如果数据库的密码是1234,下面这个就通不过
driverClassName = com.mysql.jdbc.Driver
url = jdbc:mysql:///web_test3
username = root
password = 1234
原因就是password的value值后面后空格,下面这个就能通过
driverClassName = com.mysql.jdbc.Driver
url = jdbc:mysql:///web_test3
username = root
password = 1234