?????? JSON
JSON? JavaScript Object Notation? ???, ??? ?? ?????.
JSON?? ??????
JSON? ?? ?? ??? JavaScript Object Notation???.
JSON? ?? ??? ?? ?????.
JSON? ?? ??????. *
JSON? ???? ????.
JSON?? ? ?? ??? ??? ????.
number: JavaScript? ??? ??? ?????.
boolean: JavaScript? true ?? false???.
null: JavaScript? null???.
array: JavaScript? ?? ?????. -
??: {...} ??????? ??
? ? ??? ??.
??? JSON? ???? UTF-8??? ??? ???? ?? ??? ??? ??? ????. ?? ?? ??? ?? JSON ???? ???? ""? ???? ?? ?? ?? ???? ""? ???? ???.
JSON? ?? ???? ??? ? ???? ??? ??? ??? ECMA ??? ?????. ?? ?? ????? ???? JSON? ?? ???? ?? ?????? ???, JavaScript??? JSON ?? ??? ???? ?? ??? JSON? ?? ??? ? ????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
<script type="text/javascript">
var student = new Object();
student.name = "Lanny";
student.age = "25";
student.location = "China";
var json = JSON.stringify(student);
alert(json); //{"name":"Lanny","age":"25","location":"China"}
</script>
</head>
<body>
</body>
</html>JSON? JavaScript ??? ????????.
JSON ??? JavaScript ??? ???? ??? ??? ?????.
???? ??? JavaScript ????? JSON ???? JavaScript ??? ?? ??? ? ????.
JSON ?? ??
???? ?/? ????. ???? ??? ?????. ???? ??? ?????. ???? ??? ?????.
JSON ??? - ??? ??? ??? ?? ?????.
JSON ???? JavaScript ?? ??? ????? ?/? ??? ??????.
?/? ?? ?? ??(???? ?), ??, ??? ?????.
"firstName":"John"
JSON ??
JSON ?? ??? ?? ?????.
JavaScript? ????? ??? ?? ?/? ?? ??? ? ????.
{"firstName":"John", "lastName":"Doe"}
JSON ??
JSON ??? ??? ?? ?????.
JavaScript? ????? ???? ??? ??? ? ????.
"employees":[
?{"firstName":"John", "lastName":"Doe"},
?{"firstName":"Anna", "lastName":"Smith"},
?{"firstName" :"Peter", "lastName":"Jones"}
]
?? ??? "employees" ??? ?????. ? ?? ??? ???? ????.
? ??? ??(?? ??)? ?????.
JSON ???? JavaScript ??? ??
?? ??? ???? JSON ???? ?? ????? ?????.
?? JSON ??? ???? JavaScript ???? ????.
var text = '{ "employees" : [' +
'{ "firstName":"John" , "lastName ": "Doe" },' +
'{ "firstName":"Anna" , "lastName":"Smith" },' +
'{ "firstName":"Peter" , "lastName":"Jones" } ]} ';
?? ?? JavaScript ?? ?? JSON.parse()? ???? ???? JavaScript ??? ?????.
var obj = JSON.parse(text);
????? ????? ??? JavaScript ?? ??:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<p id="demo"></p>
<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[2].firstName + " " + obj.employees[2].lastName;
</script>
</body>
</html>
