connections.java

这是一个mvc模式

package jsp.tags.dapact.samples;

import java.sql.*;
import jsp.tags.dapact.conf.UserClassFactory;
/**
 * Title:        Data Aware Processing And Control Tags
 * Description:  Tag library for the processing and controlling the input and output of data.
 * Copyright:    LGPL (http://www.gnu.org/copyleft/lesser.html)
 * Compile Date: @compile_date@
 * @author Allen M Servedio
 * @amp_sign@version @VERSION@
 */

/**
 * Modify this class to produce connections for your database.
 */
public class Connections
{
  // This loads the database driver which will register itself with the DriverManager.
  static
  {
    try
    {
      Class.forName("@DATABASE_DRIVER@");
    }
    catch (ClassNotFoundException e)
    {
      UserClassFactory.getLogger().log("Could not find the database driver class.", e);
    }
  }

  /**
   * Default constructor (not really needed...).
   */
  private Connections()
  {
  }

  /**
   * @return Retrieve a connection - hard codes the URL, name and password.
   */
  public static final Connection getConnection() throws SQLException
  {
    return DriverManager.getConnection("@DATABASE_URL@", "@DATABASE_USER_NAME@", "@DATABASE_USER_PASSWORD@");
  }

  /**
   * @param conn the connection to release.
   */
  public static final void releaseConnection(Connection conn) throws SQLException
  {
    if (conn != null)
    {
      conn.close();
    }
  }
}