swift 3中的JSON解析

import Foundation

let jsonString = """
{
    "name": "John",
    "age": 30,
    "isStudent": true,
    "hobbies": ["reading", "swimming", "coding"],
    "address": {
        "street": "123 Main St",
        "city": "New York"
    }
}
"""

if let jsonData = jsonString.data(using: .utf8) {
    do {
        if let json = try JSONSerialization.jsonObject(with: jsonData, options: []) as? [String: Any] {
            let name = json["name"] as? String
            let age = json["age"] as? Int
            let isStudent = json["isStudent"] as? Bool
            let hobbies = json["hobbies"] as? [String]
            let address = json["address"] as? [String: String]
            
            print("Name: \(name ?? "")")
            print("Age: \(age ?? 0)")
            print("Is Student: \(isStudent ?? false)")
            print("Hobbies: \(hobbies ?? [])")
            print("Address: \(address ?? [:])")
        }
    } catch {
        print("JSON parsing error: \(error)")
    }
}