使用localhost和127.0.0.1都无法连接mysql

如果这个时候使用用主机名和::1能够连接的话，那可以确定是被ipv6坑了

因为IPv6协议将localhost和127.0.0.1都映射为::1

这个时候需要按照ipv6的地址进行连接

具体应看下面的说明：

Connecting To My Sql Server Using An Ipv6 Address

by Ashwani
Kumar - Oct 10th, 2012 - posted in Technical | Tagged
as ipv6, mysql | Comments

If you are one of those who does not know that there is a new way to connect to MySQL database with an IPV6 IP address, then keep reading. We will see how to connect to a mysql database on a server with an IPv6 address.

I struggled for this, so I wanted to document it. Source: Wiki
IPv6

Address Format

IPv6 addresses have two logical parts: a 64-bit network prefix, and a 64-bit host address part.

(The host address is often automatically generated from the interface MAC address.) An IPv6 address is represented by 8 groups of 16-bit hexadecimal values separated by colons (:) shown as follows:

A typical example of an IPv6 address is:

2001:0db8:85a3:0000:0000:8a2e:0370:7334.

The hexadecimal digits are case-insensitive.

Method to connect to MYSQL using an IPv4 address (traditional way)

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urlString = “jdbc:mysql://10.144.1.216:3306/dbName”; Class.forName(driver); DriverManager.setLoginTimeout(getConnectionTimeOut()); dbConnection = DriverManager.getConnection(urlString,user,password);

Method to connect to MYSQL using an IPv6 address (New way)

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urlString = “jdbc:mysql://address=(protocol=tcp)(host=fe80::5ed6:baff:fe14:a23e)(port=3306)/db”; Class.forName(driver); DriverManager.setLoginTimeout(getConnectionTimeOut()); dbConnection = DriverManager.getConnection(urlString,user,password);

This new approach is no where documented over the internet, and a bug has been filed by Mark Mathews to include this as documentation in next release of MYSQL JDBC connector. Thanks to Mark for Pointing this out to us.