The Apache tomcat installation at this directory are version 8.5.6A Tomcat 8.0 installation is Expec_eclipse

1. When installing tomcat8.5.6 in Eclipse, error:

The Apache Tomcat installation at this directory is version 8.5.6. A Tomcat 8.0 installation is expected.

2. Based on the online solution to try

Online Solutions: (http://blog.csdn.net/u013066244/article/details/52838169)
In Windows

① Locate the Lib directory in the Tomcat installation directory and find Catalina.jar. Use compression software (winrar or good pressure) to open it.

② in turn find and double hit open org\apache\catalina\util\serverinfo.properties file

Server.info=apache tomcat/8.5.6
server.number=8.5.6.0
SERVER.BUILT=OCT 6 2016 20:15:31 UTC

To

#Apache tomcat/8.5.6
Server.info=apache tomcat/8.0.0
#8.5.6.0
server.number=8.0.0
SERVER.BUILT=OCT 6 2016 20:15:31 UTC

3. The following problems arise:
Unknown version of Tomcat was specified.

4. The final outcome method, which replaces the Tomcat version from 8 to 7, solves the problem:
Specify the installation directory