访问添加路径，报java.lang.NoSuchMethodError: javax.servlet.ServletInputStream.isFinished()Z
jetty9.4+Lucene6+javax.servlet-api-3.1.0.jar，为什么一访问就报这个错？明明javax.servlet-api-3.1.0.jar这个包里有isFinished()方法。
{
"timestamp": "2018-07-23T15:34:56.128+0000",
"status": 500,
"error": "Internal Server Error",
"message": "java.lang.NoSuchMethodError: javax.servlet.ServletInputStream.isFinished()Z",
"path": "/add/people/man"
}
