JSON va XML

JSON ham, XML ham veb-serverdan ma'lumotlarni qabul qilish uchun ishlatilishi mumkin.

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Quyidagi JSON va XML misollarining har ikkalasi 3 ta xodimdan iborat massivni o'z ichiga olgan employees obyektini belgilaydi:

JSON misoli

{
  "employees": [
    { "firstName": "John", "lastName": "Doe" },
    { "firstName": "Anna", "lastName": "Smith" },
    { "firstName": "Peter", "lastName": "Jones" }
  ]
}

XML misoli

<employees>
  <employee>
    <firstName>John</firstName> <lastName>Doe</lastName>
  </employee>
  <employee>
    <firstName>Anna</firstName> <lastName>Smith</lastName>
  </employee>
  <employee>
    <firstName>Peter</firstName> <lastName>Jones</lastName>
  </employee>
</employees>

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JSON va XML o'rtasidagi o'xshashliklar

• Ikkalasi ham "o'z-o'zini tavsiflovchi" (human readable — odam tushuna oladigan).
• Ikkalasi ham iyerarxik (qiymatlar ichida qiymatlar).
• Ikkalasini ham ko'plab dasturlash tillari tahlil qilishi (parse) va ishlatishi mumkin.
• Ikkalasini ham XMLHttpRequest yordamida yuklab olish mumkin.

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JSON va XML o'rtasidagi farqlar

• JSON-da yopilish teglari yo'q.
• JSON qisqaroq.
• JSON-ni o'qish va yozish tezroq.
• JSON massivlardan foydalana oladi.

Eng katta farq: XML-ni XML tahlilchisi (parser) bilan tahlil qilish kerak. JSON-ni esa standart JavaScript funksiyasi bilan tahlil qilish mumkin.

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Nima uchun JSON XML-dan yaxshiroq?

XML-ni tahlil qilish JSON-ga qaraganda ancha qiyin. JSON tahlil qilinganda (parse) darhol foydalanishga tayyor JavaScript obyekti hosil bo'ladi.

AJAX ilovalari uchun JSON XML-dan tezroq va osonroq:

XML ishlatilganda:

1. XML hujjatini yuklab olish.
2. Hujjat bo'ylab harakatlanish uchun XML DOM-dan foydalanish.
3. Qiymatlarni ajratib olish va o'zgaruvchilarda saqlash.

JSON ishlatilganda:

1. JSON matnini yuklab olish.
2. JSON matnini JSON.parse yordamida tahlil qilish.
3. Bo'ldi! Ma'lumot tayyor.