4강에서 로그인페이지 아이디 비번 입력하고 넘어가는 부분에서 에러가납니다

Question

아이디랑 비번을 치면 넘어가야하는데 자꾸 에러가나요ㅠㅠ 에러는 HTTP Status 500 – Internal Server Error Type Exception Report Message Can't find a method to write property [userID] of type [java.lang.String] in a bean of type [user.User] Description The server encountered an unexpected condition that prevented it from fulfilling the request. Exception org.apache.jasper.JasperException: Can't find a method to write property [userID] of type [java.lang.String] in a bean of type [user.User] org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(JspRuntimeLibrary.java:321) org.apache.jsp.loginAction_jsp._jspService(loginAction_jsp.java:125) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:742) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330) javax.servlet.http.HttpServlet.service(HttpServlet.java:742) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) Note The full stack trace of the root cause is available in the server logs. Apache Tomcat/8.5.41 이렇게 뜹니다 제코드는 똑같이헀는데요.. package user; public class User { private String userID ; private String userPassword ; private String userName ; private String userGender ; private String userEmail ; public String getUserID() { return userID ; } public void setUserId(String userID ) { this . userID = userID ; } public String getUserPassword() { return userPassword ; } public void setUserPassword(String userPassword ) { this . userPassword = userPassword ; } public String getUserName() { return userName ; } public void setUserName(String userName ) { this . userName = userName ; } public String getUserGender() { return userGender ; } public void setUserGender(String userGender ) { this . userGender = userGender ; } public String getUserEmail() { return userEmail ; } public void setUserEmail(String userEmail ) { this . userEmail = userEmail ; } } //loginAction <%@ page language = "java" contentType = "text/html; charset=UTF-8" pageEncoding = "UTF-8" %> <%@ page import = "user.UserDAO" %> <%@ page import = "java.io.PrintWriter" %> <% request.setCharacterEncoding( "UTF-8" ); %> < jsp:useBean id = "user" class = "user.User" scope = "page" /> < jsp:setProperty name = "user" property = "userID" /> < jsp:setProperty name = "user" property = "userPassword" /> < html > < head > < meta charset = "UTF-8" > < title > JSP web board page < body > <% UserDAO userDAO = new UserDAO(); int result = userDAO.login(user.getUserID(), user.getUserPassword()); if (result == 1){ PrintWriter script = response.getWriter(); script.println( "" ); } else if (result == 0){ PrintWriter script = response.getWriter(); script.println( "" ); } else if (result == -1){ PrintWriter script = response.getWriter(); script.println( "" ); } else if (result == -2){ PrintWriter script = response.getWriter(); script.println( "" ); } %> 대체 뭐가 문제인걸까요?