JDBC连接SQL Server

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public class Main {
    public static void main(String[] args) throws SQLException {
        Connection conn = getConnection();
        assert conn != null;
        Statement stmt = conn.createStatement();
        ResultSet rs = stmt.executeQuery("select count(*) from dbo.tb_realtime");
        while (rs.next()) {
            System.out.println(rs.getInt(1));
        }
    }
    
    public static Connection getConnection() {
        String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
        String url = "jdbc:sqlserver://localhost:1433;DatabaseName=some_database";
        String user = "sa";
        String password = "xxxxxx";
        Connection conn;
        try {
            Class.forName(driverName);
            conn = DriverManager.getConnection(url, user, password);
            return conn;
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
            return null;
        }
    }
}

新安装的SQL Server记得开启TCP/IP协议

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