useUnicode=true&characterEncoding=utf-8&autoReconnect=true&useSSL=false&serverTimezone=UTC 后来百度了一下,发现数据库连接驱动的版本要与mysql的版本相同,例如我的mysql和连接驱动都需要时8.x
5. 把spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver 的CJ去掉 spring.datasource.driver-class-name=com.mysql.jdbc.Driver 成功解决
【mysql】【springboot】启动报错Could not create connection to database server. Attempted reconnect 3 times. Giving up 原因是少了时区,加&serverTimezone=UTC jdbc:mysql://127.0.0.1:3306/my_test?useUnicode=true&characterEncoding=utf-8&autoReconnect=true&useSSL=false&serverTimezone=UTC 参考文章:...
Error querying database. Cause: java.sql.SQLSyntaxErrorException:"\n### Error querying database. Cause: java.sql.SQLSyntaxErrorException: Expression #24 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'investment.ec.elected_admin_id' which is not functionally dependent ...
解决方案:Sringboot项目中的pom.xml排除logback,如果项目中有spring-boot-start-logging的依赖 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-logging</artifactId> <exclusions> <exclusion> <groupId>org.slf4j</groupId> ...
在SpringBoot项目中,如果你遇到了“Failed to configure a DataSource: ‘url‘ attribute is not specified and no embedded database available”这样的启动报错,那么很可能是因为在配置数据源时出现了问题。这个问题通常出现在尝试连接数据库但未正确配置相关属性时。让我们一起来解决这个问题。错误原因分析:这个错误...
Spring Boot 3.0 has upgraded to new versions of both Jedis and Lettuce. Which one are you using? @wilkinsonaConnecting to Redis on one's own computer is sufficient, but connecting to external Redis, i.e. Redis not on one's own computer, is not sufficient ...
java.sql.SQLSyntaxErrorException: Unknown database 'springboot' ERROR o.a.c.c.C.[Tomcat].[localhost].[/].[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatis...
在启动项上面的@SpringBootApplication注解改为: @SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})再次运行。 该注解的作用是,排除自动注入数据源的配置(取消数据库配置),一般使用在客户端(消费者)服务中. 其他解决办法还说用: @EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class}...
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)//排除自动配置 今天遇到一个问题,新建了一个Springboot项目启动报错If you want an embedded database (H2, HSQL or Derby), please put ...