JSP page error handling method After successful Java project import

I imported a MAVEN project but the JSP page has been an error, I first follow the online experience to operate the following steps:

Add dependent dependencies on Javax.servlet in the Pom.xml configuration file:

　　　　<dependency> 
　　　　<groupId>javax.servlet</groupId> 
　　　　<artifactId>servlet-api</artifactId> 
　　　　<version>2.5</version> 
　　　　<scope>provided</scope> 
　　　　</dependency>

Rely on the Tomcat class library:

Project Right-click->build path-> Configure Build path->libraries-> Add libraries-> server runtime-> Select a server lib -OK

This method does not solve the JSP error problem, the final search found the following methods:

Windows->preferences->validation-> Show a confirmation dialog when PERFORMNG manual validations front of √ remove Disable all-> apply-> OK

This approach ultimately solves the problem

JSP page error handling method After successful Java project import