系统找不到指定的文件。

/*

运行报错：

六月 28, 2020 10:57:28 下午 org.apache.catalina.core.StandardContext backgroundProcess

警告: 异常处理加载程序[WebappLoader[/shop]]后台进程

java.lang.IllegalStateException: java.io.FileNotFoundException: D:\apache-tomcat-8.5.53\webapps\shop\WEB-INF\lib\commons-fileupload-1.2.1.jar (系统找不到指定的文件。)

at org.apache.catalina.webresources.AbstractSingleArchiveResourceSet.getArchiveEntry(AbstractSingleArchiveResourceSet.java:100)

at org.apache.catalina.webresources.AbstractArchiveResourceSet.getResource(AbstractArchiveResourceSet.java:257)

at org.apache.catalina.webresources.StandardRoot.getResourceInternal(StandardRoot.java:281)

at org.apache.catalina.webresources.Cache.getResource(Cache.java:62)

at org.apache.catalina.webresources.StandardRoot.getResource(StandardRoot.java:216)

at org.apache.catalina.webresources.StandardRoot.getClassLoaderResource(StandardRoot.java:225)

at org.apache.catalina.loader.WebappClassLoaderBase.modified(WebappClassLoaderBase.java:730)

at org.apache.catalina.loader.WebappLoader.modified(WebappLoader.java:347)

at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:291)

at org.apache.catalina.core.StandardContext.backgroundProcess(StandardContext.java:5539)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1381)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1385)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1385)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1353)

at java.lang.Thread.run(Unknown Source)

Caused by: java.io.FileNotFoundException: D:\apache-tomcat-8.5.53\webapps\shop\WEB-INF\lib\commons-fileupload-1.2.1.jar (系统找不到指定的文件。)

at java.util.zip.ZipFile.open(Native Method)

at java.util.zip.ZipFile.<init>(Unknown Source)

at java.util.zip.ZipFile.<init>(Unknown Source)

at java.util.jar.JarFile.<init>(Unknown Source)

at java.util.jar.JarFile.<init>(Unknown Source)

at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:197)

at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:182)

at org.apache.catalina.webresources.AbstractArchiveResourceSet.openJarFile(AbstractArchiveResourceSet.java:308)

at org.apache.catalina.webresources.AbstractSingleArchiveResourceSet.getArchiveEntry(AbstractSingleArchiveResourceSet.java:96)

... 14 more

*/

package com.imooc.web.action;

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.imooc.domain.User;

import com.imooc.service.UserService;

import com.imooc.service.impl.UserServiceImpl;

/**

 * Servlet implementation class UserServlet

 */

@WebServlet("/UserServlet")

public class UserServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

//接收参数

String methodName = request.getParameter("method");

//判断

if("login".equals(methodName)) {

login(request,response);

}

}

/**

* UserSevlet中登录的方法

* @param request

* @param response

* @throws IOException 

* @throws ServletException 

*/

private void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

//接收用户名和密码

String username = request.getParameter("username");

String password = request.getParameter("password");

System.out.println(username+" "+password);

//数据的封装

User user = new User();

user.setUsername(username);

user.setPassword(password);

//处理数据

UserService userService = new UserServiceImpl();

User existUser = userService.login(user);

//根据处理结果，完成页面跳转

if(existUser == null) {

//登录失败

//返回到登录页

request.setAttribute("msg", "用户名或密码错误！！！");

request.getRequestDispatcher("/admin/login.jsp").forward(request, response);

}else {

//登录成功

//将用户信息进行保存，进行页面跳转

request.getSession().setAttribute("existUser", existUser);

response.sendRedirect(request.getContextPath()+"/admin/category_list.jsp");

}

}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

doGet(request, response);

}

}

package com.imooc.dao.impl;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import com.imooc.dao.UserDao;

import com.imooc.domain.User;

import com.imooc.utils.JDBCUtils;

public class UserDaoImpl implements UserDao {

@Override

public User login(User user) {

Connection conn = null;

PreparedStatement pstmt = null;

ResultSet rs = null;

try {

// 获得连接

conn = JDBCUtils.getConnection();

// 编写SQL

String sql = "select * from user where username = ? and password = ?";

// 预编译SQL

pstmt = conn.prepareStatement(sql);

// 设置参数

pstmt.setString(1, user.getUsername());

pstmt.setString(2, user.getPassword());

// 执行

rs = pstmt.executeQuery();

if(rs.next()) {

User existUser = new User();

existUser.setUid(rs.getInt("uid"));

existUser.setUsername(rs.getString("username"));

existUser.setPassword(rs.getString("password"));

return existUser;

}

} catch (Exception e) {

e.printStackTrace();

} finally {

// 释放资源

JDBCUtils.release(rs, pstmt, conn);

}

return null;

}

}

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8">

    <title>欢迎使用油画商城</title>

    <meta name="keywords" content="HTML5 Bootstrap 3 Admin Template UI Theme" />

    <meta name="description" content="AbsoluteAdmin - A Responsive HTML5 Admin UI Framework">

    <meta name="author" content="AbsoluteAdmin">

    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/assets/skin/default_skin/css/theme.css">

    <link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/assets/admin-tools/admin-forms/css/admin-forms.css">

    <link rel="shortcut icon" href="${pageContext.request.contextPath }/assets/img/favicon.ico">

</head>

<body class="external-page external-alt sb-l-c sb-r-c">

<div id="main" class="animated fadeIn">

    <section id="content_wrapper">

        <section id="content">

            <div class="admin-form theme-info mw500" id="login">

                <div class="content-header">

                    <h1>油画商城</h1>

                    <p class="lead">欢迎使用油画商城自动化管理系统</p>

                    <font color="red">${ msg }</font>

                </div>

                <div class="panel mt30 mb25">

                    <form method="post" action="${pageContext.request.contextPath }/UserServlet" id="contact">

                        <input type="hidden" name="method" value="login"/>

                        <div class="panel-body bg-light p25 pb15">

                            <div class="section">

                                <label for="sn" class="field-label text-muted fs18 mb10">名称</label>

                                <label for="sn" class="field prepend-icon">

                                    <input type="text" name="username" id="username" class="gui-input" placeholder="请输入名称...">

                                    <label for="sn" class="field-icon">

                                        <i class="fa fa-user"></i>

                                    </label>

                                </label>

                            </div>

                            <div class="section">

                                <label for="password" class="field-label text-muted fs18 mb10">密码</label>

                                <label for="password" class="field prepend-icon">

                                    <input type="password" name="password" id="password" class="gui-input" placeholder="请输入密码...">

                                    <label for="password" class="field-icon">

                                        <i class="fa fa-lock"></i>

                                    </label>

                                </label>

                            </div>

                        </div> 

                        <div class="panel-footer clearfix text-center">

<button type="submit" class="button btn-primary mr10"> 登陆 </button>

                        </div>

                    </form>

                </div>

            </div>

        </section>

    </section>

</div>

<script src="vendor/jquery/jquery-1.11.1.min.js"></script>

<script src="vendor/jquery/jquery_ui/jquery-ui.min.js"></script>

<script src="assets/js/utility/utility.js"></script>

<script src="assets/js/demo/demo.js"></script>

<script src="assets/js/main.js"></script>

</body>

</html>

<?xml version="1.0" encoding="UTF-8"?>

<c3p0-config>

  <default-config>

    <property name="driverClass">com.mysql.jdbc.Driver</property>

    <property name="jdbcUrl">jdbc:mysql:///shop</property>

    <property name="user">root</property>

    <property name="password">root123</property>

  </default-config>

</c3p0-config>