学习记录：复习

JDBC简单链接数据库

/**    关闭资源用		*/
		Connection conn = null;
		Statement stmt = null;
		ResultSet rest = null;
		/**		设置url,user,password,sql		*/
		String url = "jdbc:mysql://localhost:3306/kevin?useUnicode=true&characterEncoding=utf-8";
		String user = "root";
		String password = "123456";
		String sql = "select * from blog";
		try
		{
			// 注册驱动
			Class.forName("com.mysql.jdbc.Driver");
			// 获得数据库链接
			conn = DriverManager.getConnection(url, user, password);
			// 获得Statement
			stmt = conn.createStatement();
			rest = stmt.executeQuery(sql);
			while (rest.next())
			{
				System.out.println(rest.getString("title") + "_" + rest.getString("viceTitle"));
			}
		} catch (Exception e)
		{
			System.err.println("发生异常："+e);
		} finally
		{//关闭资源
			rest.close();
			stmt.close();
			conn.close();
		}

关闭资源放在finally中

需引入mysql-connector-java-***.jar，如果没有使用maven可在官网下载或 我的网盘