In the actual combat of Java Web project, we encounter the following problems: 
This is actually due to the low version of your MySQL driver package https://mvnrepository.com/artifact/mysql
Download the high version of MySQL driver package and put it in lib.
Read More:
- java.lang.ClassNotFoundException : com.mysql.jdbc . driver project cannot connect to database, exception, lack of MySQL driver
- java.lang.AbstractMethodError: Receiver class com.alibaba.cloud.sentinel.feign.SentinelContractHolde
- java.lang.NoSuchMethodError Quote: javax.servlet.com Yeah. HttpServletRequest.isAsyncStarted ()Z
- solve com.mysql.jdbc . exceptions.jdbc4 .MySQLSyntaxErrorException:
- Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure (How to Fix)
- When executing hive – f script com.mysql.jdbc . exceptions.jdbc4 .CommunicationsException: Communications link failure
- Loading class `com.mysql.jdbc.Driver‘. This is deprecated. The new driver class is `com.mysql.cj.jdb
- How to Fix Exception in thread “main“ com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
- Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communicat
- Analysis of JDBC connection to MySQL
- JDBC connection to Oracle: listener used the connection with the following error: ora-12505
- Error in idea compilation: java.lang.OutOfMemoryError Java heap space and java.lang.StackOverflowError
- [unity] Android package error java.lang.ClassNotFoundException Did not find class com.unity3d . player.MainActivity
- Caused by: java.lang.ClassNotFoundException: com.alibaba.nacos.api.naming.NamingMaintainService
- java.lang.Throwable: Substituted for the exception com.bea.xml.SchemaTypeLoaderException which lack
- java.lang.NoSuchMethodError: org.json.JSONObject.put(Java/lang/String; Java/util/Collection;) “209151;”
- MySQL local connection Error 1130_ The solution of MySQL 1130 error report when remote connection through Navicat for MySQL
- Meven report error java.lang.NoSuchMethodError : com.google.common . base.Preconditions.checkArgument
- Method threw ‘java.lang.NullPointerException‘ exception. Cannot evaluate com.sun.proxy.xxx
- Cause: java.sql.SQLException: Error setting driver on UnpooledDataSource. Cause: java.lang.ClassNot