spring boot jdbc mysql连接
cc& 人气:31.创建文件,勾选JDBC和mysql
pom.xml中添加了mysql驱动包和jdbc启动器
2.application.yml添加数据库的配置
spring: datasource: username: root password: 123456 # 针对mysql8版本以上的驱动包,需要指定时区 url: jdbc:mysql://127.0.0.1:3306/jdbc?serverTimezong=GMT%2B8 # 针对mysql8版本以上的驱动包,需要指定新的驱动类 driver-class-name: com.mysql.cj.jdbc.Driver
mysql 8.x版本驱动包,要使用 com.mysql.cj.jdbc.Driver 作为驱动类
3.测试类中进行测试
package com.cc.springboot; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import javax.sql.DataSource; import java.sql.Connection; import java.sql.SQLException; @SpringBootTest class Springboot08DataJdbcApplicationTests { @Autowired DataSource dataSource; @Test void contextLoads() throws SQLException { System.out.println("dataSource:"+dataSource.getClass()); Connection connection = dataSource.getConnection(); System.out.println(connection); connection.close(); } }
运行结果:
SpringBoot 默认采用的数据源连接池是:com.zaxxer.hikari.HikariDataSource
数据源相关配置都在 DataSourceProperties 中;
常见错误
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
说明mysql服务器没有启动,需要启动mysql服务, 你用navicat连接试试看是否可以连接,不可以说明 没有启动 ;
The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one
时区异常:需要配置文件中指定时区: jdbc:mysql://127.0.0.1:3306/jdbc?serverTimezone=GMT%2B8
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