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JavaWeb+MySQL实现课程管理系统

IT知识Javaweb管理系统

听闻少年二字，当与平庸相斥。这篇文章主要讲述JavaWeb+MySQL实现课程管理系统相关的知识，希望能为你提供帮助。
javaWeb+mysql实现课程管理系统

Hello，大家好，本周博主为大家带来一个简单的基于JavaWeb的课程管理系统，内容详细，好了，下面步入正题
开发环境
  • jdk1.8
  • mysql5.7
技术栈：
后端：JavaWeb+MySQL
前端：bootstrap+jsp
数据表category分类表：
CREATE TABLE `category` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT 分类id,
`cat_name` varchar(20) NOT NULL COMMENT 分类名称,
PRIMARY KEY (`id`)
)

course课程表：
CREATE TABLE `course` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT 课程id,
`course_name` varchar(20) NOT NULL COMMENT 课程名称,
`cat_id` int(11) NOT NULL COMMENT 所属分类的id,
`lesson_nums` int(11) DEFAULT NULL COMMENT 课程数量,
`price` decimal(7,2) DEFAULT NULL COMMENT 课程价格,
`cover_img` varchar(255) DEFAULT NULL COMMENT 课程封面图,
`buy_count` int(11) DEFAULT NULL COMMENT 课程购买的数量,
`view_count` int(11) DEFAULT NULL COMMENT 查看课程的数量,
`status` int(11) DEFAULT NULL COMMENT 课程状态：0：下架，1：上架,
PRIMARY KEY (`id`)
)

项目简介
课程管理系统，可对课程分类，对课程进行增删改查操作，课程支持上传封面图，可对课程名称，价格，分类进行多条件查询，实现课程列表的分页
效果图
JavaWeb+MySQL实现课程管理系统

文章图片

项目结构Java源码
JavaWeb+MySQL实现课程管理系统

文章图片
前端结构
JavaWeb+MySQL实现课程管理系统

文章图片

核心代码BaseServlet
该类为通用类，该类继承于HttpServlet，拦截所有请求并通过反射的方式调用方法
public class BaseServlet extends HttpServlet

@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
//1. 获取请求的URI路径，如果 /user/login如果访问 /user/register
String uri = req.getRequestURI();

//2. 获取最后 / 后面的内容， loginregister
String methodName = uri.substring(uri.lastIndexOf("/") + 1);

//3. 调用方法
try
Method m = this.getClass().getMethod(methodName, HttpServletRequest.class,HttpServletResponse.class);
m.invoke(this, req,resp);
catch (Exception e)
e.printStackTrace();





RouteServlet
路由跳转类，因为所有的jsp页面都放进了/WEB-INF下，该目录下的文件只支持转发方式来访问，一是封装了跳转的方法，二是跳转时可携带数据
@WebServlet("/route/*")
public class RouteServlet extends BaseServlet

CourseService courseService = new CourseServiceImpl();
CategoryService categoryService = new CategoryServiceImpl();

private static final Integer PAGE_SIZE = 2;

public void list(HttpServletRequest req, HttpServletResponse resp)
try
String courseName = req.getParameter("course_name");
String cid = req.getParameter("cid");
String min = req.getParameter("min");
String max = req.getParameter("max");
String strPageNumb = req.getParameter("pageNumb");
Integer pageNumb = 1;
if (!StringUtils.isEmpty(strPageNumb) & & NumberUtils.isDigits(strPageNumb))
pageNumb = Integer.valueOf(strPageNumb);

PageInfo pager = courseService.queryList(pageNumb, PAGE_SIZE, courseName, cid, min, max);
List< Category> categoryList = categoryService.queryList();
req.setAttribute("courseName", courseName);
req.setAttribute("cid", cid);
req.setAttribute("min", min);
req.setAttribute("max", max);
req.setAttribute("categoryList", categoryList);
req.setAttribute("pager", pager);
req.getRequestDispatcher("/WEB-INF/list.jsp")
.forward(req, resp);
catch (Exception e)
// TODO Auto-generated catch block
e.printStackTrace();



public void add(HttpServletRequest req, HttpServletResponse resp)
try
List< Category> categoryList = categoryService.queryList();
req.setAttribute("categoryList", categoryList);
req.getRequestDispatcher("/WEB-INF/add.jsp")
.forward(req, resp);
catch (Exception e)
// TODO Auto-generated catch block
e.printStackTrace();




public void edit(HttpServletRequest req, HttpServletResponse resp)
try
String id = req.getParameter("id");
Course course = courseService.getById(id);
List< Category> categoryList = categoryService.queryList();
req.setAttribute("categoryList", categoryList);
req.setAttribute("course", course);
req.getRequestDispatcher("/WEB-INF/edit.jsp")
.forward(req, resp);
catch (Exception e)
// TODO Auto-generated catch block
e.printStackTrace();




FileUploadUtils
文件工具上传类，该类封装了上传文件方法
public class FileUploadUtils extends HttpServlet

/**
* @param basePath用户指定的上传目录
* @return返回上传之后的文件名称
* @throws FileUploadException
*/
public static String upload(String basePath,HttpServletRequest req) throws Exception


//1. 先上传文件，并返回上传的文件名称，便于将来通过名字找到该文件
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload fileUpload = new ServletFileUpload(factory);

//将request请求的内容解析成List集合 input[type=file]，input[type=text],
List< FileItem> list = fileUpload.parseRequest(req);

String dbpath = "";
for(FileItem item:list)
if(item.isFormField())
//普通的文本框:
String fieldName = item.getFieldName(); //获取字段名 username\\route_id
String fieldValue = https://www.songbingjia.com/android/item.getString("UTF-8"); //获取字段值 张三丰
req.setAttribute(fieldName, fieldValue);
else
//文件上传框
//1. 获取文件输入流
InputStream input = item.getInputStream();

if(input.available() > 0)
//2. 获取文件输出流
//String basePath = "D:/uploads/";

//确定目标文件名
String destFileName = UUID.randomUUID().toString().replace("-", "");

//确定目标文件后缀：.png.jpg.gif
String originName = item.getName();
String suffix = originName.substring(originName.lastIndexOf("."));

//保存到数据库中的相对路径
dbpath = destFileName+suffix;

//如果当前文件的父级目录不存在，则创建
File destFile = new File(basePath+dbpath);
if(!destFile.getParentFile().isDirectory())
destFile.getParentFile().mkdirs();

//创建文件输出流
FileOutputStream output = new FileOutputStream(destFile);

//3. 开始读写（上传、拷贝）
byte[] arr = new byte[1024];
int res = 0;
while( (res = input.read(arr)) > 0)
output.write(arr, 0, res);


//关闭资源
input.close();
output.close();





return dbpath; // 返回文件名称



前端部分代码list.jsp
< %@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
< %@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
< !DOCTYPE html>
< html lang="en">
< head>
< %
request.setAttribute("APP_PATH", request.getContextPath());

%>
< meta charset="UTF-8">
< meta name="viewport" content="width=device-width, initial-scale=1.0">
< title> Document< /title>

< link rel="stylesheet" href="https://www.songbingjia.com/android/$APP_PATH/static/admin/css/bootstrap.min.css">
< style>
.cus-container
width: 1368px;

.success th,table tdtext-align:center;
< /style>
< /head>
< body>
< div class="container cus-container">

< h3 class="text-center" style="font-weight:bold"> 课程列表< /h3>

< div>

< div id="search-user" style="float: left; margin: 10px 0px; ">
< form class="form-inline" action="$APP_PATH /route/list" method="post" >
< div class="form-group">
< label for="course_name"> 课程名称< /label>
< input type="text" name="course_name" value="https://www.songbingjia.com/android/$courseName" class="form-control" id="course_name" >
< /div>

< div class="form-group">
< label> 课程分类< /label>
< select class="form-control" name="cid">
< option value=""> 请选择< /option>
< c:forEach items="$categoryList " var="cat">
< option value="https://www.songbingjia.com/android/$cat.id" $cid == cat.id ? "selected":""> $cat.cat_name< /option>
< /c:forEach>
< /select>
< /div>

< div class="form-group">
< label for="exampleInputName2"> 价格:< /label>
< input type="text" name="min" value="https://www.songbingjia.com/android/$min" class="form-control" > -< input type="text" name="max" value="https://www.songbingjia.com/android/$max" class="form-control" >
< /div>


< input type="submit"class="btn btn-default" value="https://www.songbingjia.com/android/查询">

< /form>
< /div>

< /div>


< div>

< div style="float: right; margin: 10px 0px; ">
< a class="btn btn-primary" href="https://www.songbingjia.com/android/$APP_PATH/route/add"> 添加课程< /a>
< /div>
< /div>

< table class="table table-bordered clearfix">
< tr class="success">
< th> 课程序号< /th>
< th> 课程名称< /th>
< th> 分类名称< /th>
< th> 总课时< /th>
< th> 课程价格< /th>
< th> 课程封面< /th>
< th> 购买数量< /th>
< th> 观看数量< /th>
< th> 状态< /th>
< th> 操作< /th>
< /tr>

< c:forEach items="$pager.courseList " var="course">
< tr>
< td style="vertical-align:middle; width:100px">
$course.id
< /td>
< td style="vertical-align:middle; width:135px">
$course.course_name
< /td>

< td style="vertical-align:middle; ">
$course.cat_name
< /td>
< td style="vertical-align:middle; ">
$course.lesson_nums
< /td>
< td style="vertical-align:middle; ">
$course.price
< /td>
< td style="width:200px; height:100px; vertical-align:middle; ">
< img src="http://127.0.0.1/upload/images/$course.cover_img " style="width:100%; height:100%">
< /td>
< td style="vertical-align:middle; ">
$course.buy_count
< /td>

< td style="vertical-align:middle; ">
$course.view_count
< /td>

< td style="vertical-align:middle; ">
< c:if test="$course.status == 0 "> 已下架< /c:if>
< c:if test="$course.status == 1 "> 已上架< /c:if>
< /td>

< td style="vertical-align:middle; width:135px">
< a class="btn btn-default btn-sm" href="https://www.songbingjia.com/android/$APP_PATH/route/edit?id=$course.id"> 修改< /a>  
< a class="btn btn-default btn-sm" href="https://www.songbingjia.com/android/$APP_PATH/course/delete?id=$course.id& cover_img=$course.cover_img"> 删除< /a>
< /td>
< /tr>

< /c:forEach>

< /table>


< div>

< nav style="float: left; ">
< ul class="pagination">

< li $pager.pageNumb == 1 ? "class=disabled":"">
< a href="https://www.songbingjia.com/android/$APP_PATH /route/list?pageNumb=$pager.prevPageNumb& course_name=$courseName& cid=$cid& min=$min& max=$max" aria-label="Previous">
< span aria-hidden="true"> 上一页< /span>
< /a>
< /li>
< c:forEach begin="1" end="$pager.pageCount " var="i">
< li $pager.pageNumb == i ? "class=active":"" >
< a href="https://www.songbingjia.com/android/$APP_PATH /route/list?pageNumb=$i& course_name=$courseName& cid=$cid& min=$min& max=$max"> $i< /a>
< /li>
< /c:forEach>


< li $pager.pageNumb == pager.pageCount ? "class=disabled":"">
< a href="https://www.songbingjia.com/android/$APP_PATH /route/list?pageNumb=$pager.nextPageNumb& course_name=$courseName& cid=$cid& min=$min& max=$max" aria-label="Previous">
< span aria-hidden="true"> 下一页< /span>
< /a>
< /li>



< /ul>
< /nav>
< div style="float: right; margin-top: 25px; ">
< span> 共$pager.total条记录，分$pager.pageCount页显示< /span>
< /div>
< /div>
< /div>
< /body>
< /html>

add.jsp
==注意：form表单需加enctype="multipart/form-data"==
【JavaWeb+MySQL实现课程管理系统】将表单设置为支持图片上传
< %@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
< %@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
< !DOCTYPE html>
< html lang="en">
< head>
< %
request.setAttribute("APP_PATH", request.getContextPath());
%>
< meta charset="UTF-8">
< meta name="viewport" content="width=device-width, initial-scale=1.0">
< title> Document< /title>
< link rel="stylesheet" href="https://www.songbingjia.com/android/$APP_PATH/static/admin/css/bootstrap.min.css">
< script src="https://www.songbingjia.com/android/$APP_PATH/static/admin/js/jquery-2.1.0.min.js"> < /script>
< script src="https://www.songbingjia.com/android/$APP_PATH/static/admin/js/bootstrap.min.js"> < /script>

< /head>
< body>

< div class="container cus-container">
< h3 class="text-center" style="font-weight:bold"> 添加课程< /h3>

< form action="$APP_PATH/course/addHandle" method="post"
enctype="multipart/form-data">
< div class="form-group">
< label for="user"> 课程名称：< /label>
< input type="text" class="form-control" name="course_name">
< /div>

< div class="form-group">
< label for="user"> 所属分类：< /label>
< select class="form-control" name="cid">
< option value="https://www.songbingjia.com/android/0"> 请选择< /option>
< c:forEach items="$categoryList " var="cat">
< option value="https://www.songbingjia.com/android/$cat.id"> $cat.cat_name < /option>
< /c:forEach>
< /select>
< /div>

< div class="form-group">
< label for="user"> 课程封面图：< /label>
< input type="file" class="form-control" name="cover_img">
< /div>

< div class

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