objectDatabaseConnection{init{// 初始化数据库连接println("Database connection established.")}funqueryDatabase(query:String):String{return"Result for query:$query"}} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 在这个例子中,DatabaseCon
为了帮助理解系统的构建,下面是一个简单的类图示例,表明了如何组织 Kotlin 代码: managesDatabaseConnection+connect()+disconnect()User+id: Int+username: String+email: String 结论 通过本文,我们简要介绍了如何使用 Kotlin 连接 MySQL 数据库,包括环境准备、代码示例及系统设计类图和甘特图。使用 Kotlin 编程语言与...
Apply 允许直接访问对象的成员,而无需显式引用对象,从而使代码更加简洁和流畅。 class DatabaseConnection { var host: String = "" var port: Int = 0 var dbName: String = "" var username: String = "" var password: String = "" fun connect { println("Connecting to database $dbName at $host...
() val pwd =environment .config .property(if (env == "LOCAL") KEY_LOCAL_DB_PWD else KEY_REMOTE_DB_PWD) .getString() //连接数据库 Database.connect(url = url, driver = driver, user = user, password = pwd) //创建数据库表 transaction { tables.forEach { SchemaUtils.create(it) } ...
packageorg.exampleimportorg.jetbrains.exposed.sql.*funmain(){Database.connect("jdbc:h2:mem:test",driver="org.h2.Driver")} TheDatabase.connect()function creates an instance of a class that represents the database and takes two or more parameters. In this case, the connection URL and the dr...
(env=="LOCAL")KEY_LOCAL_DB_USERelseKEY_REMOTE_DB_USER).getString()valpwd=environment.config.property(if(env=="LOCAL")KEY_LOCAL_DB_PWDelseKEY_REMOTE_DB_PWD).getString()//连接数据库Database.connect(url=url,driver=driver,user=user,password=pwd)//创建数据库表transaction{tables.forEach{...
importco.touchlab.sqliter.createDatabaseManagerpublicactualfunopenDatabase(config:DatabaseConfiguration):DatabaseConnection{createDatabaseManager(configNative).createMultiThreadedConnection()//...} 上面的只是示例,在 sqllin-driver 的真实实现中会更为复杂一些。 至此,...
privateval executiveMutex by lazy{Mutex()}publicsuspend infix fun<T>suspendedScope(block:suspend DatabaseScope.()->T):T{val databaseScope=DatabaseScope(databaseConnection,enableSimpleSQLLog)val result=databaseScope.block()executiveMutex.withLock{databaseScope.executeAllStatements()}returnresult} ...
val databaseScope = DatabaseScope(databaseConnection, enableSimpleSQLLog) val result = databaseScope.block() executiveMutex.withLock { databaseScope.executeAllStatements() } return result } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. ...
*/objectMySQLDatabaseExampleKotlin{internalvarconn:Connection?=nullinternalvarusername="username"// provide the usernameinternalvarpassword="password"// provide the corresponding password@JvmStaticfunmain(args:Array<String>){// make a connection to MySQL ServergetConnection()// execute the query via con...