first you have to understand that the project you are importing is likely to be different from your current Eclipse environment,and theJDK version is consistent with the JRE version . , such as those used in the project Tomcat the name is 777 , you have Eclipse there is no 777 of the Tomcat , first make changes to where the environment needs to be changed!
and then solve the JSP file is a fork problem, for the JSP file said servlet,jsp , etc. do not know, Then there are basically two jar packages missing, and these two jar packages are available in the Tomcat installation directory
Jsp-api.jar
Servlet-api.jar
import these two jar packages with
at this point all the forks on the JSP file should be gone, and if you have a fork on your project, it's because the previous environment Tomcat can't find it, and you post the project to your own Tomcat , OK, problem solved!
Import the project into the MyEclipse, the project on the fork, the JSP file is a fork