Java DB Connection Manager最佳实践

Question

I have a connection manager code as follows:

public class ConnectionManager {

    private final String driverName = "com.mysql.jdbc.Driver";
    private final String connectionUrl = "jdbc:mysql://localhost:3306/student";
    private final String userName = "root";
    private final String userPass = "root";

    private Connection con = null;

    public ConnectionManager() {
        try {
            Class.forName(driverName);
        } catch (ClassNotFoundException e) {
            System.out.println(e.toString());
        }
    }

    public Connection createConnection() {
        try {
            con = DriverManager.getConnection(connectionUrl, userName, userPass);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return con;
    }

    public void closeConnection() {
        try {
            this.con.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

}

How can I improve this? I am thinking the following improvement:

1. ) create a connection.properties. What is the best way to implement this? Should I put it the call of the property file on a singleton?
2. ) Make the connection singleton.

Thank you.

Answer 1

如果是用于实际应用程序，则最好使用像http://commons.apache.org/proper/commons-dbcp/这样的连接池。