JSON: JSON 用法

2023-01-05 08:17:25

ylbtech-JSON: JSON 用法

1. JSON Object creation in JavaScript返回顶部

1、

<!DOCTYPE html>

<html>

<body>

    <h2>JSON Object creation in JavaScript</h2>

    <p>

        Name:<span id="jname"></span><br />

        Age:<span id="jage"></span><br />

        Address:<span id="jaddress"></span><br />

        Phone:<span id="jphone"></span><br />

    </p>

    <script>

        var JSONObject = {

            "name": "John Johnson",

            "street": "Oslo West 555",

            "age": 33,

            "phone":"555 1234567"

        };

        document.getElementById("jname").innerHTML = JSONObject.name;

        document.getElementById("jage").innerHTML = JSONObject.age;

        document.getElementById("jaddress").innerHTML = JSONObject.street;

        document.getElementById("jphone").innerHTML = JSONObject.phone;

    </script>

</body>

</html>

2、运行结果

JSON Object creation in JavaScript

Name:John Johnson
Age:33
Address:Oslo West 555
Phone:555 1234567

3、

2. Create Object from JSON String返回顶部

1、

<!DOCTYPE html>

<html>

<body>

    <h2>Create Object from JSON String</h2>

    <p>First Name:<span id="fname"></span></p>

    <script>

        var employee = [

     { "firstName": "John", "lastName": "Doe" },

     { "firstName": "Anna", "lastName": "Smith" },

     { "firstName": "Peter", "lastName": "Jones" }

        ];

        employee[1].firstName = "Jonatan";

        document.getElementById("fname").innerHTML = employee[1].firstName;

    </script>

</body>

</html>

2、运行结果

Create Object from JSON String

First Name:Jonatan

3、

3. 从 JSON 字符串中创建对象返回顶部

1、

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8" />

    <title>示例</title>

</head>

<body>

    <h2>从 JSON 字符串中创建对象</h2>

    <p>

        名：<span id="fname"></span><br />

        姓：<span id="lname"></span><br />

    </p>

    <script>

        var txt = '{"employees":[' + '{"firstName":"John","lastName":"Doe"}'

            + ',{"firstName":"Anna","lastName":"Smith"}'

            + ',{"firstName":"Peter","lastName":"Jones"}]}';

        var obj = eval("(" + txt + ")");

        document.getElementById("fname").innerHTML = obj.employees[1].firstName;

        document.getElementById("lname").innerHTML = obj.employees[1].lastName;

    </script>

<script>

    document.getElementById("fname").innerHTML = obj.employees[1].firstName;

    document.getElementById("lname").innerHTML = obj.employees[1].lastName;

</script>

</body>

</html>

2、运行结果

从 JSON 字符串中创建对象

名：Anna
姓：Smith

3、

4. JSONP 实例返回顶部

1、

<!DOCTYPE html>

<html>

<head>

    <title>JSONP 实例</title>

</head>

<body>

    <div id="divCustomers"></div>

    <script type="text/javascript">

        function callbackFunction(result, methodName) {

            var html = '<ul>';

            for (var i = 0; i < result.length; i++) {

                html += '<li>' + result[i] + '</li>';

            }

            html += "</ul>";

            document.getElementById("divCustomers").innerHTML = html;

        }

    </script>

    <script type="text/javascript" src="http://www.runoob.com/try/ajax/jsonp.php?jsoncallback=callbackFunction"></script>

</body>

</html>

2、运行结果

customername1
customername2

3、

5. Create Object from JSON String返回顶部

1、

<!DOCTYPE html>

<html>

<body>

    <h2>Create Object from JSON String</h2>

    <p>

        名：<span id="fname"></span><br />

        姓：<span id="lname"></span><br />

    </p>

    <script>

        var txt = '{"employees":[' + '{"firstName":"John","lastName":"Doe"}'

            + ',{"firstName":"Anna","lastName":"Smith"}'

            + ',{"firstName":"Peter","lastName":"Jones"}]}';

        var obj = JSON.parse(txt);

        document.getElementById("fname").innerHTML = obj.employees[1].firstName;

        document.getElementById("lname").innerHTML = obj.employees[1].lastName;

    </script>

    <script>

    document.getElementById("fname").innerHTML = obj.employees[1].firstName;

    document.getElementById("lname").innerHTML = obj.employees[1].lastName;

    </script>

</body>

</html>

2、运行结果

Create Object from JSON String

名：Anna
姓：Smith

3、

6. JSNP 实例返回顶部

1、

<!DOCTYPE html>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <title>JSNP 实例</title>

    <meta charset="utf-8" />

    <script src="http://apps.bdimg.com/libs/jquery/1.8.3/jquery.js"></script>

</head>

<body>

    <div id="divCustomers"></div>

    <script>

        $.getJSON("http://www.runoob.com/try/ajax/jsonp.php?jsoncallback=?", function (data) {

            var html = '<ul>';

            for(var i=0;i<data.length;i++)

            {

                html += '<li>' +data[i]+ '</li>';

            }

            html += "</ul>";

            $('#divCustomers').html(html);

        });

    </script>

</body>

</html>