Fehler beim Verbinden mit SQ-Server von Java: java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver

Question

Ich verwende diesen Code:

import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.ResultSet; 
import java.sql.Statement; 

public class ConnectMSSQLServer 
{ 
    public void dbConnect(String db_connect_string, String db_userid, String db_password) 
    { 
     try { 
      Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); 
      Connection conn = DriverManager.getConnection(db_connect_string, db_userid, db_password); 
      System.out.println("connected"); 
      Statement statement = conn.createStatement(); 
      String queryString = "select * from sysobjects where type='u'"; 
      ResultSet rs = statement.executeQuery(queryString); 
      while (rs.next()) { 
       System.out.println(rs.getString(1)); 
      } 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 

    public static void main(String[] args) 
    { 
     ConnectMSSQLServer connServer = new ConnectMSSQLServer(); 
     connServer.dbConnect("jdbc:sqlserver://C1A\\SQL1A", "P", "G31les"); 
    } 
} 

Aber ich bekomme diese Fehlermeldung:

"C:\Program Files\Java\jdk1.8.0_91\bin\java" -Didea.launcher.port=7532 "-Didea.launcher.bin.path=C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 2016.2\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_91\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_91\jre\lib\rt.jar;C:\Users\wmoscoso\Desktop\SaturnLittleBrother\out\production\SaturnLittleBrother;C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 2016.2\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain ConnectMSSQLServer 
java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
    at java.lang.Class.forName0(Native Method) 
    at java.lang.Class.forName(Class.java:264) 
    at ConnectMSSQLServer.dbConnect(ConnectMSSQLServer.java:16) 
    at ConnectMSSQLServer.main(ConnectMSSQLServer.java:33) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) 


Process finished with exit code 0 

Ich bin neu in Java, könnte mir jemand in die richtige Richtung zeigen? Ich weiß nicht, wie man einen Klassenpfad einstellt, ist das nötig? Warum muss ich das überhaupt tun?

Answer 1

Ich habe es zur Arbeit. Ich muss die JAR-Dateien für eine JDBC-Verbindung von der Microsoft-Website herunterladen und sie dann meinem Projekt hinzufügen.