一、添加依赖

build.gradle.kts(:app)

 // gson数据解析implementation("com.google.code.gson:gson:2.8.6")

对象类：

// 对象类
class Account {var uid:String = "00001"var userName:String = "Freeman"var password:String = "admin"var telNumber:String = "13000000000"override fun toString(): String {return "Account(uid='$uid', userName='$userName', password='$password', telNumber='$telNumber')"}
}

JSON和对象互相转换：

   // 测试所需json字符串val json = "{\"uid\":\"00001\",\"userName\":\"Freeman\",\"telNumber\":\"13000000000\"}"/*** JSON转换为对象* */val gson = Gson()val account = gson.fromJson<Account>(json,Account::class.java)println("json转换为对象：${account.toString()}")/*** 对象转换为JSON* */val accountJson:String = gson.toJson(account)println("对象转换为json:${accountJson}")

输出结果：

JSON和集合相互转换：

 // 测试所需json字符串val json = "[{\"uid\":\"00001\",\"userName\":\"Freeman\",\"telNumber\":\"13000000000\"}," +"{\"uid\":\"00002\",\"userName\":\"man\",\"telNumber\":\"13000000001\"}]"/*** JSON转换为集合* */val gson = Gson()val accountList = gson.fromJson<List<Account>>(json,object:TypeToken<List<Account>>(){}.type)println("JSON转换为集合:${accountList}")println("集合数：${accountList.size}")/*** 集合转换为JSON* */val jsonList = gson.toJson(accountList)println("集合转换为JSON:${jsonList}")