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c 如何傳json 到頁面上

林國瑞2年前9瀏覽0評論

如何在C中將JSON傳遞到頁面上?這里有一些步驟來幫助您完成這項任務。

第一步是選擇一個JSON庫。C中有許多開源JSON庫可供選擇,這里我們以 cJSON 為例。

{
"name": "John Doe",
"age": 25,
"isMarried": true,
"hobbies": ["reading", "music", "traveling"],
"address": {
"street": "123 Main St",
"city": "Anytown",
"state": "CA"
}
}

第二步是將JSON數據轉換為字符串格式。cJSON庫提供了一個函數cJSON_Print來完成這個任務:

cJSON *json = cJSON_CreateObject();
cJSON_AddStringToObject(json, "name", "John Doe");
cJSON_AddNumberToObject(json, "age", 25);
cJSON_AddBoolToObject(json, "isMarried", true);
cJSON *hobbies = cJSON_CreateArray();
cJSON_AddItemToArray(hobbies, cJSON_CreateString("reading"));
cJSON_AddItemToArray(hobbies, cJSON_CreateString("music"));
cJSON_AddItemToArray(hobbies, cJSON_CreateString("traveling"));
cJSON_AddItemToObject(json, "hobbies", hobbies);
cJSON *address = cJSON_CreateObject();
cJSON_AddStringToObject(address, "street", "123 Main St");
cJSON_AddStringToObject(address, "city", "Anytown");
cJSON_AddStringToObject(address, "state", "CA");
cJSON_AddItemToObject(json, "address", address);
char *jsonStr = cJSON_Print(json);

第三步是將JSON字符串傳遞給前端頁面。這可以通過將JSON字符串放在HTML頁面中的script標簽中來完成:

<html>
<head>
<script>
var jsonData = JSON.parse('{ "name": "John Doe", "age": 25, "isMarried": true, "hobbies": ["reading", "music", "traveling"], "address": { "street": "123 Main St", "city": "Anytown", "state": "CA" } }');
// Do something with the JSON data
</script>
</head>
<body>
</body>
</html>

現在,您已經了解了如何在C中將JSON傳遞到前端頁面,讓前端JavaScript代碼可以解析并使用它。如果您正在開發一個C-based后端服務器,并且需要向前端傳遞JSON數據,這將是一種非常有用的技能。