[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.0:compile (default-compile) on project ahgy: Compilation failure
[ERROR] /Users/lht/workspace/idea_workspace/ahah/src/main/java/com/hn/core/StartSetup.java:[32,63] 找不到符号
[ERROR]   符号:   方法 getContextPath()
[ERROR]   位置: 接口 javax.servlet.ServletContext
[ERROR] 
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

项目是maven-archetype-webapp类型，使用mvn:clean都是正常的 ，pom文件中也增加了servlet依赖jar

<dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
          <groupId>javax.servlet.jsp</groupId>
          <artifactId>javax.servlet.jsp-api</artifactId>
          <version>2.2.1</version>
          <scope>provided</scope>
        </dependency>