为什么我无法使用JSON.parse（）解析此JSON字符串

Question

I have this JSON String:

[{'Datum': 1465689600, 'Anwesend': false},{'Datum': 1465603200, 'Anwesend': false},{'Datum': 1465516800, 'Anwesend': false},{'Datum': 1465430400, 'Anwesend': false},{'Datum': 1465344000, 'Anwesend': false},{'Datum': 1465257600, 'Anwesend': false},{'Datum': 1465171200, 'Anwesend': false}]

and I want to parse this String. I tried:

var res = $.parseJSON(anwesendstr);

and:

var res = JSON.parse(anwesendstr);

But everytime I get a:

SyntaxError: Unexpected token ' in JSON at position 2

Exception

Can I anybody help me to fix it?

Answer 1

In JSON, strings and object property names must be enclosed in double quotes. Your strings are enclosed in single quotes. Change it to:

[{"Datum": 1465689600, "Anwesend": false},{"Datum": 1465603200, "Anwesend": false},{"Datum": 1465516800, "Anwesend": false},{"Datum": 1465430400, "Anwesend": false},{"Datum": 1465344000, "Anwesend": false},{"Datum": 1465257600, "Anwesend": false},{"Datum": 1465171200, "Anwesend": false}]

and it will work.

You should use a library function to create JSON, rather than constructing it by hand in your code, to avoid problems like this. A library will also correctly escape embedded quotes and slashes in the JSON.