Connecting to Google SQL with a simple Java progra

I have a simple Java program (not a web application/Google Engine/etc.). I went over every guide in Google Cloud SQL website, and I can't figure out how to connect to the server.

Right now I have

Class.forName("com.mysql.jdbc.Driver");

and

connection = DriverManager.getConnection("jdbc:mysql://x:3306/y?user=root");

Where x is IP address of the instance (taken from the properties of the instance) and y is simply the instance ID.

Am I doing something wrong? I also set a password for the root as one of the tutorials suggested. Should I specify it somewhere in the code?

Thanks.

EDIT

Following mohan rathour's link, I obtained Cloud SQL MySQL Socket Factory and my code now looks like:

Class.forName("com.mysql.jdbc.Driver");

and

String jdbcUrl = String.format("jdbc:mysql://google/%s?cloudSqlInstance=%s&"+"socketFactory=com.google.cloud.sql.mysql.SocketFactory",
                    "dbname",
                    "instanceConnectionName");

connection = DriverManager.getConnection(jdbcUrl, "userName", "password");

I get the following in my console:

INFO: Connecting to Cloud SQL instance [instanceName].
com.google.cloud.sql.mysql.SslSocketFactory getInstance
INFO: First Cloud SQL connection, generating RSA key pair.

But then I get this exception:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.

SOLUTION

No need to use "Cloud SQL MySQL Socket Factory".

In the Google SQL panel, go to your instance panel -> Access Control -> Authorization, add the following network address and click save.

0.0.0.0/0

Now you can connect with this code:

Class.forName("com.mysql.jdbc.Driver");
...
String url= String.format("jdbc:mysql://x:3306/y");
connection = DriverManager.getConnection(url, z, w);

Where x is your instance IP (get it from the panel), y is the instance name, z is the database (not account) user name (usually "root") and w is the user password (you have to set it. look at Google's tutorials).

回答1:

By default, Cloud SQL instances do not allow connections on the public IP. You must add individual subnets from which you would like to connect. You can see the full documentation here: https://cloud.google.com/sql/docs/external#appaccessIP

An alternative that does not require whitelisting IP addresses is using the Cloud SQL Socket Library that uses an SSL session with short-lived certs: https://cloud.google.com/sql/docs/external#java

Whitelisting 0.0.0.0/0 is not recommended as it opens the database to the entire world.

回答2:

Have you created local instance of google mysql or you can connecting direclty. you can check below link Google mysql database cloud connection in java or check with google driver like Class.forName("com.mysql.jdbc.GoogleDriver");