MySQL Database from Kotlin using JDBC
Code untuk koneksi dan show mysql :
import java.sql.*
import java.util.Properties
/**
* Program to list databases in MySQL using Kotlin
*/
object MySQLDatabaseExampleKotlin {
internal var conn: Connection? = null
internal var username = "username" // provide the username
internal var password = "password" // provide the corresponding password
@JvmStatic fun main(args: Array<String>) {
// make a connection to MySQL Server
getConnection()
// execute the query via connection object
executeMySQLQuery()
}
fun executeMySQLQuery() {
var stmt: Statement? = null
var resultset: ResultSet? = null
try {
stmt = conn!!.createStatement()
resultset = stmt!!.executeQuery("SHOW DATABASES;")
if (stmt.execute("SHOW DATABASES;")) {
resultset = stmt.resultSet
}
while (resultset!!.next()) {
println(resultset.getString("Database"))
}
} catch (ex: SQLException) {
// handle any errors
ex.printStackTrace()
} finally {
// release resources
if (resultset != null) {
try {
resultset.close()
} catch (sqlEx: SQLException) {
}
resultset = null
}
if (stmt != null) {
try {
stmt.close()
} catch (sqlEx: SQLException) {
}
stmt = null
}
if (conn != null) {
try {
conn!!.close()
} catch (sqlEx: SQLException) {
}
conn = null
}
}
}
/**
* This method makes a connection to MySQL Server
* In this example, MySQL Server is running in the local host (so 127.0.0.1)
* at the standard port 3306
*/
fun getConnection() {
val connectionProps = Properties()
connectionProps.put("user", username)
connectionProps.put("password", password)
try {
Class.forName("com.mysql.jdbc.Driver").newInstance()
conn = DriverManager.getConnection(
"jdbc:" + "mysql" + "://" +
"127.0.0.1" +
":" + "3306" + "/" +
"",
connectionProps)
} catch (ex: SQLException) {
// handle any errors
ex.printStackTrace()
} catch (ex: Exception) {
// handle any errors
ex.printStackTrace()
}
}
}
Hasil :
information_schema
mysql
performance_schema
studentsDB
sys
