Scala之Demo1

package com.test
import java.sql.DriverManager
import java.sql.Connection

object SingleMySqlConn {

private var driver = "com.mysql.jdbc.Driver"
private var url = "jdbc:mysql://localhost/bms"
private var connection: Connection = null;

def getConnection(username: String, password: String): Connection = {

if (connection == null) {

try {

Class.forName(driver)
connection = DriverManager.getConnection(url, username, password)

connection
}
catch{

case e=>e.printStackTrace()
null
}

} else {

connection
}

}
}

package com.test
import java.sql.DriverManager
import java.sql.Connection

object ScalaMySql {

def main(args: Array[String]): Unit = {

val connection = SingleMySqlConn.getConnection("root", "123")

if (connection != null) {

val statement = connection.createStatement()
val resultSet = statement.executeQuery("SELECT * FROM bms_appuser")
while (resultSet.next()) {
val userName = resultSet.getString("userName")
val userCard = resultSet.getString("userCard")
println("userName, <span style="font-family: Arial, Helvetica, sans-serif;">userCard </span>= " + userName + ", " + userCard)
}
connection.close()
}

}
}

</pre><pre name="code" class="java">userName, userCard = zhao, XSJKLKL
userName, userCard = cui, <span style="font-family: Arial, Helvetica, sans-serif;">XSJKLKK</span>