java连接mysql数据库 java连接sql server数据库

在java的应用中,我们经常会对数据库进行必要的操作,下来我们就了解一下如何用mysql" title="java连接mysql">java连接mysql数据库 以及java连接sql server数据库

一、mysql

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

*/

二、sql server

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

*/

以上是 java连接mysql数据库 java连接sql server数据库 的全部内容, 来源链接: utcz.com/z/319950.html

回到顶部