maven新建 webapp项目后JSP文件报错怎样chul

在pom.xml配置文件中添加上javax.servlet的相关依赖：

  <dependencies>
  
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    
   <dependency>
     <groupId>javax.servlet</groupId>
     <artifactId>servlet-api</artifactId>
     <version>2.5</version>
     <scope>provided</scope>
  </dependency>
    
  </dependencies>

依赖tomcat类库：

项目右击—>build path —> configure build path — >libraries — > add libraries —> Server Runtime — >选择tomcat —> ok