java连接mysql数据库 java连接sql server数据库

import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;public class TestOne {  private static Connection connection;  private static Statement statement;  private static ResultSet result;  public static void main(String[] args) {    try {      //加载jdbc驱动程序      Class.forName("com.mysql.jdbc.Driver");      //指明主机名（默认为：127.0.0.1）和端口号（默认为：3306）以及数据库名（必须指定）      String url = "jdbc:mysql://localhost:3306/test1";      //与数据库建立连接      connection =  DriverManager.getConnection(url, "root", "123456");      //创建一个Statement对象将SQL语句发送到数据库      statement = connection.createStatement();      //将查询结果返回给result      result = statement.executeQuery("select *from user");      while(result.next()){        System.out.println("name:" + result.getString(1) + "      password:" + result.getString(2));      }      connection.close();      result.close();      statement.close();    } catch (ClassNotFoundException e) {      // TODO Auto-generated catch block      e.printStackTrace();    } catch (SQLException e) {      // TODO Auto-generated catch block      e.printStackTrace();    }finally{      try {        if(connection != null)          connection.close();        if(result != null)          result.close();        if(statement != null)          statement.close();      } catch (SQLException e) {        // TODO Auto-generated catch block        e.printStackTrace();      }    }  }}/** * mysql> select *from user; *+----------+----------+ *| name   | password | *+----------+----------+ *| lisi   | 123456  | *| wangwu  | 123456  | *| zhangsan | 123456  | *+----------+----------+ *3 rows in set (0.54 sec) * *在java中的输出结果 *name:lisi    password:123456 *name:wangwu    password:123456 *name:zhangsan    password:123456 */

import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;public class TestDemo {  public static void main(String[] args) {    String url="jdbc:sqlserver://localhost:1433;DatabaseName=Contellation";    Connection conn = null;    try {      Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");      conn = DriverManager.getConnection(url, "sa", "");      Statement statement=conn.createStatement();      ResultSet rs = statement.executeQuery("select * from dbo.登陆表 ");      while(rs.next()){        System.out.println("用户名：" + rs.getString(1) + "  密码：" + rs.getString(2));      }      conn.close();    } catch (ClassNotFoundException e) {      // TODO Auto-generated catch block      e.printStackTrace();    } catch (SQLException e) {      // TODO Auto-generated catch block      e.printStackTrace();    }   }}/** * java中的输出结果 * 用户名：张三  密码：123456 *用户名：李四  密码：111111 *用户名：王五  密码：123654 *用户名：王延暾  密码：0123456789 *用户名：曾安新 密码：123456 */