The demo that used Mycat database middleware to separate read and write data was built two days ago. The Mycat used was Mycat-server-1.6-RELEASE-20161028204710-win.tar downloaded directly from the official website. It was found that problems often occurred during startup. , and the problem is not easy to solve. I just searched the Internet for articles about using Mycat for read-write separation, and I found some tricks. I 
use the following Mycat version, as long as there are no errors in the configuration files of server.xml and schema.xml. If so, start it directly and succeed immediately. Use sqlyog (a visualization tool used at home), follow the method of connecting to mysql, and continue, OK! Below is the download of the Mycat version:
Link: https://pan.baidu.com/s/1Kh7W-ee8bkfangSr7gkweA Password: 6xpg