在java的應用中,我們經常會對數據庫進行必要的操作,下來我們就了解一下如何用java連接mysql數據庫 以及java連接sql server數據庫
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 { //加載jdbc驅動程序 Class.forName("com.mysql.jdbc.Driver"); //指明主機名(默認為:127.0.0.1)和端口號(默認為:3306)以及數據庫名(必須指定) String url = "jdbc:mysql://localhost:3306/test1"; //與數據庫建立連接 connection = DriverManager.getConnection(url, "root", "123456"); //創建一個Statement對象將SQL語句發送到數據庫 statement = connection.createStatement(); //將查詢結果返回給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中的輸出結果 *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.登陸表 "); while(rs.next()){ System.out.println("用戶名:" + rs.getString(1) + " 密碼:" + 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中的輸出結果 * 用戶名:張三 密碼:123456 *用戶名:李四 密碼:111111 *用戶名:王五 密碼:123654 *用戶名:王延暾 密碼:0123456789 *用戶名:曾安新 密碼:123456 */
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持。