Servlet+JDBC设计实现图书系统管理功能实现

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写在前面,之前由于种种原因博客好久没有更新。最近打算重拾JavaWeb,所以从头开始,先用servlet+jdbc+bootstrap最基础的代码实现一个图书系统。考虑有管理员端+用户端,项目完成后会上传至github,后期会升级ssh/ssm等,毕竟是温故学习,一点一点来,项目会一直更新补充!

  github地址——https://github.com/vi3nty/BookSystem

  2018.04.16更新,管理端进一步完善,页面优化调整

  2018.03.29更新,管理端实现了过滤功能(管理端大部分功能已经完善,只剩下JS/JQ的还没有,等用户端写完了再说)

  2018.03.26更新,管理端添加图书编辑页面(book.jsp),并采用了jquery的ajax技术

  2018.03.22更新,管理端采用EL&JSTL进行了页面重构,并且添加分页功能

1.项目结构


│ .classpath
│ .gitignore
│ .project
│ LICENSE
│ README.md

├─.settings
│ .jsdtscope
│ org.eclipse.core.resources.prefs
│ org.eclipse.jdt.core.prefs
│ org.eclipse.wst.common.component
│ org.eclipse.wst.common.project.facet.core.xml
│ org.eclipse.wst.css.core.prefs
│ org.eclipse.wst.html.core.prefs
│ org.eclipse.wst.jsdt.ui.superType.container
│ org.eclipse.wst.jsdt.ui.superType.name

├─build
│ └─classes
│ ├─biz
│ │ │ AdminBiz.class
│ │ │ bookBiz.class
│ │ │
│ │ └─impl
│ │ AdminBizImpl.class
│ │ bookBizImpl.class
│ │
│ ├─dao
│ │ │ AdminDao.class
│ │ │ bookDao.class
│ │ │
│ │ └─impl
│ │ AdminDaoImpl.class
│ │ bookDaoImpl.class
│ │
│ ├─pojo
│ │ admin.class
│ │ book.class
│ │ PageBean.class
│ │
│ ├─servlet
│ │ AdminServlet.class
│ │ BookServlet.class
│ │ LogFilter.class
│ │ LoginServlet.class
│ │
│ └─utils
│ myDB.class

├─src
│ ├─biz
│ │ │ AdminBiz.java
│ │ │ bookBiz.java
│ │ │
│ │ └─impl
│ │ AdminBizImpl.java
│ │ bookBizImpl.java
│ │
│ ├─dao
│ │ │ AdminDao.java
│ │ │ bookDao.java
│ │ │
│ │ └─impl
│ │ AdminDaoImpl.java
│ │ bookDaoImpl.java
│ │
│ ├─pojo
│ │ admin.java
│ │ book.java
│ │ PageBean.java
│ │
│ ├─servlet
│ │ AdminServlet.java
│ │ BookServlet.java
│ │ LogFilter.java
│ │ LoginServlet.java
│ │
│ └─utils
│ myDB.java

└─WebContent
├─css
│ bootstrap-theme.css
│ bootstrap-theme.css.map
│ bootstrap-theme.min.css
│ bootstrap-theme.min.css.map
│ bootstrap.css
│ bootstrap.css.map
│ bootstrap.min.css
│ bootstrap.min.css.map

├─fonts
│ glyphicons-halflings-regular.eot
│ glyphicons-halflings-regular.svg
│ glyphicons-halflings-regular.ttf
│ glyphicons-halflings-regular.woff
│ glyphicons-halflings-regular.woff2

├─img
│ │ duzhe.jfif
│ │ qingnian.jfif
│ │ s28350186.jpg
│ │ s29643861.jpg
│ │ s29672551.jpg
│ │ s29686001.jpg
│ │
│ └─readme
│ admin.PNG

├─js
│ bootstrap.js
│ bootstrap.min.js
│ jquery-3.3.1.js
│ npm.js

├─META-INF
│ MANIFEST.MF

├─web
│ admin.jsp
│ AdminLogin.jsp
│ book.jsp

└─WEB-INF
│ web.xml

└─lib
mysql-connector-java-5.1.46-bin.jar
taglibs-standard-impl-1.2.5.jar
taglibs-standard-spec-1.2.5.jar

 

 

  项目采取最基础的MVC分层架构,全部采用servlet+jdbc方式实现。jsp作为v层,servlet作为controller层与业务层代码关联,整个代码做到最大限度的低耦合。前端主要是jQuery和Bootstrap,毕竟我前端了解的少,仅仅会用几个API,所以整个项目前端不做过多赘述。

2.项目分层概述

  ①dao层主要是处理与数据库交互的逻辑

  AdminDao.java

1 public interface AdminDao {
2     public boolean adminLogin(String admin,String password);
3 }

  AdminDaoImpl.java

 1 public class AdminDaoImpl implements AdminDao{
 2     public boolean adminLogin(String admin, String password) {
 3         Connection conn=null;
 4         PreparedStatement st=null;
 5         ResultSet rs=null;
 6         Boolean result=false;
 7         try {
 8             //获取连接
 9             conn=myDB.getConnection();
10             //编写SQL语句
11             String adminLoginSql="select * from aduser where adname=\'"+admin+"\' and password=\'"+password+"\'";
12             //创建语句执行者
13             st=conn.prepareStatement(adminLoginSql);
14             //获取结果
15             rs=st.executeQuery();
16             if(rs.next())
17                 result=true;
18             else
19                 result=false;
20         } catch (Exception e) {
21             e.printStackTrace();
22         }
23         finally {
24             myDB.closeResource(conn, st, rs);
25         }
26         return result;
27     }
28 }

 

  ②biz层主要是业务逻辑的实现

  AdminBiz类似Dao层,所以就不贴代码了

  AdminBizImpl.java

 1 public class AdminBizImpl implements AdminBiz{
 2     private AdminDao adminDao;
 3     public boolean adminLogin(String admin, String password) {
 4         //实例化接口
 5         adminDao=new AdminDaoImpl();
 6         pojo.admin admin2=new pojo.admin();
 7         admin2.setAdmin(admin);
 8         admin2.setPassword(password);
 9         Boolean result=adminDao.adminLogin(admin2.getAdmin(), admin2.getPassword());
10         return result;
11     }
12 }

 

  ③utils是工具类,主要有数据库连接的类,这样每次操作数据库不用重写代码

  

  ④pojo层是数据库表的映射实体类

  PageBean.java类主要用于图书分页实现

  

 1 public class PageBean<T> {
 2     private int currentPage=1;//当前页,默认显示第一页
 3     private int pageCount=5;//每页显示的行数
 4     private int totalCount;//总记录数
 5     private int totalPage;//总页数=总记录数/每页显示的行数+1
 6     private List<T> pageData;
 7     
 8     //获取总页数
 9     public int getTotalPage() {
10         if(totalCount%pageCount==0)
11             totalPage=totalCount/pageCount;//被整除情况
12         else {
13             totalPage=totalCount/pageCount+1;
14         }
15         return totalPage;
16     }
17     public void setTotalPage(int totalPage) {
18         this.totalPage=totalPage;
19     }
20     public int getCurrentPage() {
21         return currentPage;
22     }
23     public void setCurrentPage(int currentPage) {
24         this.currentPage = currentPage;
25     }
26     public int getPageCount() {
27         return pageCount;
28     }
29     public void setPageCount(int pageCount) {
30         this.pageCount = pageCount;
31     }
32     public int getTotalCount() {
33         return totalCount;
34     }
35     public void setTotalCount(int totalCount) {
36         this.totalCount = totalCount;
37     }
38     public List<T> getPageData() {
39         return pageData;
40     }
41     public void setPageData(List<T> pageData) {
42         this.pageData = pageData;
43     }
44 }
View Code

 

 

 

  ⑤servlet控制层

  AdminServlet.java类(用于图书管理端分页等功能的实现)

  

 1 public class AdminServlet extends HttpServlet{
 2     @Override
 3     protected void service(HttpServletRequest req, HttpServletResponse rep) throws ServletException, IOException {
 4         int currentPage;//获得当前页
 5         String current=(String) req.getParameter("page");
 6         if(current==null)
 7             currentPage=1;
 8         else
 9             currentPage=Integer.parseInt(current);
10         //实例化业务层
11         bookBiz bookbiz=new bookBizImpl();
12         PageBean pb=new PageBean();
13         pb.setTotalCount(bookbiz.getTotalCount());
14         if(currentPage>0)
15             pb.setCurrentPage(currentPage);
16         //分页查询
17         ArrayList<book> books=bookbiz.searchAllBook(pb);
18         //获得总页数
19         int pageCount=pb.getTotalPage();
20         //将book集合和页面数跳转至admin.jsp页面
21         req.setAttribute("bookslist", books);
22         req.setAttribute("pagesize", pageCount);
23         req.getRequestDispatcher("web/admin.jsp").forward(req, rep);
24     }
25 }
View Code

 

  BookServlet.java类(用于图书编辑修改等的实现)

  

 1 public class BookServlet extends HttpServlet{
 2     @Override
 3     protected void service(HttpServletRequest req, HttpServletResponse rep) throws ServletException, IOException {
 4         int bookid=Integer.parseInt(req.getParameter("bookid"));
 5         bookBiz bookbiz=new bookBizImpl();
 6         book bk=bookbiz.getBookById(bookid);
 7         if(req.getParameter("method")!=null&&req.getParameter("method").equals("update")) {
 8             int borrow=Integer.parseInt(req.getParameter("borrow"));
 9             String intro=req.getParameter("intro");
10             if(bookbiz.editBook(bookid, intro, borrow)) {
11                 //req.setAttribute("bk", bk);
12                 //req.getRequestDispatcher("bookServlet?bookid="+bookid).forward(req, rep);
13                 PrintWriter out=rep.getWriter();
14                 out.println("success");
15             }
16         }
17         else {
18             //将获取到的book数据发送并跳转至book.jsp页面
19             req.setAttribute("bk", bk);
20             req.getRequestDispatcher("web/book.jsp?bookid="+bookid).forward(req, rep);
21         }
22     }
23 }
View Code

  LogFilter.java类(用于登录过滤实现)

 

 1 public class LogFilter implements Filter{
 2     private FilterConfig config;
 3     @Override
 4     public void destroy() {
 5         // TODO Auto-generated method stub
 6         
 7     }
 8     /*
 9      * Filter的核心处理
10      * */
11     @Override
12     public void doFilter(ServletRequest req, ServletResponse rep, FilterChain filc)
13             throws IOException, ServletException {
14         HttpServletRequest request=(HttpServletRequest) req;
15         HttpServletResponse response=(HttpServletResponse) rep;
16         HttpSession session=request.getSession();
17         //如果session中有logined,则证明过滤成功
18         if(session.getAttribute("logined")!=null) {
19             filc.doFilter(req, rep);
20         }
21         else
22             response.sendRedirect("web/AdminLogin.jsp");
23     }
24 
25     @Override
26     public void init(FilterConfig config) throws ServletException {
27         this.config=config;
28     }
29 
30 }
View Code

 

 

3.数据库设计

  aduser表

  

4.前端JSP设计

  ①AdminLogin.jsp页面

  

 

 

 1 <%@ page language="java" contentType="text/html; charset=utf-8"
 2     pageEncoding="utf-8"%>
 3 <!DOCTYPE html>
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 7 <title>管理员登录页面</title>
 8 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 9 <link rel="stylesheet" href="../css/bootstrap.css">
10 <script type="text/javascript" src="../js/bootstrap.js"></script>
11 <script>
12     
13 </script>
14 </head>
15 <body> 
16 <div class="continer">
17     <div style="margin:0 auto">
18         <h2 class="text-center">图书管理系统</h2>
19         <form class="form-horizontal" role="form" action="/BookSystem/adminlogin" method="post">
20             
21             <div class="form-group">
22              <label for="username" class="col-sm-2 control-label">用户名:</label>
23              <div class="col-sm-5">
24                 <input type="text" class="form-control" name="adname" id="adname" 
25                     placeholder="请输入用户名">
26               </div>
27               </div>
28               <div class="form-group">
29              <label for="password" class="col-sm-2 control-label">密码:</label>
30              <div class="col-sm-5">
31                 <input type="password" class="form-control" name="password" id="password" 
32                     placeholder="请输入密码">
33               </div>
34               </div>
35               <div class="form-group">
36                   <div class="col-sm-offset-2 col-sm-10">
37                       <input type="submit" class="btn btn-default" value="登录"/>
38                   </div>
39               </div>
40        
41         </form>
42     </div>
43 </div>
44 </body>
45 </html>
View Code

 

  ②admin.jsp页面(管理端)

  

 

  1 <%@page import="pojo.PageBean"%>
  2 <%@page import="pojo.book"%>
  3 <%@page import="java.util.ArrayList"%>
  4 <%@page import="biz.impl.bookBizImpl"%>
  5 <%@page import="biz.bookBiz"%>
  6 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
  7 <%@ page language="java" contentType="text/html; charset=utf-8"
  8     pageEncoding="utf-8"%>
  9 <!DOCTYPE>
 10 <html>
 11 <head>
 12 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 13 <title>管理页面</title>
 14 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 15 <link rel="stylesheet" href="${pageContext.request.contextPath}/css/bootstrap.css">
 16 <link rel="stylesheet" href="${pageContext.request.contextPath}/css/bootstrap-theme.css">
 17 <link rel="stylesheet" href="${pageContext.request.contextPath}/css/bootstrap.min.css">
 18 <script type="text/javascript" src="${pageContext.request.contextPath}/js/bootstrap.js"></script>
 19 <script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-3.3.1.js"></script>
 20 </head>
 21 <body>
 22 <div class="container"> 
 23     <div class="row">
 24         <div class="col-sm-12">
 25             <h3 class="text-center">
 26                 图书系统管理员端
 27             </h3>
 28             <div class="row">
 29                 <div class="col-sm-2">
 30                     <div class="btn-group-vertical">
 31                         <button class="btn btn-primary" type="button">书籍管理</button> <button class="btn btn-primary" type="button">添加书籍</button> <button class="btn btn-primary" type="button">用户管理</button>
 32                     </div>
 33                 </div>
 34                 <div class="col-sm-8" id="booklist">
 35                 <table class="table table-striped">
 36                     <thead>
 37                         <tr>
 38                             <th>书籍封面</th>
 39                             <th>书籍名称</th>
 40                             <th>是否借出</th>
 41                             <th>书籍作者</th>
 42                             <th>分类目录</th>
 43                             <th>简介</th>
 44                             <th>操作</th>
 45                         </tr>
 46                     </thead>
 47                     <!-- 03.22采用EL&JSTL进行页面 重构 -->
 48                     <tbody>
 49                         <c:forEach items="${requestScope.bookslist}" var="book">
 50                             <tr>
 51                             <td style="width:12%">
 52                                 <div class="thumbnail" >
 53                                     <img src="http://${book[\'bk_img\']}">
 54                                   </div>
 55                               </td>
 56                               <td>
 57                                   <p id="bookname">${book[\'bk_name\']}</p>
 58                               </td>
 59                               <td>
 60                                   <p>
 61                                   
 62                                   <c:if test="${book[\'bk_borrowed\']}==1">
 63                                       <c:out value="已借出"></c:out>
 64                                   </c:if>
 65                                   <c:if test="${book[\'bk_borrowed\']}==0">
 66                                       <c:out value="未借出"></c:out>
 67                                   </c:if>
 68                                   </p>
 69                               </td>
 70                               <td>
 71                                   <p id="bookname">${book[\'bk_name\']}</p>
 72                               </td>
 73                               <td>
 74                                   <p id="bookname">${bk[\'bk_category\']}</p>
 75                               </td>
 76                               <td>
 77                                   <p id="bookname">${book[\'bk_intro\']}</p>
 78                               </td>
 79                               <td>
 80                                   <div class="btn-group-vertical">
 81                                     <button class="btn btn-primary" type="button">编辑</button> <button 图书管理系统( JSP + JDBC + Servlet )实现-08:页面所有功能实现

图书管理系统( ( JSP + JDBC + Servlet ) )实现-06: 查询所有书籍功能

图书管理系统( JSP + JDBC + Servlet)实现-07:模糊查询功能

图书管理系统( JSP + JDBC + Servlet )实现-01: 流程分析和数据库建表阶段

图书管理系统( ( JSP + JDBC + Servlet ) )实现-04: 建立数据库的实体类(pojo)

图书管理系统( JSP + JDBC + Servlet )实现-02: 编写和配置过滤器(防止页面乱码)