mysql安装的是:8.0.23,启动项目后发现报错连接不上数据库 报错信息: Druid-ConnectionPool-Create-150783284] ERROR DruidDataSource - create connection SQLException, url: jdbc:mysql://localhost:3306/carefree?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&use…

完整配置在这里, https://www.cnblogs.com/sxdcgaq8080/p/10070948.html 启动报错如下: 2018-12-05 01:04:05.569 ERROR 1 --- [reate-259219561] com.alibaba.druid.pool.DruidDataSource : create connection SQLException, url: jdbc:mysql://mysql:33061/swapping?useSSL=false&us…

ERROR 14856 --- [reate-882003853] com.alibaba.druid.pool.DruidDataSource : create connection error, url: jdbc:mysql://localhost:3306/xhb?useUnicode=true&characterEncoding=UTF-8, errorCode 1045, state 28000 java.sql.SQLException: Access denied for use…

摘要:关于MySQL 与Django版本匹配相关知识的经验分享. run: (env) E:\PythonPro\PyDjangoProDemo011\xuanyuaniotpro>python manage.py migrate 报错代码提示如下: raise errorclass(errno, errval) django.db.utils.ProgrammingError: (, "You have an error in your SQL syntax; check the man…

很长时间没写后台代码有点生疏了,这不今天又出点小插曲,写个文章记录下. 由于要上传点数据到后台,顺手整了个mybatis+springmvc.在保存数据时出现了异常. Creating a new SqlSession SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@71670c91] was not registered for synchronization because synchronization is…

今天编写了一个Java项目,对数据库Mysql的表进行增删改查,然后遇到了这个问题 严重: create connection SQLException, url: jdbc:mysql://localhost:3306/springdb, errorCode 1045, state 28000java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES) at com.mysql.cj…

今天把ubuntu升级到16.04后,使用mysql connector 1.1.8版本(centos 还是ubuntu不清楚)访问数据库,出现莫名其妙的错误. 后来下载mysql connector 1.1.8 ubuntu 16.04 版本后,问题解决.…

idea项目一启动就报错: 20:01:13,047 ERROR DruidDataSource:1846 - create connection error com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver ha…

错误原因: 配置文件中 username 与 Mysql 关键字冲突 改为:…

本地安装mysql 是8 项目中数据驱动 也要求是 8 <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.16</version> <scope>runtime</scope></dependency> 配置中的驱动类也需要设置成最新的 设置中可…