如何将JAVA连接到SQL Server 2012？

Question

Hey friends I am totally new in JAVA and i want to now how to connect JDBC with SQL Server 2012. I go through so much material but i didn't get it. So can you give me a sample demo code...

I have one more problem that i installed SQL Server 2012 but i don't know what is username, password and server name. SO what can i do for it??

When i code it gives error...

Code:

import java.sql.*;
public class Conection
{
    public static void main(String a[]) throws ClassNotFoundException, SQLException
    {
        try
        {
            String url = "jdbc:sqlserver://localhost:1433//SQLEXPRESS;databaseName=mydb";   
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            Connection conn = DriverManager.getConnection(url);
            System.out.println("connection created");
            Statement st=conn.createStatement();
            String sql="select * from mydb";
            ResultSet rs=st.executeQuery(sql);
            while(rs.next())
            {
                System.out.println("Name: "+rs.getString(1));
                //System.out.println("Address : "+rs.getString(2));
            }
            if(st!=null)
            st.close();
            if(conn!=null)
                conn.close();
        }
        catch(SQLException sqle)
        {
            System.out.println("Sql exception "+sqle);
        }
    }
}

Error

Exception in thread "main" java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at Conection.main(Conection.java:11)

Answer 1

It seems your sql driver classes is not in classpath. if your are using an IDE add it to classpath else add it manually before compiling your class.