CAP指的是Common Alerting Protocol，它是一種在不同組織和系統間進行警報信息交換的標準化協議。而JSON是一種輕量級的數據交換格式。

將CAP轉換成JSON格式，可以方便地將警報信息在不同系統之間進行傳遞和處理。以下是一個將CAP轉換成JSON格式的示例代碼：

{
"alert": {
"status": "Actual",
"msgType": "Alert",
"scope": "Public",
"category": ["Geo", "Safety"],
"event": "Evacuation",
"urgency": "Immediate",
"severity": "Extreme",
"certainty": "Observed",
"headline": "Evacuation Order Issued",
"description": "A mandatory evacuation order has been issued for the area below the dam.",
"instruction": "Evacuate now! Do not delay!",
"source": "National Weather Service",
"web": "http://www.weather.gov",
"contact": "Emergency Management Office",
"parameter": [
{
"valueName": "AreaDesc",
"value": "Area below dam"
},
{
"valueName": "CrisisName",
"value": "Dam Failure"
},
{
"valueName": "MessageType",
"value": "Evacuation Order"
}
],
"resource": [
{
"resourceDesc": "Evacuation Map",
"uri": "http://www.example.com/evacmap.jpg",
"mimeType": "image/jpeg",
"size": "1000"
},
{
"resourceDesc": "Emergency Shelter List",
"uri": "http://www.example.com/shelterlist.pdf",
"mimeType": "application/pdf",
"size": "500"
}
],
"area": {
"areaDesc": "Area below dam",
"polygon": "34.4,-119.77 34.4,-119.75 34.35,-119.75 34.35,-119.77 34.4,-119.77"
},
"effective": "2022-04-23T15:20:00-04:00",
"onset": "2022-04-23T15:20:00-04:00",
"expires": "2022-04-23T16:20:00-04:00",
"senderName": "National Weather Service",
"headlineLang": "en"
}
}

在將CAP轉換成JSON格式時，需要注意將CAP中的每個元素正確對應到JSON格式的鍵值對中。例如，CAP中的category字段對應的是一個數組，而JSON中的category對應的是一個字符串數組。