简单的数据库连接

package Demo;

/**

 * <p>Title: </p>

 * <p>Description: </p>

 * <p>Copyright: Copyright (c) 2005</p>

 * <p>Company: </p>

 * @author not attributable

 * @version 1.0

 */

import java.sql.*;

public class printData {

  public printData() {

  }

  public static void main(String[] args) {

    Connection con;

    Statement sql;

    ResultSet rs;

    try{

      try {

        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

      }

      catch (ClassNotFoundException ex1) {

        ex1.printStackTrace();

      }

      con = DriverManager.getConnection("jdbc:odbc:test","sa","");

      sql = con.createStatement();

      rs = sql.executeQuery("select top 10 * from customers");

      while (rs.next()){

        System.out.print(rs.getString("CustomerID"));

        System.out.println();

      }

      con.close();

    }

    catch(SQLException ex){

      ex.printStackTrace();

    }

  }

}

注:

如果不加上Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

则会提示出错

java.sql.SQLException: No suitable driver

 at java.sql.DriverManager.getConnection(DriverManager.java:532)

 at java.sql.DriverManager.getConnection(DriverManager.java:171)

 at Demo.printData.main(printData.java:21)

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");  //加上这一句

String url = "jdbc:odbc:student";

Connection conn = DriverManager.getConnection(url,"","");

连接前先注册驱动程序