org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'newsu'@'localhost' (using password: YES))
你这个应该是没有设置localhost用户的密码
设置方式为GRANT ALL PRIVILEGES ON newsu.* TO 'xx'@'%' IDENTIFIED BY 'xx' WITH GRANT OPTION;
如果dbcp觉得复杂的话，可以用我写的jdbc，简单、易用
https://gitee.com/yydf/easy-jdbc