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JSON.stringify 函数 (JavaScript)

将 JavaScript 值转换为 JavaScript 对象表示法 (Json) 字符串。

JSON.stringify(value [, replacer] [, space])

使用 JSON.stringify 将 contact 对象转换为 JSON 文本。 定义 memberfilter 数组以便只转换surname 和 phone 成员。 省略 firstname 成员。

var contact = new Object();contact.firstname = "Jesper";contact.surname = "Aaberg";contact.phone = ["555-0100", "555-0120"];var memberfilter = new Array();memberfilter[0] = "surname";memberfilter[1] = "phone";var jsonText = JSON.stringify(contact, memberfilter, "\t");document.write(jsonText);// Output:// { "surname": "Aaberg", "phone": [ "555-0100", "555-0120" ] }

将 JSON.stringify 与一个数组一起使用。 replaceToUpper 函数将数组中的每个字符串转换为大写形式。

var continents = new Array();continents[0] = "Europe";continents[1] = "Asia";continents[2] = "Australia";continents[3] = "Antarctica";continents[4] = "North America";continents[5] = "South America";continents[6] = "Africa";var jsonText = JSON.stringify(continents, replaceToUpper);function replaceToUpper(key, value) {    return value.toString().toUpperCase();}//Output:// "EUROPE,ASIA,AUSTRALIA,ANTARCTICA,NORTH AMERICA,SOUTH AMERICA,AFRICA"

使用 toJSON 方法将字符串值转换为大写形式。

var contact = new Object();contact.firstname = "Jesper";contact.surname = "Aaberg";contact.phone = ["555-0100", "555-0120"];contact.toJSON = function(key) {    var replacement = new Object();    for (var val in this)    {        if (typeof (this[val]) === ‘string‘)            replacement[val] = this[val].toUpperCase();        else            replacement[val] = this[val]    }    return replacement;};var jsonText = JSON.stringify(contact);document.write(jsonText);// Output:{"firstname":"JESPER","surname":"AABERG","phone":["555-0100","555-0120"]}‘{"firstname":"JESPER","surname":"AABERG","phone":["555-0100","555-0120"]}‘*/

 

JSON.stringify 函数 (JavaScript)