JDBC connect successful!
java.sql.SQLException: Unable to get information from SQL Server: localhost.
    at net.sourceforge.jtds.jdbc.MSSqlServerInfo.<init>(MSSqlServerInfo.java:97)
    at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:276)
    at net.sourceforge.jtds.jdbc.ConnectionJDBC3.<init>(ConnectionJDBC3.java:50)
    at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
    at java.sql.DriverManager.getConnection(DriverManager.java:582)
    at java.sql.DriverManager.getConnection(DriverManager.java:185)
    at com.jdbc.Test.JTDS(Test.java:51)
    at com.jdbc.Test.<init>(Test.java:18)
    at com.jdbc.Test.main(Test.java:13)

package com.jdbc;

import java.sql.Connection;

public class Test{

    /**
     * @param args
     */
    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        JDBC();
        JTDS();
    }

    private void JDBC() {
        Connection conn = null;
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            String url = "jdbc:sqlserver://localhost:1243;DatabaseName=test;instance=test1";
            conn = DriverManager.getConnection(url, "test", "test");
            if (conn != null) {
                System.out.println("JDBC connect successful!");
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    private void JTDS() {
        Connection conn = null;
        try {
            Class.forName("net.sourceforge.jtds.jdbc.Driver");
            DriverManager.registerDriver(new net.sourceforge.jtds.jdbc.Driver());
            String url = "jdbc:jtds:sqlserver://localhost:1243;DatabaseName=test;instance=test1";
            conn = DriverManager.getConnection(url, "test", "test");
            if (conn != null) {
                System.out.println("JTDS connect successful!");
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}