1.点击window---点击 Preferences

 2.点击Server-Runtime Environments---点击Add

 3.Select the type of runtime environment选择8.5版本---点击next

 4.tomcat installation directory  browse 选择8.5路径---点击Finish

 5.点击Apply and Close

 6.点击Servers

 7.点击No servers are……

 8.点击Select the server type: type filter text 选择8.5---点击next

 9.点击Finish

10.点击下方Servers-Tomcat v8.5……--点击右下角那个启动按钮