我遇到了这些类型的错误
java.lang.NoClassDefFoundError: com/mongodb/Mongo
Controller.ConnectMongoDB.connectDB(ConnectMongoDB.java:8)
Controller.Controller.doPost(Controller.java:44)
javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)