initservlet.java

学生信息管理系统

package bbs.bean;

import java.sql.DriverManager;
import java.sql.SQLException;

import javax.servlet.http.HttpServlet;

public class InitServlet extends HttpServlet
{
	public void init()
	{
		// --
		System.out.println("系统准备启动");

		// 先休眠一会，等待容器完全启动
		try
		{
			Thread.sleep(5 * 1000);
		}
		catch (Exception e)
		{
		}

		try
		{
			// 启动Derby嵌入式数据库引擎
			Class.forName("org.apache.derby.jdbc.EmbeddedDriver").newInstance();

			// --
			System.out.println("驱动加载成功, Derby启动");
		}
		catch (Exception e)
		{
			System.out.println("Derby启动异常");
			e.printStackTrace();

			throw new RuntimeException("服务启动失败");
		}
	}

	public void destory()
	{
		try
		{
			// 关闭Derby
			DriverManager.getConnection("jdbc:derby:;shutdown=true");
		}
		catch (SQLException e)
		{
			// --
			System.out.println("Derby关闭异常");
			e.printStackTrace();
		}
	}
}