5.SQLServer DataSource and SingleTon：（視頻下載） （全部書籍）
import net.sourceforge.jtds.jdbcx.*;
import java.sql.*;
import javax.sql.*;
public class SqlserverSingletonDataSource {
static private JtdsDataSource ds;
private Connection con;
private SqlserverSingletonDataSource() {

try {
ds = new JtdsDataSource();
ds.setServerName("localhost");
ds.setDatabaseName("pubs");
ds.setUser("sa");
ds.setPassword("");
}
catch (Exception e) {
}
}

public static Connection getConnection() throws Exception {
if (ds == null) {
new SqlserverSingletonDataSource();
}
Connection con =null;
try {

詳情請見：

http://www.mark-to-win.com/index.html?content=JavaBeginner/javaUrl.html&chapter=JavaBeginner/JavaBeginner10_web.html#SQLServerDataSourceandSingleTon

給出一個SQLServer DataSource 數據源單態模式的例子？