请问一下 js 如何获取 json 中的某个特定的值?

Question

var prim ={"学生证号":[{"text":"31123","hash":"C3B9B7DADC94F7","key":"txt_SqrCard","value":"31123"}]}

请问一下 js 如何获取 prim 中的 text 的值，多谢多谢

Answer 1

var prim ={"学生证号": [{"text":"31123","hash":"C3B9B7DADC94F7","key":"txt_SqrCard","value":"31123"}]};
function findValue(obj, target) {
    var getType = function(arg) {
        typeRe = /^\[object (\w+)\]$/;
        return typeRe.exec(Object.prototype.toString.call(obj))[1];
    };
    var pushStack = function(arr, obj) {
        var type = getType(obj);
        if (type === 'Array' || type === 'Object') {
            Array.prototype.unshift[type === 'Array' ? 'apply' : 'call'](arr, obj);
        }
        return arr;
    };
    var stack = pushStack([], obj);
    var ret = null;
    forEach: while (stack.length) {
        var tmp = stack.shift();
        for (var key in tmp) {
            var val = tmp[key];
            if (key === target) {
                ret = val;
                break forEach;
            } else pushStack(stack, val);
        }
    }
    return ret;
}
console.log(findValue(prim, "text"));

Answer 2

支持ES6的话：

let { "学生证号": [
  {text}
]} = prim;
console.log(text);    // '31123'

Answer 3

先吐槽下数据结构，中文做key？一句话就是数据结构太烂！