1.原生态连接

①：准备工作：引入mysql依赖：

mysqlmysql-connector-java5.1.6

②：书写DBUtil工具类：全代码

import java.sql.*;​public class DBUtil { public static final String username="root";//连接数据库的用户名 public static final String password="***";//连接数据库的密码 public static final String url="jdbc:mysql://localhost:3306/db02?useSSL=false&serverTimezone=UTC&characterEncoding=utf-8";//url的路径 public static Connection getCon() throws SQLException { try { Class.forName("com.mysql.jdbc.Driver"); } catch (ClassNotFoundException e) { e.printStackTrace(); } return DriverManager.getConnection(url,username,password); } public static Statement getStatement(Connection connection) throws SQLException { return connection.createStatement(); } public static ResultSet getResultSet(Statement statement,String sql) throws SQLException { return statement.executeQuery(sql); }}​

③：连接数据库的四大步骤

1>:加载驱动

2>:获取连接

 public static Connection getCon() throws SQLException {try {Class.forName("com.mysql.jdbc.Driver");//1.加载驱动 } catch (ClassNotFoundException e) {e.printStackTrace(); }return DriverManager.getConnection(url,username,password);//2.获取连接 }

3>:通过你的连接来获取操作数据库的statement对象

public static Statement getStatement(Connection connection) throws SQLException {return connection.createStatement();//注：prepareStatement（）可以防止SQL注入问题 }

4>:执行sql语句，获取结果集

public static ResultSet getResultSet(Statement statement,String sql) throws SQLException {return statement.executeQuery(sql); }

④：代码测试

1>:数据库表的设计：

user表：

2>:在SpringBoot的测试单元经行测试

@SpringBootTestclass MysqlApplicationTests {​@Testvoid contextLoads() throws SQLException {Connection connection = DBUtil.getCon();//驱动加载和连接Statement statement = DBUtil.getStatement(connection);//得到statement对象ResultSet resultSet = DBUtil.getResultSet(statement, "select * from db02.user");//执行CRUD的sql语句得到结果集if(resultSet!=null){while (resultSet.next()){//遍历结果集，打印查询结果String id = resultSet.getString(1);String username=resultSet.getString(2);String password=resultSet.getString(3);String email = resultSet.getString(4);String sex = resultSet.getString(5);String age = resultSet.getString(6);System.out.println(id+" "+username+" "+password+" "+email+" "+sex+" "+age);System.out.println("==============="); } } }​}

3>:测试结果

2.在yml或则properties文件里，直接配置

以yml文件为例：

spring: datasource:url: jdbc:mysql://localhost:3306/db02?ServerTimezone=UTCusername: root password: ***driver-class-name: com.mysql.cj.jdbc.Driver

3.总结

以上就是关于自己总结的连接mysql数据库的两种方法，实际的操作也不难，希望可以帮助到大家！