项目问题？

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项目问题？

来源：5-3 项目作业

tttjh_

2021-03-26 20:36:04

1、为什么启动tomcat说存在一个或多个监听器，然后就启动失败了

2、为什么我登录重定向到bookList.html页面不行，说我这个文件找不到呢？

我的登录见面login.jsp还是得放在web文件目录才能被访问到，放在web的WEB-INF的jsp文件下依然也是不能被访问到的。

<%@ page contentType="text/html; charset=utf-8" language="java" %>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>登录</title>
        <link rel="stylesheet" href="/css/login.css">
    </head>
    <body>
        <div class="login">
            <div class="header">
                <h1>
                    <a href="/login.do">登录</a>
                </h1>
                <button></button>
            </div>
            <form action="/management" method="post">
                <div class="name">
                    <input type="text" id="name" name="username">
                    <p></p>
                </div>
                <div class="pwd">
                    <input type="password" id="pwd" name="password">
                    <p></p>
                </div>
               
                <div class="btn-red">
                    <input type="submit" value="登录" id="login-btn">
                </div>
            </form>
        </div>
    </body>
</html>

package com.imooc.library.controller;

import com.imooc.library.entity.User;
import com.imooc.library.service.UserServiceImpl;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
import java.util.List;

/**
 * @author Comet
 */
@WebServlet("/management")
public class ManagementController extends HttpServlet {
@Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

@Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        User user = new User(username, password);
        ServletContext servletContext = request.getServletContext();
        List<User> userList = (List<User>) servletContext.getAttribute("userList");
        UserServiceImpl userService = new UserServiceImpl();
        if (userService.login(userList, user) == 1) {
            request.getSession().setAttribute("user", user);
            response.sendRedirect("/WEB-INF/jsp/bookList.html");
        }
    }
}

package com.imooc.library.service;

import com.imooc.library.entity.User;

import java.util.List;

/**
 * @author Comet
 */

public class UserServiceImpl {

/**
     * 验证登录信息
     * @param userList 用户信息集合
     * @param user 登录的用户
     * @return 用户账号密码匹配成功则返回1，否则返回0
     */
    public int login(List<User> userList, User user) {
if (user.getUserName() == null || user.getUserName().equals("")){
return 0;
        }
if (user.getUserPassword() == null || user.getUserPassword().equals("")) {
return 0;
        }
for (User user1 : userList) {
if (user.getUserName().equals(user1.getUserName()) && user.getUserPassword().equals(user1.getUserPassword())) {

return 1;
            }
        }
return 0;
    }
}

package com.imooc.library.utils;

import com.imooc.library.entity.User;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.util.List;

/**
 * @author Comet
 */
@WebListener
public class InitListener implements ServletContextListener {


@Override
    public void contextInitialized(ServletContextEvent sce) {
/* This method is called when the servlet context is initialized(when the Web application is deployed). */
        List<User> userList = XmlDataSource.getUsersData();
        HttpServletRequest servletContext = (HttpServletRequest) sce.getServletContext();
        servletContext.setAttribute("userList", userList);
        
    }

@Override
    public void contextDestroyed(ServletContextEvent sce) {
/* This method is called when the servlet Context is undeployed or Application Server shuts down. */
    }

}

package com.imooc.library.utils;

import com.imooc.library.entity.User;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.List;

/**
 * @author Comet
 */
public class XmlDataSource {
private static List<User> usersData;
    private static String userDataFile;

    static {
userDataFile = XmlDataSource.class.getResource("/user.xml").getPath();
    }

/**
     * 加载用户信息
     */
    private static void reloadUser() {
//        URLDecoder decoder = new URLDecoder();
        try {
            URLDecoder.decode(userDataFile, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        SAXReader reader = new SAXReader();
        try {
            Document document = reader.read(userDataFile);
            List<Node> nodes = document.selectNodes("/root/user");
            for (Node node : nodes) {
                Element element = (Element) node;
                String username = element.attributeValue("userName");
                String userPassword = element.attributeValue("userPassword");
                User user = new User(username, userPassword);
                usersData.add(user);
            }

        } catch (DocumentException e) {
            e.printStackTrace();
        }
    }

static {
reloadUser();
    }

/**
     * @return 返回用于信息list集合
     */
    public static List<User> getUsersData() {
return usersData;
    }
}