jsp页面出现Multiple annotations found at this line: - The superclass "javax.servlet.http.HttpServlet" w

在jsp页面显示“Multiple annotations found at this line:
- The superclass "javax.servlet.http.HttpServlet" was not found on the Java 

Build Path”

解决步骤：

1、右击项目-Properties；

2、点击Targeted Runtimes；

3、选择 Apache Tomcat vxxx；

4、点击Apply 或者Apply and close。