js怎样读取json里面的数据 js怎么读取本地的 json数据
JS\u600e\u4e48\u8bfb\u53d6txt\u6587\u4ef6\u4e2d\u7684json\u6570\u636e\u628a\u4f60\u7684\u8fd9\u4e2a.txt\u6587\u4ef6\uff0c\u6539\u6210.json\u6587\u4ef6\uff08.js\u4e5f\u53ef\u4ee5\uff09\uff1b
\u4f60\u53ef\u4ee5\u505a\u4e00\u4e2a\u6d4b\u8bd5\uff0c\u5c06\u4f60\u7684.json\u6587\u4ef6\u548c\u4f60\u7684\u8c03\u7528js\u6587\u4ef6\u548c\u4f60\u7684\u9875\u9762\u653e\u5728\u4e00\u4e2a\u76ee\u5f55\u4e0b\uff1b\u7136\u540e$.getJSON(url, function(data){ // todo }); // \u8fd9\u91cc\u7684url\u76f4\u63a5\u662fxx.json
\u5982\u679c\u4f60\u7684\u9875\u9762\u548c.js\u6587\u4ef6\u548c.json\u6587\u4ef6\u4e0d\u518d\u4e00\u4e2a\u76ee\u5f55\uff0c\u5c31\u8981\u5c06url\u5199\u6210\u9875\u9762\u76f8\u5bf9\u4e8e.json\u6587\u4ef6\u7684\u8def\u5f84\u3002
\u6216\u8005\u7b49\u7b49\u4e0d\u4e00\u800c\u8db3\u3002
var json = { contry:{ area:{ man:"12\u4e07", women:"10\u4e07" } } };
//\u65b9\u5f0f\u4e00\uff1a\u4f7f\u7528eval\u89e3\u6790
var obj = eval(json);
alert(obj.constructor);
alert(obj.contry.area.women);
//\u65b9\u5f0f\u4e8c\uff1a\u4f7f\u7528Funtion\u51fd\u6570
var strJSON = "{name:'json name'}";//\u5f97\u5230\u7684JSON
var obj = new Function("return" + strJSON)();//\u8f6c\u6362\u540e\u7684JSON\u5bf9\u8c61
alert(obj.name);//json name
alert(obj.constructor);
//\u590d\u6742\u4e00\u70b9\u7684json\u6570\u7ec4\u6570\u636e\u7684\u89e3\u6790
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);
//\u590d\u6742\u4e00\u70b9\u7684json\u7684\u53e6\u4e00\u79cd\u5f62\u5f0f
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);
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);
最简单的方法就是将Json字符串转成对象吧，然后通过对象读取数据
JSON.parse方法
result.rows[0].child 结果是0 result.rows[0].name 结果是物理环境安全 result.rows[1].name 结果是 网络安全 就这样用的
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