一.導入jar包java
1.下載jar包:https://dev.mysql.com/downloads/mysql
2.導入sql
在項目文件夾下新建一個名爲lib的文件夾數據庫
將下載好的jar包放入lib文件夾,而後右擊lib文件夾,選擇Add as Library...,而後點擊okurl
二.代碼部分spa
1.加載驅動3d
Class.forName("com.mysql.cj.jdbc.Driver");code
2.用戶信息和urlserver
String url = "jdbc:mysql://localhost:3306/數據庫名?&useSSL=false&serverTimezone=UTC";對象
3.數據庫對象Connection
Connection connection = DriverManager.getConnection(url,username,password);
4.執行數據庫對象connection
Statement statement = connection.createStatement();
代碼展現
package com.lofun.fuxi.JDBC; import java.sql.*; public class jdbc_used { public static void main(String[] args) throws ClassNotFoundException, SQLException { //1.加載驅動 Class.forName("com.mysql.cj.jdbc.Driver"); System.out.println( "加載驅動成功!" ); //2.用戶信息和url String url = "jdbc:mysql://localhost:3306/練習?&useSSL=false&serverTimezone=UTC"; String username = "root"; //數據庫用戶名 String password = "123456";//數據庫密碼 //3.鏈接成功,數據庫對象Connection表明數據庫 Connection connection = DriverManager.getConnection(url,username,password); //4.執行SQL的對象Statement Statement statement = connection.createStatement(); String sql = "SELECT * FROM students"; ResultSet resultSet_01 = statement.executeQuery(sql);//查詢的結果集,封裝了全部的查詢結果 statement.executeQuery()執行sql語句 while(resultSet_01.next()){ System.out.println(resultSet_01 .getObject("name"));//resultSet_01 .getObject獲取指定的數據類型 } //關閉 resultSet_01.close(); statement.close(); connection.close(); } }