After installing the CentOS7, local Windows system is connected with the campus network, the virtual machine using a bridging mode, no Internet access.
The solution is: find a card campus network connection to the virtual machine's shared VMnet8.
Steps: Open Network and Sharing Center [] - [Change Adapter Settings] - [campus network to find the corresponding card] - Right Properties - sharing
Want to share can be set as shown in FIG.
Set in the virtual machine settings
Then enter the Linux network connection to the Internet.