Load AD users to SQL Server table

//sqljdbc42.jar in classpath
//Read AD pattern from properties file
String sPropFileLine = null;
BufferedReader oBufReader = null;
String[] GroupArr = null;
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
String connectionURL = "jdbc:sqlserver://Server1\\Staging;databaseName=DB1";
String login = "user1";
String password = "password";
String tableName = "AD_USER";

try {
    //load driver here
    Class.forName(driverName);

    //use jdbc url, database login, and database password to create connection
    java.sql.Connection conn = java.sql.DriverManager.getConnection(connectionURL, login, password);
    java.sql.Statement stmt = conn.createStatement();
    String dbQuery = null;
    dbQuery = "TRUNCATE TABLE " + tableName; //delete all data from table
    stmt.executeUpdate (dbQuery);
    oBufReader = new BufferedReader(new FileReader("C:/CMfiles/AdTest.properties"));

    while ((sPropFileLine = oBufReader.readLine()) != null) {
        GroupArr = sPropFileLine.split(";");

        //Read AD users by group name
        StringBuffer sADAllUsers = new StringBuffer();
        sADAllUsers.append("cmd /c dsget group \"CN="+GroupArr[0]+",OU=Resource Access,OU=Groups,OU=Enterprise,DC=google,DC=co,DC=uk\" -members | dsget user -dn");
        Process procReadADUsers = Runtime.getRuntime().exec(sADAllUsers.toString());
        BufferedReader brInputReadADUsers = new BufferedReader(new InputStreamReader(procReadADUsers.getInputStream()));
        BufferedReader brErrorReadADUsers = new BufferedReader(new InputStreamReader(procReadADUsers.getErrorStream()));
        String sReadADUserErrors = null;
        String sReadADUser = brInputReadADUsers.readLine();
        String unprocessedUserDN = brInputReadADUsers.readLine();

        while (unprocessedUserDN!= null) {
            if((! unprocessedUserDN.equals("dsget succeeded"))) {
                sReadADUser =(unprocessedUserDN.substring((int)unprocessedUserDN.indexOf('=')+1,(int)unprocessedUserDN.indexOf(','))).trim().toLowerCase();
                //execute sql query
                dbQuery = "INSERT INTO " + tableName + " VALUES ('"+ sReadADUser + "');";
                printOut(dbQuery);
                stmt.executeUpdate (dbQuery);
            }
            unprocessedUserDN = brInputReadADUsers.readLine();
        }

        while ((sReadADUserErrors = brErrorReadADUsers.readLine()) != null) {
            printOut("Error reading members of AD group "+GroupArr[0]+": "+sReadADUserErrors);
        }

        int exitValue = procReadADUsers.waitFor();
        printOut("Exit Status: "+exitValue);
        sADAllUsers.delete(0,sADAllUsers.length());
    }
} catch (Exception e) {
    printErr(e.getLocalizedMessage());
}