His administration is doing everything they can to stop the attacks from China. Obama would not be able to stop them him self because I am positive he does not have he technical skills to do so. BUT we do have the best and brightest mind in the country and will figure a way to stop them.
The current administration may be able to mitigate the current cyber attacks, but computer software is so advanced and complicated that loopholes are constantly found and exploited by hackers. Software is also constantly updated, which can fix loopholes, but it can also create new ones unintentionally. With the way computers work, there is always going to be some vulnerability.
This President has consistently refused to stand up for America and American interests throughout his Presidency. Similar to that of Jimmy Carter, the Obama Presidency has been and will continue to be met by various other enemy countries, neutral countries and anti-American organizations being bolder about their hatred for America, because the American government will not strong in standing against them.
I don't think it's up to Obama to make that decision. When it comes down to it, it really has to be stopped by China. The United States can not govern the world. Obama needs to focus on internal affairs before he can act upon issues with China's bullying attacks.