After installing Oracle VM VirtualBox, I found that the centos in the original virtual machine VMware could not access the Internet. I did my own research and found that VirtualBox and VMware can't access the Internet at the same time. I simply found some solutions.
Step 1: Enter the network management (window7 is the network and sharing center), and then click on change adapter settings
Step 2: Right-click to disable the network service of VirtualBox Host-Only Network, then right-click and select Properties.
Step 3: Remove the check mark before VirtualBox Bridged Networking Driver in the property management
Then restart VMware
Note: If you want to go back to using VirtualBox, you can follow the method just now 1. Disable the network of VMware Network Adapter VMnet1 and VMware Network Adapter VMnet8, enable the network of VirtualBox Host-Only Network 2. Then check VirtualBox Bridged Networking Driver3 in the adapter property management .Remove VMware Bridged Protocol from adapter property management