因此,在java脚本中,我需要从json中获取密钥的值。但是,如果我给钥匙的对象点名称,然后能够得到它。在java脚本中获取json密钥的值(将密钥名称存储在变量中并使用它)
<script>
var text = '{"employees":[' +
'{"firstName":"John","lastName":"Doe" },' +
'{"firstName":"Anna","lastName":"Smith" },' +
'{"firstName":"Peter","lastName":"Jones" }]}';
obj = JSON.parse(text);
document.getElementById("demo").innerHTML =
obj.employees[1].firstname + " " + obj.employees[1].lastName;
</script>
但是,如果我存储在一个变量中键的名称,并用它来获取键,然后它不是为我工作的价值。
<script>
var text = '{"employees":[' +
'{"firstName":"John","lastName":"Doe" },' +
'{"firstName":"Anna","lastName":"Smith" },' +
'{"firstName":"Peter","lastName":"Jones" }]}';
obj = JSON.parse(text);
fn="firstname";
ln="lastname";
document.getElementById("demo").innerHTML =
obj.employees[1].fn + " " + obj.employees[1].ln;
</script>
我可以理解它正在寻找与fn和ln密钥的问题。任何人都可以解释我怎样才能得到密钥名称存储的变量的值。
使用括号符号来访问在这种情况下https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors值 – Manish
它应该是'firstName'和不'firstname'。请注意,'n'是大写 –