從Scala連接到SQL Server數據庫的問題

Question

我想從我的Scala代碼連接到SQL Server數據庫，但我得到'沒有找到合適的驅動程序'異常。我的Scala代碼如下：

import java.sql.{Connection, DriverManager, ResultSet} 


val conn = DriverManager.getConnection("jdbc:sqlserver://hostname:port/DBName?user=myusername&password=mypassword") 
try { 
    val statement = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY) 
    val rs = statement.executeQuery("select * from SomeTableName") 
    while(rs.next()) { 
     println(rs.getInt("CustomerID")) 
    } 

} 
catch { 
    case e => e.printStackTrace() 
} 
finally { 
    conn.close() 
} 

我然後跑以下命令：

scala -cp /usr/lib/jtds-1.2.5.jar dbprog.scala 

我一直在使用JDBC的JAR由微軟sqljdbc.jar和sqljdbc4.jar提供SQL Server還嘗試了。

及以下的堆棧跟蹤我得到：

java.sql.SQLException: No suitable driver found for jdbc:sqlserver://hostname:port/DBName?user=myusername&password=mypassword 
     at java.sql.DriverManager.getConnection(DriverManager.java:602) 
     at java.sql.DriverManager.getConnection(DriverManager.java:207) 
     at Main$$anon$1.<init>((virtual file):8) 
     at Main$.main((virtual file):4) 
     at Main.main((virtual file)) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
     at java.lang.reflect.Method.invoke(Method.java:597) 
     at scala.tools.nsc.ObjectRunner$$anonfun$run$1.apply(ObjectRunner.scala:75) 
     at scala.tools.nsc.ObjectRunner$.withContextClassLoader(ObjectRunner.scala:49) 
     at scala.tools.nsc.ObjectRunner$.run(ObjectRunner.scala:74) 
     at scala.tools.nsc.ScriptRunner$.scala$tools$nsc$ScriptRunner$$runCompiled(ScriptRunner.scala:381) 
     at scala.tools.nsc.ScriptRunner$$anonfun$runScript$1.apply(ScriptRunner.scala:414) 
     at scala.tools.nsc.ScriptRunner$$anonfun$runScript$1.apply(ScriptRunner.scala:413) 
     at scala.tools.nsc.ScriptRunner$.withCompiledScript(ScriptRunner.scala:351) 
     at scala.tools.nsc.ScriptRunner$.runScript(ScriptRunner.scala:413) 
     at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:168) 
     at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala) 

什麼我做錯了，我該如何解決呢？

Answer 1

嘗試包括這個領先你的getConnection的（修改以反映SQLServer的驅動程序）

classOf[com.mysql.jdbc.Driver] 

我寫了使用JDBC和Scala這裏的一個完整的例子 http://solog.co/36/using-scala-with-jdbc-to-connect-to-mysql/

Answer 2

更換

val conn = DriverManager.getConnection("jdbc:sqlserver://hostname:port/DBName?user=myusername&password=mypassword") 

與

Class.forName("net.sourceforge.jtds.jdbcx.JtdsDataSource") 
val conn = DriverManager.getConnection("jdbc:jtds:sqlserver://hostname:port/DBName","myusername","mypassword") 

Answer 3

喬 您需要做的！

import java.sql.{Connection, DriverManager, ResultSet} 

Class.forName("org.postgresql.Driver") 
val conn = DriverManager.getConnection("jdbc:postgresql://localhost:5432/clients","username","password") 

然後下載的罐子分貝 如果你需要的PostgreSQL和我一樣:-D wget的postgresql-9.0-801.jdbc3.jar 或~mysql.jar

exec: scala -cp postgresql-9.0-801.jdbc3.jar file.scala

Answer 4

我發現這段代碼爲我工作：

嘗試使用以下方法註冊您的驅動程序：

java.sql.DriverManager.registerDriver(new net.sourceforge.jtds.jdbc.Driver) 

，而不是使用 classOf[net.sourceforge.jtds.jdbc.Driver]或Class.forName("net.sourceforge.jtds.jdbc.Driver")，

例如：

val uri = "jdbc:jtds:sqlserver://localhost:1433/yourdatabae" 
    val username = "username" 
    val password = "password" 

    DriverManager.registerDriver(new net.sourceforge.jtds.jdbc.Driver) 

    private val conn: Connection = DriverManager.getConnection(uri, username, password) 

    def getConn(): Connection = conn 

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

    val sql = "SELECT SOMETHING FROM YOURTABLE" 
    val results = getConn.createStatement.executeQuery(sql) 

    processResults(results) 

    getConn.close 

    }