js 怎么获取json中的数据

JavaScript011

js 怎么获取json中的数据,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)

1.前端可以通过Json.parse(str)把字符串str转换为Json格式

2.如果是获取后台数据可以直接用jquery的ajax获取，ajax获取后数据就是json格式