todos = res.data

})

})

如果要使用js读取json文件,那么ajax操作是必须的了。原生ajax有点麻烦,我想你们项目一定用了什么js库,这里给个jquery的例子:

$.get('xx.json路径', function(data){

    alert(data) // data即为json文件内容里的json数据

}, 'json')

如果把这个文件的内容读取为纯文本,可以修改$.get的最后一个参数json为text,或者删掉这个参数,默认也是text。