数据库驱动问题

[slowlyのformat]

这是什么情况

[小灯光环]

public static void main(String[] args) {
	try {
		Class.forName(POSTGRESQL_DRIVER).newInstance();
		String url = POSTGRESQL_URL;
		Connection con = DriverManager.getConnection(url, "postgres", "111111");
		Statement st = con.createStatement();
		String sql = " select * from t_student";
		ResultSet rs = st.executeQuery(sql);
		ResultSetMetaData rsmd = rs.getMetaData();
		int columnCount = rsmd.getColumnCount();
		while (rs.next()) {
			for (int i = 1; i <= columnCount; i++) {
				System.out.print(rs.getString(i) + "\t");
			}
			System.out.println();
		}
		rs.close();
		st.close();
		con.close();

	} catch (Exception e) {
		e.printStackTrace();
	}
}

[ynfumingzheng]

要异常，public static void main(String[] args) { try { Class.forName(POSTGRESQL_DRIVER).newInstance(); String url = POSTGRESQL_URL; Connection con = DriverManager.getConnection(url, "postgres", "111111"); Statement st = con.createStatement(); String sql = " select * from t_student"; ResultSet rs = st.executeQuery(sql); ResultSetMetaData rsmd = rs.getMetaData(); int columnCount = rsmd.getColumnCount(); while (rs.next()) { for (int i = 1; i <= columnCount; i++) { System.out.print(rs.getString(i) + "\t"); } System.out.println(); } rs.close(); st.close(); con.close(); } catch (Exception e) { e.printStackTrace(); } }

[小七和十一的爸爸]

楼主这样写 Class.forName("com.mysql.jdbc.Driver");

[尼古拉斯-全蛋]

写到方法里边

[逸花城]

你们都是用的哪个版本的mysql？为什么我的是org.gjt.mm.mysql.Driver

[肃穆丶]

在方法里面写Class.forName("com.mysql.jdbc.Driver");