Question

java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver

Asked by: LuckyLucks

Hi eee:
I get the below error:

java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
        at java.net.URLClassLoader.findClass(URLClassLoader.java:241)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:516)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:460)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:448)
        at java.lang.Class.forName1(Native Method)
        at java.lang.Class.forName(Class.java:142)
        at ExportFromMSSQL.main(ExportFromMSSQL.java:15)

The steps I have taken to set up my env are as folliws:
1. Add the javac and the sqljdbc.jar to my environment as follows:
PATH=/home/asmith:/home/asmith/perl/:/usr/ucb:$HOME/bin:/usr/bin/X11:/
sbin:/usr/java131/jre/bin:/usr/java131/bin:/myhome/asmith/JDBC/sqljdbc_2.0/enu/sqljdbc.jar:.

Where things reside:
1. My javac resides in usr/java131/bin
2. Downloaded and installed the MS driver (http://www.microsoft.com/downloads/details.aspx?FamilyId=F914793A-6FB4-475F-9537-B8FCB776BEFD&displaylang=en) into JDBC subdir. Now the dir structure looks like below
/myhome/asmith/JDBC/sqljdbc_2.0/enu > ls -l
total 1720
drwxr-s---   5 asmith  mygrp           512 Dec 02 13:54 auth
drwxr-s---   5 asmith  mygrp           512 Dec 02 13:54 help
-rw-r-----   1 asmith   mygrp          1675 Jul 14 14:47 install.txt
-rw-r-----   1 asmith   mygrp        13986 Jul 14 14:47 license.txt
-rw-r-----   1 asmith   mygrp        11172 Jul 14 14:44 release.txt
-rw-r-----   1 asmith   mygrp        409322 Jul 18 11:29 sqljdbc.jar
-rw-r-----   1 asmith   mygrp        422699 Jul 21 11:50 sqljdbc4.jar
drwxr-s---   5 asmith   mygrp        512 Dec 02 13:54 xa

I run as
/myhome/asmith/JDBC/sqljdbc_2.0/enu/help/samples/connections > javac connectURL.java
/myhome/asmith/JDBC/sqljdbc_2.0/enu/help/samples/connections > java connectURL
java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
        at java.net.URLClassLoader.findClass(URLClassLoader.java:241)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:516)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:460)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:448)
        at java.lang.Class.forName1(Native Method)
        at java.lang.Class.forName(Class.java:142)
        at connectURL.main(connectURL.java:43)


My code is the sample code provided in connectURL.java i.e below:









import java.sql.*;
 
public class connectURL {
 
        public static void main(String[] args) {
 
                // Create a variable for the connection string.
                String connectionUrl = "jdbc:sqlserver://localhost:1433;" +
                        "databaseName=AdventureWorks;integratedSecurity=true;";
 
                // Declare the JDBC objects.
                Connection con = null;
                Statement stmt = null;
                ResultSet rs = null;
 
                try {
                        // Establish the connection.
                        Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
                        con = DriverManager.getConnection(connectionUrl);
 
                        // Create and execute an SQL statement that returns some data.
                        String SQL = "SELECT TOP 10 * FROM Person.Contact";
                        stmt = con.createStatement();
                        rs = stmt.executeQuery(SQL);
 
                        // Iterate through the data in the result set and display it.
                        while (rs.next()) {
                                System.out.println(rs.getString(4) + " " + rs.getString(6));
                        }
                }
 
                // Handle any errors that may have occurred.
                catch (Exception e) {
                        e.printStackTrace();
                }
 
                finally {
                        if (rs != null) try { rs.close(); } catch(Exception e) {}
                        if (stmt != null) try { stmt.close(); } catch(Exception e) {}
                        if (con != null) try { con.close(); } catch(Exception e) {}
                }
        }
}

                                  
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Asked On
2008-12-03 at 12:32:08ID23954610
Topic

New to Java Programming

Participating Experts
1
Points
500
Comments
8

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Answers

 

by: objectsPosted on 2008-12-03 at 13:32:16ID: 23090467

you need to add the location of the jar to your CLASSPATH environment variable, *not* your PATH

 

by: LuckyLucksPosted on 2008-12-03 at 13:59:19ID: 23090722

ok heres the change:
1. I have removed the entry in PATH so that PATH now looks like :-
PATH=/home/asmith:/home/asmith/perl/:/usr/ucb:$HOME/bin:/usr/bin/X11:/
sbin:/usr/java131/jre/bin:/usr/java131/bin:.

2. I run as
/myhome/asmith/JDBC/sqljdbc_2.0/enu/help/samples/connections > javac -classpath /myhome/asmith/JDBC/sqljdbc_2.0/enu/sqljdbc.jar connectURL.java
/myhome/asmith/JDBC/sqljdbc_2.0/enu/help/samples/connections > java -classpath /myhome/asmith/JDBC/sqljdbc_2.0/enu/sqljdbc.jar connectURL

But I get the error
Exception in thread "main" java.lang.NoClassDefFoundError: connectURL

 

by: objectsPosted on 2008-12-03 at 14:02:24ID: 23090754

you need to also include the location of your (connectUrl) class in the classpath


 

by: LuckyLucksPosted on 2008-12-03 at 18:01:57ID: 23092132

connectURL is a program complied in its subdir by javac compiler, why to include it in classpath?

 

by: objectsPosted on 2008-12-03 at 18:06:40ID: 23092147

so it can be found, the classpath is used to find all classes


try:

 java -classpath /myhome/asmith/JDBC/sqljdbc_2.0/enu/sqljdbc.jar:. connectURL

 

by: LuckyLucksPosted on 2008-12-04 at 07:54:04ID: 23096375

doesnt work, same error

 

by: LuckyLucksPosted on 2008-12-04 at 08:11:13ID: 23096579

ok sorry that seemed to have solved that error,many thx,  but gives me another one:


Exception in thread "main" java.lang.UnsupportedClassVersionError: com/microsoft/sqlserver/jdbc/SQLServerDriver (Unsupported major.minor version 49.0)
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:703)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:133)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:320)
        at java.net.URLClassLoader.access$400(URLClassLoader.java:93)
        at java.net.URLClassLoader$ClassFinder.run(URLClassLoader.java:678)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:239)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:516)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:460)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:448)
        at java.lang.Class.forName1(Native Method)
        at java.lang.Class.forName(Class.java:142)
        at ExportFromMSSQL.main(ExportFromMSSQL.java:15)

 

by: objectsPosted on 2008-12-04 at 12:51:20ID: 23099295

your running an older version of java than the jar was built with.
you need to upgrade java, or downgrade your driver

20120131-EE-VQP-002

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