我过去遇到过类似的问题.假设您的MySQL服务器在同一盒上运行，则应尝试将localhost更改为127.0.0.1.

I have encountered similiar issues in the past. You should try changing localhost to 127.0.0.1, assuming your MySQL server is running on the same box.

我的信念是，您遇到的问题是"localhost"使用UNIX套接字，并且无法在标准目录中找到数据库.但是，"127.0.0.1"使用TCP，这实际上意味着它通过计算机上的本地Internet"运行，比UNIX套接字要可靠得多.

My belief is that the issue that you are encountering is that "localhost" uses a UNIX socket and can not find the database in the standard directory. However "127.0.0.1" uses TCP , which essentially means it runs through the "local internet" on the machine, being much more reliable than a UNIX socket.