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 */
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。