【Eclipse】MVC模式下的图书管理系统
第一次Java web的完整小项目，题目来自2020春季学期Java web开发技术课程设计。
团队成员3人
我负责的是管理端的图书修、删、查找，用户端的图书借阅、图书查找，以及部分可视化页面设计。
非常学生风格的成品，没什么技术含量，就简单纪念一下，因为是合作项目，所以只给出部分内容的思路。
一、CSS+HTML的可视化页面。
因为开发工具的问题，几乎没有涉及JavaScript的使用，所以会使代码看起来繁琐且不专业。
1、登陆后的用户端主页面：
默认显示是新书推荐页面，点击书名也可进行借书。
welcome_user.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Library</title>
<link href="user.css" type="text/css" rel="stylesheet">
</head>
<body>
<%
String user = (String) request.getAttribute("account");
session.setAttribute("account", user);
%>
<div id="header">
<h1 style="margin-bottom: 0;"><%=user%>同学,Welcome to library
</h1>
</div>
<div class="bar">
<ul>
<li><a href="ServletSkip?userdo=newbook&user=<%=user%>" target="menuFrame">
新书推荐
</a></li>
<li><a href="return_reservation.jsp" target="menuFrame">
归还图书
</a></li>
<li><a href="ServletSkip?userdo=query&user=<%=user%>&do=null" target="menuFrame">
借阅图书
</a></li>
<li><a href="#"> 图书分类 </a>
<ul>
<li><a href="ServletSkip?userdo=lit&user=<%=user%>">文学</a></li>
<li><a href="ServletSkip?userdo=nature&user=<%=user%>">科学</a></li>
<li><a href="ServletSkip?userdo=soc&user=<%=user%>">社会</a></li>
<li><a href="ServletSkip?userdo=tec&user=<%=user%>">技术</a></li>
</ul></li>
</ul>
</div>
<div class="new">
<iframe id="menuFrame" name="menuFrame" src="NewBook.jsp"
style="overflow: visible;" scrolling="auto" frameborder="no"
width="100%" height="100%"; float:left"> </iframe>
</div>
<div id="footer">All books are authentic, and the final
interpretation right belongs to the library</div>
</body>
</html>
user.css
@charset "UTF-8";
body{
margin：0;
padding:0;
}
#header{
background-color:#d3abcb;
width:100%;
height:50px;
text-align:center;
top: 0;
}
.new{
background-color:#EEEEEE;
height:700px;
width:100%;
float:left;
}
#footer{
height:10%;
background-color:#866d92;
clear:both;
text-align:center;
}
.bar{
text-align:center;
height:40px;
width:100%;
background:rgb(189, 181, 181);
margin-left: 0;
float:right;
}
.bar ul{
list-style-type: none;
white-space:nowrap;
overflow: hidden;
margin-top: 0;
margin-left:29%;
padding: 0;
}
.bar li {
float:left;
margin-right:2%;
position: relative;
overflow: hidden;
text-align:center;
display:inline;
}
.bar li a{
display: block;
color:white;
padding: 3px;
overflow: hidden;
text-decoration: none;
text-align:center;
}
.bar li a:hover{
background-color: #111;
}
.bar ul li ul{
text-align:center;
margin-left: -0.2px;
background:rgb(193, 176, 187);
position: relative;
display: none;
}
.bar ul li ul li{
float:none;
}
.bar ul li:hover ul{
display: block;
}
NewBook.jsp(涉及到的ServletOperate.java后面有给出)
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style type="text/css">
.new{
background-color:#EEEEEE;
height:100%;
width:100%;
float:left;
}
h1 a{
color:black;
padding: 3px;
overflow: hidden;
text-decoration: none;
}
h2{
color:black;
padding: 3px;
}
img{
height:200px;
width:160px;
border-radius: 8px;
}</style>
<title>Insert title here</title>
</head>
<body>
<div class="new" >
<h1><a href="ServletOperate?indexs=T8561&sort=bno">云边有个小卖部</a></h1>
<h2>【中】张嘉佳</h2>
<img src="timg.jpg"/>
<p>
张嘉佳2018新作，连续三周获得畅销书榜首
云边镇少年刘十三的成长故事。
<h1><a href="ServletOperate?indexs=B7829&sort=bno">没有思想的世界</a></h1>
<h2>【美】富兰克林·福尔（Franklin Foer）</h2>
<img src="aaa.jpg"/>
<p>纽约时报、洛杉矶时报、美国国家公共广播电台年度影响力著作。
<h1><a href="ServletOperate?indexs=S8249&sort=bno">西川美和：围绕电影的X</a></h1>
<h2>【日】西川美和</h2>
<img src="bbb.jpg"/>
<p>囊括日本电影蓝丝带最佳导演奖、横滨电影节最佳导演奖、《电影旬报》年度十佳第一名。
倍受是枝裕和赞誉、当代日本女性导演的翘楚--西川美和，首部中文随笔集。
<h1><a href="ServletOperate?indexs=S4632&sort=bno">朴赞郁的蒙太奇</a></h1>
<h2>【韩】朴赞郁</h2>
<img src="ccc.jpg"/>
<p>本书收录了朴赞郁1997年到2005年间的文章及电影札记，记录了《共同警备区》《我要复仇》《老男孩》《亲切的金子》等重要电影的诞生过程及创作理念，导演对世界的看法，对习以为常现象的思考，对经典电影的剖析都闪烁着独特的智慧。
</div>
</body>
</html>
2、管理端操作主页面
welocme_manager.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style type="text/css">
* {
margin: 0px;
padding: 0px;
}
.header{
text-align: center;
width:100%;
height:75px;
background-color:#d3abcb;
}
.main{
width:100%;
height:1000px;
}
.daohang{
width:15%;
height:100%;
float:left;
background-color:rgb(189, 181, 181);
}
ul{
white-space: nowrap;
overflow: hidden;
text-align: center;
}
li{
overflow: hidden;
margin-bottom:10px;
}
li a{
display: block;
color: white;
text-align: center;
padding: 3px;
overflow: hidden;
text-decoration: none;
}
li a:hover{
background-color: #111;
}
.content{
height:100%;
background-color:#866d92;
}
</style>
</head>
<body>
<div class="header">
<h2>Welcome,manager</h2>
<h3>you can do the following</h3>
</div>
<div class="main">
<div class="daohang"><ul>
<li><a href="#" target="menuFrame">增加图书</a></li>
<li><a href="#" target="menuFrame">删除用户</a></li>
<li><a href="#" target="menuFrame">查询用户</a></li>
<li><a href="#" target="menuFrame">更改图书</a></li>
</ul></div>
<div class="content"><iframe id="menuFrame" name="menuFrame" src="announce_manager.jsp" style=" background-color: #EEEEEE; width:84%; height:1000px; float:right ;frameborder:0">
</iframe></div>
</div>
</body>
</html>
二、管理端对图书的修、删、查找。
1、修删（弊端是：数据库中所有的图书全部列出，优化的话，可以专门分出想要修删的类别）
可视化页面：
change_book.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="object.*"%>
<%@ page import="dao.*"%>
<%@ page import="java.util.*"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>管理员_图书编辑</title>
<style type="text/css">
a:link,a:visited{
text-decoration: none;
color:#0000CD;
display:block;
text-align:center;
background-color:#D4F2E7;
}
a:active,a:hover{
background-color:#00CED1;
}
</style>
</head>
<body>
<h2 align="center">Operate</h2>
<table border="0" bgcolor="#ccceee" align="center">
<tr bgcolor="#CCCCCC" align="center">
<th>书号</th>
<th>书名</th>
<th>作者</th>
<th>价格</th>
<th>简介</th>
<th>操作</th>
<th></th>
</tr>
<%
BookDao bd = new BookDao();
ArrayList<Books> list = bd.findall();
if (list == null || list.size() < 1) {
out.print("没有数据！");
} else {
for (Books book : list) {
%>
<tr align="center" >
<td><%=book.getBno()%></td>
<td><%=book.getBname()%></td>
<td><%=book.getBauthor()%></td>
<td><%=book.getBprice()%></td>
<td><%=book.getBremark()%></td>
<td><a href="ServletBook?do=editbefore&bno=<%=book.getBno()%>">更改</a></td>
<td><a href="ServletBook?do=del&bno=<%=book.getBno()%>">删除</a></td>
</tr>
<%
}
}
%>
</table>
</body>
</html>
edit_book.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="beans.*"%>
<%@ page import="dao.*"%>
<%@ page import="java.util.*"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>编辑书籍</title>
</head>
<body>
<%
//String a =(String)session.getAttribute("editbook");
//BookDao bd = new BookDao();
//Books book=bd.find(a);
Book a =(Book)session.getAttribute("editbook");
String b=""+a.getBprice();
%>
<form action="ServletBookEdit">
<table>
<tr>
<td>书号：</td>
<td><input name="bnoo" value="<%=a.getBno()%>"></td>
</tr>
<tr>
<td>书名：</td>
<td><input name="bname" value="<%=a.getBname() %>"></td>
</tr>
<tr>
<td>作者：</td>
<td><input name="bauthor" value="<%=a.getBauthor() %>"></td>
</tr>
<tr>
<td>价格：</td>
<td><input name="bprice" value="<%=b%>"></td>
</tr>
<tr>
<td>简介：</td>
<td><textarea name="bremark" cols="50" rows="7" ><%=a.getBremark() %></textarea><</td>
</tr>
</table>
<input type="submit" value="修改"></td>
<input type="reset" value="取消"></td>
</form>
</body>
</html>
需要的bean:Books.java
public class Books {
private String Bno;//书号
private String Bname;//书名
private String Bauthor;//作者名
private String Bremark;//简介
private double Bprice;//价格
private int Bbrrow;//借阅状态
private int Breserve;//预约状态
public Books() {
super();
// TODO 自动生成的构造函数存根
}
public Books(String bno, String bname, String bauthor, double bprice, String bremark) {
super();
Bno = bno;
Bname = bname;
Bauthor = bauthor;
Bremark = bremark;
Bprice = bprice;
}
public String getBno() {
return Bno;
}
public void setBno(String bno) {
Bno = bno;
}
public String getBname() {
return Bname;
}
public void setBname(String bname) {
Bname = bname;
}
public String getBauthor() {
return Bauthor;
}
public void setBauthor(String bauthor) {
Bauthor = bauthor;
}
public String getBremark() {
return Bremark;
}
public void setBremark(String bremark) {
Bremark = bremark;
}
public double getBprice() {
return Bprice;
}
public void setBprice(double bprice) {
Bprice = bprice;
}
public int getBbrrow() {
return Bbrrow;
}
public void setBbrrow(int bbrrow) {
Bbrrow = bbrrow;
}
public int getBreserve() {
return Breserve;
}
public void setBreserve(int breserve) {
Breserve = breserve;
}
}
DataConn.java(连接数据库，以下使用不再赘述)
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DataConn {
private static String drivername="com.mysql.cj.jdbc.Driver";
private static String username="root";
private static String password="root";
private static String dbs="lms";
public static Connection getConnection() throws Exception
{
String url1="jdbc:mysql://localhost:3306/"+dbs+"?useSSL=false&serverTimezone=UTC";
try {
Class.forName(drivername);
Connection conn=DriverManager.getConnection(url1,username,password);
return conn;
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
return null;
}
public static void closeConnection(Connection conn,PreparedStatement ptsm,ResultSet rs)
{
try {
if(rs!=null)
rs.close();
if(ptsm!=null)
ptsm.close();
if(conn!=null)
conn.close();
}
catch(SQLException e)
{
e.printStackTrace();
}
}
}
需要的Dao:BookDao.java
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import com.mysql.cj.xdevapi.Result;
import bean.DataConn;
import object.Books;
public class BookDao implements IBookDao {
private static final String PreparedStatement = null;
protected static String sql = "Bno, Bname,Bauthor,Bprice, Bremark,Bbrrow,Breserve";
protected static String delete_sql = "delete from books where Bno=?";
protected static String change_sql = "update books set Bno=?,Bname=?,Bauthor=?,Bprice=?,Bremark=? where Bno=?";
public BookDao() {
super();
// TODO 自动生成的构造函数存根
}
public Books create(Books book) throws Exception {
return null;
}
public Books find(String bno) throws Exception {
Connection conn = null;
Books bs = new Books();
conn = DataConn.getConnection();
Statement ptsm = conn.createStatement();
String select = "select * from books where Bno=" + "'" + bno + "'";
ResultSet rs = ptsm.executeQuery(select);
if (rs.next()) {
bs.setBno(rs.getString(1));
bs.setBname(rs.getString(2));
bs.setBauthor(rs.getString(3));
bs.setBprice(rs.getDouble(4));
bs.setBremark(rs.getString(5));
bs.setBbrrow(rs.getInt(6));
bs.setBreserve(rs.getInt(7));
}
ptsm.close();
rs.close();
conn.close();
return bs;
}
public void delete(String bno) throws Exception {
Connection conn = null;
PreparedStatement ptsm = null;
ResultSet rs = null;
conn = DataConn.getConnection();
ptsm = conn.prepareStatement(delete_sql);
ptsm.setString(1, bno);
ptsm.executeUpdate();
DataConn.closeConnection(conn, ptsm, rs);
}
public void change(Books book) throws Exception {
Connection conn = null;
PreparedStatement ptsm = null;
ResultSet rs = null;
conn = DataConn.getConnection();
ptsm = conn.prepareStatement(change_sql);
ptsm.setString(1, book.getBno());
ptsm.setString(2, book.getBname());
ptsm.setString(3, book.getBauthor());
ptsm.setDouble(4, book.getBprice());
ptsm.setString(5, book.getBremark());
ptsm.setString(6, book.getBno());
int a = ptsm.executeUpdate();
DataConn.closeConnection(conn, ptsm, rs);
}
public ArrayList<Books> findall() throws Exception {
ArrayList<Books> booklist = new ArrayList<Books>();
String sql = "select * from books";
Connection conn = null;
PreparedStatement ptsm = null;
ResultSet rs = null;
conn = DataConn.getConnection();
ptsm = conn.prepareStatement(sql);
rs = ptsm.executeQuery();
try {
while (rs.next()) {
Books u = new Books(rs.getString(1), rs.getString(2), rs.getString(3), rs.getDouble(4),
rs.getString(5));
booklist.add(u);
}
} catch (SQLException e) {
e.printStackTrace();
}
DataConn.closeConnection(conn, ptsm, rs);
return booklist;
}
public ArrayList<Books> findfuzzy(String sort, String indexs) throws Exception {
ArrayList<Books> booklist = new ArrayList<Books>();
Connection conn = null;
Books bs = new Books();
conn = DataConn.getConnection();
String select = "select * from books where " + sort + " like'%" + indexs + "%'";
PreparedStatement pstmt = conn.prepareStatement(select);
ResultSet rs = pstmt.executeQuery();
try {
while (rs.next()) {
Books u = new Books(rs.getString(1), rs.getString(2), rs.getString(3), rs.getDouble(4),
rs.getString(5));
u.setBbrrow(rs.getInt(6));
u.setBbrrow(rs.getInt(7));
booklist.add(u);
}
} catch (SQLException e) {
e.printStackTrace();
}
pstmt.close();
rs.close();
conn.close();
return booklist;
}
}
需要的Servlet:
ServletBook.java
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import dao.BookDao;
import object.Books;
/**
* Servlet implementation class ServletBook
*/
public class ServletBook extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("utf-8");
HttpSession session = request.getSession();
PrintWriter out = response.getWriter();
BookDao bd = new BookDao();
String dos = request.getParameter("do");
if (dos == null || dos.equals("")) {
dos = "index";
}
if (dos.equals("index")) {
response.sendRedirect("change_book.jsp");
}
if (dos.equals("del")) {
String bno = request.getParameter("bno");
try {
bd.delete(bno);
out.print("");
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
if (dos.equals("editbefore")) {
try {
String kkk = request.getParameter("bno");
Books bs=new Books();
bs = bd.find(kkk);
session.setAttribute("editbook", bs);
response.sendRedirect("edit_book.jsp");
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
ServleBooktEdit.java
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import dao.BookDao;
import object.Books;
/**
* Servlet implementation class ServletBookEdit
*/
public class ServletBookEdit extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("utf-8");
HttpSession session = request.getSession();
PrintWriter out = response.getWriter();
BookDao bd = new BookDao();
String bno = request.getParameter("bnoo");
String bname = request.getParameter("bname");
String ba = request.getParameter("bauthor");
String bp = request.getParameter("bprice");
Double b2 = Double.parseDouble(bp);
String br = request.getParameter("bremark");
Books bs = new Books(bno, bname, ba, b2, br);
bs.setBbrrow(1);
bs.setBreserve(1);
try {
bd.change(bs);
out.print("");
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
2、查找
模糊查找很粗暴，作者、书名或书号。
query_book.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>查询书籍提交界面</title>
</head>
<body>
<center>
<form action="ServletSelectBook">
<input type="text" name="indexs" size="30"><br>
<input name="sort" value="bno" type="radio" checked />书号
<input name="sort" value="bname" type="radio">书名
<input name="sort" value="bauthor" type="radio">作者<br>
<input type="submit" value="查询">
<input type="reset" value="取消">
</form>
</center>
</body>
</html>
query_result.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="beans.*"%>
<%@ page import="dao.*"%>
<%@ page import="java.util.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>查询书籍显示结果界面</title>
</head>
<body>
<%
String a = (String) session.getAttribute("s");
String b = (String) session.getAttribute("result");
BookDao bd = new BookDao();
ArrayList<Book> Book = bd.findfuzzy(a, b);
if (Book == null || Book.size() < 1) {
out.print("没有数据！");
} else {
for (Book book : Book) {
%>
<h1>
《<%=book.getBname()%>》
</h1>
<h2>
书号：<%=book.getBno()%></h2>
<h2>
作者：<%=book.getBauthor()%></h2>
<h2>
价格：<%=book.getBprice()%></h2>
<p>
简介：
<%=book.getBremark()%></p>
<%
}
}
%>
</body>
</html>
需要的bean:Books.java BookDao.java
需要的Dao:DataConn.java
需要的servlet：ServletOperate.java
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import dao.BookDao;
import object.Books;
/**
* Servlet implementation class ServletOperate
*/
public class ServletOperate extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("utf-8");
HttpSession session = request.getSession();
String sort = request.getParameter("sort");
String indexs=request.getParameter("indexs");
String t=(String)getServletContext().getAttribute("usersno");
if (sort == null || sort.equals("")) {
response.sendRedirect("query_book.jsp");
}
else {
if(sort.equals("bno"))
try {
String s="Bno";
session.setAttribute("s", s);
} catch (Exception e) {
e.printStackTrace();
}
if (sort.equals("bname")) {
try {
String s="Bname";
session.setAttribute("s", s);
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
if (sort.equals("bauthor")) {
try {
String s="Bauthor";
session.setAttribute("s", s);
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
session.setAttribute("result", indexs);
session.setAttribute("xh", t);
response.sendRedirect("query_result.jsp");
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
三、用户端的查找与借书
在此之前，需要把登录端成功提交的用户名传值到ServletSkip.java中
登录端的可视化页面就不放出来了，servlet如下
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* Servlet implementation class ServletSkip
*/
public class ServletSkip extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("utf-8");
HttpSession session = request.getSession();
PrintWriter out = response.getWriter();
String userdos=request.getParameter("userdo");
String sno=request.getParameter("user");
if(userdos.equals("query"))
{
//session.setAttribute("usersno", sno);
session.getServletContext().setAttribute("usersno",sno);
response.sendRedirect("query_book.jsp");
}
if(userdos.equals("newbook"))
{
//session.setAttribute("usersno", sno);
session.getServletContext().setAttribute("usersno",sno);
response.sendRedirect("NewBook.jsp");
}
if(userdos.equals("nature"))
{
//session.setAttribute("usersno", sno);
session.getServletContext().setAttribute("usersno",sno);
response.sendRedirect("nature.jsp");
}
if(userdos.equals("lit"))
{
//session.setAttribute("usersno", sno);
session.getServletContext().setAttribute("usersno",sno);
response.sendRedirect("literature.jsp");
}
if(userdos.equals("soc"))
{
//session.setAttribute("usersno", sno);
session.getServletContext().setAttribute("usersno",sno);
response.sendRedirect("society.jsp");
}
if(userdos.equals("tec"))
{
//session.setAttribute("usersno", sno);
session.getServletContext().setAttribute("usersno",sno);
response.sendRedirect("technology.jsp");
}
if(userdos.equals("")||userdos==null) {
out.println("网页错误");
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
1、查找
比管理端的模糊查找多了分类查找，可以根据书号的编写方法，分别查找文学、科学、社会、技术类别的书籍
每一大类还有许多小类，可根据图书简介下的借书状态，判断是否要借
例如：文学（literature.jsp）
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style type="text/css">
* {
margin: 0px;
padding: 0px;
}
.main{
width: 100%;
height: 1000px;
background-color:red;
float: left;
}
.daohang{
width: 10%;
float:left;
height: 100%;
background-color:rgb(189, 181, 181);
}
ul{
white-space: nowrap;
overflow: hidden;
text-align: center;
}
li{
overflow: hidden;
margin-bottom:10px;
}
li a{
display: block;
color: white;
text-align: center;
padding: 3px;
overflow: hidden;
text-decoration: none;
}
li a:hover{
background-color: #111;
}
.yemian{
height: 100%;
background-color:#EEEEEE;
}
</style>
</head>
<body>
<div class="main">
<div class="daohang">
<ul>
<li><a href="ServletOperate?indexs=S&sort=bno" target="menuFrame">散文</a></li>
<li><a href="ServletOperate?indexs=X&sort=bno" target="menuFrame">古典</a></li>
<li><a href="ServletOperate?indexs=Z&sort=bno" target="menuFrame">通俗</a></li>
<li><a href="ServletOperate?indexs=T&sort=bno" target="menuFrame">纪实</a></li>
</ul>
</div>
<div class="yemian">
<iframe id="menuFrame" name="menuFrame" src="" style=" background-color: #adb9cd; width:89.5%; height:1000px; float:right ;frameborder:0">
</iframe>
</div>
</div>
</body>
</html>
需要的bean、servlet如上所示
2、借书
借书时会直接跳转至模糊查找的界面：
这里的query_book.jsp、servlet、bean、dao与管理端的相同
这里更改一下的query_result.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="beans.*"%>
<%@ page import="dao.*"%>
<%@ page import="java.util.*"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style type="text/css">
body {
background-color: #EEEEEE;
text-align: center;
}
a {
display: block;
color: black;
text-align: center;
padding: 5px;
margin: 10px;
overflow: hidden;
text-decoration: none;
background-color: white
}
a:active, a:hover {
background-color: #C5E3E3
}
</style>
</head>
<body>
<%
String d = (String) session.getAttribute("xh");
%>
<h1><%=d%></h1>
<%
String a = (String) session.getAttribute("s");
String b = (String) session.getAttribute("result");
BookDao bd = new BookDao();
ArrayList<Book> Book = bd.findfuzzy(a, b);
if (Book == null || Book.size() < 1) {
out.print("没有数据！");
} else {
for (Book book : Book) {
%>
<h1>
《<%=book.getBname()%>》
</h1>
<h2>
书号：<%=book.getBno()%></h2>
<h2>
作者：<%=book.getBauthor()%></h2>
<h2>
价格：<%=book.getBprice()%></h2>
<p>
简介：
<%=book.getBremark()%></p>
<%
if (book.getBborrow() == 0) {
%>
<a href="ServletBorrow?sno=<%=d%>&bno=<%=book.getBno()%>">借书</a>
<%
} else {
%>
<a href="#">已出借</a>
<%
}
}
}
%>
</body>
</html>
增加的ServletBorrow.java：
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import dao.BookDao;
import dao.SBBDao;
import dao.StudentDao;
import dao.TimeDao;
import object.Books;
import object.SBB;
import object.Student;
/**
* Servlet implementation class ServletBorrow
*/
public class ServletBorrow extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("utf-8");
HttpSession session = request.getSession();
String sno=request.getParameter("sno");
String bno=request.getParameter("bno");
StudentDao sd=new StudentDao();
SBBDao sbbd=new SBBDao();
BookDao bd=new BookDao();
Student stu=new Student();
Date d = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(d);
int year=calendar.get(Calendar.YEAR);
int month=calendar.get(Calendar.MONTH);
int day=calendar.get(Calendar.DATE);
int hour=calendar.get(Calendar.HOUR_OF_DAY);
int minute=calendar.get(Calendar.MINUTE);
int second=calendar.get(Calendar.SECOND);
TimeDao td=new TimeDao(year,month,day,hour,minute,second);
String sbb1=td.SBB1();
String sbb2=td.SBB2();
SBB sb=new SBB(sno,bno,sbb1,"0",sbb2,0);
try {
stu=sd.find(sno);
Books bs=bd.find(bno);
int m=stu.getSborrow();
if(m<8)
{
bs.setBbrrow(0);
bs.setBreserve(0);
bd.change(bs);
sbbd.Insert(sb);
stu.setSborrow(m+1);
sd.change(stu);
session.setAttribute("student", stu);
response.sendRedirect("borrow_success.jsp");
}
else {
response.sendRedirect("borrow_fail.jsp");
}
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
这里还需给出dao：TimeDao.java(用来计算应还的日期)
public class TimeDao {
private int year;
private int month;
private int day;
private int hour;
private int minute;
private int second;
public TimeDao() {
super();
// TODO 自动生成的构造函数存根
}
public TimeDao(int year, int month, int day, int hour, int minute, int second) {
super();
this.year = year;
this.month = month;
this.day = day;
this.hour = hour;
this.minute = minute;
this.second = second;
}
public int getYear() {
return year;
}
public void setYear(int year) {
this.year = year;
}
public int getMonth() {
return month;
}
public void setMonth(int month) {
this.month = month;
}
public int getDay() {
return day;
}
public void setDay(int day) {
this.day = day;
}
public int getHour() {
return hour;
}
public void setHour(int hour) {
this.hour = hour;
}
public int getMinute() {
return minute;
}
public void setMinute(int minute) {
this.minute = minute;
}
public int getSecond() {
return second;
}
public void setSecond(int second) {
this.second = second;
}
public int Runnian()
{
if(year%100!=0&&year%4==0)
{
return 1;
}
else { return 0;}
}
public String SBB1()
{
String sbb1=year+"-"+month+"-"+day;
return sbb1;
}
public String SBB2()
{
int year2;
int month2;
int day2;
int[] time={31,28,31,30,31,30,31,31,30,31,30,31};
if(Runnian()==1)
{
time[1]=29;
}else {
time[1]=28;
}
if(month==12)
{
month2=1;
year2=year+1;
day2=day;
}
else {
if(time[month]<31)
{
if(day==31)
{
month2=month+2;
day2=day-time[month];
}
else {
month2=month+1;
day2=day;
}
}
else {
month2=month+1;
day2=day;
}
year2=year;
}
return year2+"-"+month2+"-"+day2;
}
}
以及Bean:StudentDao.java(查找、更改学生的借书的本数)
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import beans.JdbcUtil;
import beans.Student;
public class StudentDao {
protected static String change_sql = "update Students set Sborrow=? where Sno=?";
public Student find(String sno) throws Exception {
Connection conn = null;
Student bs = new Student();
conn = JdbcUtil.getConnection();
Statement ptsm = conn.createStatement();
String select="select * from students where Sno='"+sno+"'";
ResultSet rs = ptsm.executeQuery(select);
if (rs.next()) {
bs.setSno(rs.getString(1));
bs.setSname(rs.getString(2));
bs.setSclass(rs.getInt(3));
bs.setSgrade(rs.getInt(4));
bs.setSprofession(rs.getString(5));
bs.setSborrow(rs.getInt(6));
}
ptsm.close();
rs.close();
conn.close();
return bs;
}
public void change(Student stu) throws Exception {
Connection conn = null;
PreparedStatement ptsm = null;
ResultSet rs = null;
conn =JdbcUtil.getConnection();
ptsm = conn.prepareStatement(change_sql);
ptsm.setInt(1, stu.getSborrow());
ptsm.setString(2, stu.getSno());
int n=ptsm.executeUpdate();
JdbcUtil.free(rs, ptsm, conn);
}
}
SBBDao.java（增添学生借书的记录）
import java.sql.Connection;
import java.sql.PreparedStatement;
import beans.JdbcUtil;
import beans.SBB;
public class SBBDao {
public void Insert(SBB b) throws Exception {
Connection conn=null;
conn =JdbcUtil.getConnection();
String sql="insert into SBB(Sno,Bno,Brodate,Retdate,SRetdate,Reborrow) values(?,?,?,?,?,?);";
PreparedStatement ptsm= conn.prepareStatement(sql);
ptsm.setString(1, b.getSno());
ptsm.setString(2,b.getBno());
ptsm.setString(3, b.getBrodate());
ptsm.setString(4, b.getRetdate());
ptsm.setString(5,b.getSRetdate());
ptsm.setInt(6, b.getReborrow());
int n=ptsm.executeUpdate();
JdbcUtil.free(null, ptsm, conn);
}
}
若学生已借书的本数小于8本，则跳转至成功页面（borrow_success.jsp），否则跳转至失败页面（borrow_fail.jsp）
borrow_success.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="beans.*"%>
<%@ page import="dao.*"%>
<%@ page import="java.util.*"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
Student s = (Student) session.getAttribute("student");
%>
<h1 align="center"><%=s.getSname()%>借书成功！</h1>
</body>
</html>
borrow_fail.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1 align="center">您已达导借书数量最大限度！</h1>
<h1 align="center">抱歉借书失败！！！</h1>
</body>
</html>