HTTP Status 500 -
type Exception report
message
description The server encountered an internal error that prevented it from fulfilling this request.
exception
java.lang.NullPointerException
casecom.Service.LoginService.checkPassword(LoginService.java:18)
casecom.Servlet.Servlet.doPost(Servlet.java:74)
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)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.77 logs.
Apache Tomcat/7.0.77
java的课程作业,这是最后一步了,非常心碎,求大神解决!