cant resolve method getContextPath

这里需要分别导入jsp和servlet的包
maven添加：

    <!-- https://mvnrepository.com/artifact/javax.servlet/jsp-api -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>provided</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>

可以自行百度，maven jsp和maven servlet