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data class Person( val name: String, val age: Int, val email: String ) fun main() { val json = """ { "name": "John", "age": 30, "email": "john@example.com" } """.trimIndent() val person = parsePerson(json) println("Name: ${person.name}") println("Age: ${person.age}") println("Email: ${person.email}") } fun parsePerson(json: String): Person { val jsonObject = json.trim().removePrefix("{").removeSuffix("}") val name = getValue(jsonObject, "name") val age = getValue(jsonObject, "age")?.toIntOrNull() ?: 0 val email = getValue(jsonObject, "email") return Person(name ?: "", age, email ?: "") } fun getValue(json: String, key: String): String? { val keyValuePairs = json.split(",").map { it.trim() } for (pair in keyValuePairs) { val (k, v) = pair.split(":").map { it.trim() } if (k == "\"$key\"") { return v.removeSurrounding("\"") } } return null } |
