mysql 創建連接是 Cannot create PoolableConnectionFactory (Unknown character set: 'utf8mb4')

 Cannot create PoolableConnectionFactory (Unknown character set: 'utf8mb4')

maven 依賴換版本

   
   
   
           

    
    
    
            
 <dependency>
    
    
    
            
 <groupId>mysql</groupId>
    
    
    
            
 <artifactId>mysql-connector-java</artifactId>
    
    
    
            
 <version>5.1.6</version>
    
    
    
            
 </dependency>