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[mysql][问题记录]java.sql.SQLException: Unknown system variable 'query_cache_size'

问题： java.sql.SQLException: Unknown system variable 'query_cache_size' at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:545) ~[mysql-connector-java-6.0.6.jar:6.0.6] at com.mysql.cj.jdbc.exceptions.SQLError.createSQLExcept

java.sql.SQLException: Unable to load authentication plugin ‘caching_sha2_password‘.

错误描述 java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'. at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:923) at com.mysql.jdbc.Mysq

Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure问题解决

一、今日学习内容 ERROR [com.alibaba.druid.pool.DruidDataSource] - create connection error, url: jdbc:mysql://127.0.0.1:3306/db_local?serverTimezone=UTC&useSSL=false&autoReconnect=true, errorCode 0, state 08001 java.sql.SQLNonTransientConnectionException:

jdbc连接数据库问题解决

一、mysql-connector-java与mysql版本不相符 1、报错信息 com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.

Idea数据库引入异常：java.sql.SQLException: The server time zone value ‘Öйú±ê׼ʱ¼ä‘ is unrecognized

转载解决链接 java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a

SpringMVC_异常处理_SimpleMappingExceptionResolver

一、SimpleMappingExceptionResolver 如果希望对所有异常进行统一处理，可以使用 SimpleMappingExceptionResolver，它将异常类名映射为视图名，即发生异常时使用对应的视图报告异常 二、代码演示 a）Controller @GetMapping("/hello") public String hello() throws Exception {

mysql8报错解析

1. 场景描述 想把测试数据导一份到本地使用，乱入装了mysql8，使用springboot项目启动的时候报： java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDB

Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure

最近启动项目，连接自己本地数据库时，出现了如下异常 ERROR [com.alibaba.druid.pool.DruidDataSource] - create connection error, url: jdbc:mysql://127.0.0.1:3306/db_local?serverTimezone=UTC&useSSL=false&autoReconnect=true, errorCode 0, state 08001 java.sql.SQLNon

阿里云部署tomcat服务数据库连接异常

【环境】 使用的是阿里云，用的是docker 部署mysql的方式，将数据挂载在宿主机上面 关于docker部署mysql的方式这里不再记录 【问题描述】： Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully r

MyBatis| MyBatis 自动生成代码报错 java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger

在使用 MyBatis 的自动生成工具的时候,原本用得好好的工具突然用不了,运行的时候报除了类型匹配错误的异常java.lang.ClassCastException: java.math.BigInteger,仔细回想了环境的变化,也就是Mysql数据库的版本从原理的5.7换到了8.0的版本. java.sql.SQLException: java.lang.

WEB项目运行时，多次遇到 The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more

最近很多次遇到 The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone这个问题， java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zon

java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized...

java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc tim

Java spring boot 2.0连接mysql异常：The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or

java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc tim