visit the Google apis console,click "Create project"

Activate the Drive API and Drive SDK

Create an OAuth 2.0 Client ID

Input product name

Select application type

Download JSON

Checkout Instructions

Clone the project from remote

      $ cd [someDirectory]

      $ hg clone https://code.google.com/p/google-api-java-client.samples/ 
        google-api-java-client-samples

      $ cd google-api-java-client-samples/drive-cmdline-sample

      $ cp ~/Downloads/client_secrets.json src/main/resources/client_secrets.json

Init variables in DriveSample.java

Compile and Run

      $ mvn compile
      $ mvn -q exec:java

Input Usrname and Passwd

Apply the request

if there is no errors displayed,
and you will see a file named "drivetest-XXX" in the local dictory.

<Thank you for your watch!>