目录
一、系统介绍
1.开发的环境
2.本系统实现的功能
3.数据库用到的表
4.工程截图
二、系统展示
1.登录页面
2.注册页面
3.管理员主页面
编辑
4. 用户主页面
5.图书管理页面（管理员）
6.读者管理页面（管理员）
编辑 7.图书分类管理页面（管理员）
8.图书借阅管理页面（管理员）
9.图书归还信息页面（管理员）
10.图书日志查询（管理员）
编辑
11. 图书借阅页面（用户）
12.还书页面（用户）
编辑 13.借阅历史页面（用户）
三、部分代码展示
AdminDao.java
LoginServlet.java
RegisterServlet.java
BookBean.java
AdminServlet.java
四、源码
点击以下链接（内含数据库文件——books.sql）：
五、备注
六、祝福
一、系统介绍
1.开发的环境
开发工具：eclipse 2022
JDK版本：1.8
数据库：MySQL 5.5
数据库管理软件：Navicat 15.0.27
服务器：apach-tomcat-9.0.68
2.本系统实现的功能
管理员功能：登陆系统、用户信息的增删改查、图书的增删改查、图书分类的增删改查、图书日志查询、图书归还。
用户功能：登陆系统、查阅图书、借阅和归还图书、查询借阅记录
3.数据库用到的表
admin、book、booktype、history
4.工程截图
二、系统展示
1.登录页面
2.注册页面
3.管理员主页面
4. 用户主页面
5.图书管理页面（管理员）
6.读者管理页面（管理员）
7.图书分类管理页面（管理员）
8.图书借阅管理页面（管理员）
9.图书归还信息页面（管理员）
10.图书日志查询（管理员）
11. 图书借阅页面（用户）
12.还书页面（用户）
13.借阅历史页面（用户）
三、部分代码展示
AdminDao.java
package com.hry.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import com.hry.bean.AdminBean;
import com.hry.dbUtils.DbUtil;
public class AdminDao {
/**
* 登录验证功能，传入用户名和密码，在数据库中查找，如果找到了，返回true，没找到则返回false
* username、password
*/
public boolean Login_verify(String username,String password){
//连接数据库
DbUtil dbUtil=new DbUtil();
Connection conn = dbUtil.getConn();
//sql语句
String sql = "select * from admin where username='"+username+"' and password='"+password+"'";
PreparedStatement stm = null;
ResultSet rs = null;
try {
//预编译SQL，减少sql执行
stm = conn.prepareStatement(sql);
rs = stm.executeQuery();
if(rs.next()){
return true;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally {
DbUtil.CloseDB(rs, stm, conn);
}
return false;
}
/**
* 注册账号的函数，传入账号，密码，姓名，邮箱，手机号，借阅天数，可借阅数
* username, password, name, email, phone, lend_num, max_num
*/
public void Register(String username, String password, String name, String email, String phone,int lend_num,int max_num) {
// TODO Auto-generated method stub
//连接数据库
DbUtil dbUtil=new DbUtil();
Connection conn = dbUtil.getConn();
//sql语句
String sql = "insert into admin(status,username,password,name,email,phone,lend_num,max_num) values(?,?,?,?,?,?,?,?)";
int rs = 0;
PreparedStatement stm = null;
try {
//预编译SQL，减少sql执行
stm = conn.prepareStatement(sql);
//传参
stm.setInt(1, 1);
stm.setString(2, username);
stm.setString(3, password);
stm.setString(4, name);
stm.setString(5, email);
stm.setString(6, phone);
stm.setInt(7, lend_num);//借阅天数
stm.setInt(8, max_num);//可借阅数
//执行更新
rs = stm.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 根据传入的账号，密码，来查找对应的读者信息，返回一个AdminBean类型，
*
*/
public AdminBean getAdminInfo(String username, String password) {
// TODO Auto-generated method stub
AdminBean adminbean = new AdminBean();
DbUtil dbUtil=new DbUtil();
Connection conn = dbUtil.getConn();
String sql = "select * from admin where username='"+username+"' and password='"+password+"'";
PreparedStatement stm = null;
ResultSet rs = null;
try {
//预编译SQL，减少sql执行
stm = conn.prepareStatement(sql);
//执行查询
rs = stm.executeQuery();
if(rs.next()){
//传参
adminbean.setAid(rs.getInt("aid"));
adminbean.setUsername(rs.getString("username"));
adminbean.setName(rs.getString("name"));
adminbean.setPassword(rs.getString("password"));
adminbean.setEmail(rs.getString("email"));
adminbean.setPhone(rs.getString("phone"));
adminbean.setStatus(rs.getInt("status"));
adminbean.setLend_num(rs.getInt("lend_num"));
adminbean.setMax_num(rs.getInt("max_num"));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally {
DbUtil.CloseDB(rs, stm, conn);
}
return adminbean;
}
/**
* 获取全部用户的信息，其中sql语句中的status=1，表示只查找读者(1)，不显示管理员(2)的
*
*/
public ArrayList<AdminBean> get_ListInfo(){
ArrayList<AdminBean> tag_Array = new ArrayList<AdminBean>();
Connection conn = DbUtil.getConn();
String sql = "select * from admin where status=1";
PreparedStatement stm = null;
ResultSet rs = null;
try {
stm = conn.prepareStatement(sql);
rs = stm.executeQuery();
while(rs.next()){
AdminBean adminbean = new AdminBean();
adminbean.setAid(rs.getInt("aid"));
adminbean.setUsername(rs.getString("username"));
adminbean.setName(rs.getString("name"));
adminbean.setPassword(rs.getString("password"));
adminbean.setEmail(rs.getString("email"));
adminbean.setPhone(rs.getString("phone"));
adminbean.setStatus(rs.getInt("status"));
adminbean.setLend_num(rs.getInt("lend_num"));
adminbean.setMax_num(rs.getInt("max_num"));
tag_Array.add(adminbean);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally {
DbUtil.CloseDB(rs, stm, conn);
}
return tag_Array;
}
/**
* 根据传入的aid图书号，查找到对应的读者的全部信息，返回一个AdminBean类型的数据，与上一个相似，只是aid的类型为String，
*
*/
public AdminBean get_AidInfo2(String aid){
AdminBean adminbean = new AdminBean();
DbUtil dbUtil=new DbUtil();
Connection conn = dbUtil.getConn();
String sql = "select * from admin where aid="+aid;
PreparedStatement stm = null;
ResultSet rs = null;
try {
stm = conn.prepareStatement(sql);
rs = stm.executeQuery();
if(rs.next()){
adminbean.setAid(rs.getInt("aid"));
adminbean.setUsername(rs.getString("username"));
adminbean.setName(rs.getString("name"));
adminbean.setPassword(rs.getString("password"));
adminbean.setEmail(rs.getString("email"));
adminbean.setPhone(rs.getString("phone"));
adminbean.setStatus(rs.getInt("status"));
adminbean.setLend_num(rs.getInt("lend_num"));
adminbean.setMax_num(rs.getInt("max_num"));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally {
DbUtil.CloseDB(rs, stm, conn);
}
return adminbean;
}
/**
* 修改读者的信息
*/
public void updateUser(int aid, String username, String password, String name, String email, String phone,
int lend_num, int max_num) {
// TODO Auto-generated method stub
DbUtil dbUtil=new DbUtil();
Connection conn = dbUtil.getConn();
String sql = "update admin set username=?,name=?,email=?,phone=?,password=?,lend_num=?,max_num=? where aid=?";
PreparedStatement stm = null;
try {
stm = conn.prepareStatement(sql);
stm.setString(1, username);
stm.setString(2, name);
stm.setString(3, email);
stm.setString(4, phone);
stm.setString(5, password);
stm.setInt(6, lend_num);
stm.setInt(7, max_num);
stm.setInt(8, aid);
stm.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 删除用户的信息，根据传入的aid作为条件
*
*/
public void deleteUser(int aid) {
// TODO Auto-generated method stub
DbUtil dbUtil=new DbUtil();
Connection conn = dbUtil.getConn();
String sql = "delete from admin where aid=?";
PreparedStatement stm = null;
try {
stm = conn.prepareStatement(sql);
stm.setInt(1, aid);
stm.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
LoginServlet.java
package com.hry.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.SQLException;
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 javax.servlet.http.HttpSession;
import com.hry.bean.AdminBean;
import com.hry.dao.AdminDao;
/**
* Servlet implementation class LoginServlet
*/
@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
AdminDao userdao = new AdminDao();
AdminDao admindao = new AdminDao();
/**
* @see HttpServlet#HttpServlet()
*/
public LoginServlet() {
super();
// TODO Auto-generated constructor stub
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//登录的判断
//编码格式
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
//获取账号和密码
// PrintWriter out = response.getWriter();
String username = request.getParameter("username");
String password = request.getParameter("password");
System.out.println(username);
//对账号和密码进行判断
boolean result = userdao.Login_verify(username, password);
System.out.println(result);
HttpSession session = request.getSession();
//判断输入正确
if(result){
AdminBean adminbean = new AdminBean();
//更加账号和密码查找出读者的信息
adminbean = admindao.getAdminInfo(username,password);
//将aid存入session中
session.setAttribute("aid", ""+adminbean.getAid());
//设置session的失效时间
session.setMaxInactiveInterval(6000);
//根据status的值来判断是管理员，还是读者，status=1为读者
System.out.println(adminbean.getStatus());
if(adminbean.getStatus()==1){
response.sendRedirect("index2.jsp");
}else{
response.sendRedirect("admin.jsp");
}
}else{
//没有找到对应的账号和密码，返回重新登录
session.setAttribute("state", "密码错误");
response.sendRedirect("login.jsp");
}
}
}
RegisterServlet.java
package com.hry.servlet;
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.hry.bean.AdminBean;
import com.hry.dao.AdminDao;
/**
* Servlet implementation class RegisterServlet
*/
@WebServlet("/RegisterServlet")
public class RegisterServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public RegisterServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
/**
* @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);
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
//获取注册信息
AdminDao userdao = new AdminDao();
String username = request.getParameter("username");
String password = request.getParameter("password");
String name = request.getParameter("name");
String email = request.getParameter("email");
String phone = request.getParameter("phone");
System.out.println(username);
//默认设置最大借阅数和借阅天数
int lend_num = 30;
int max_num = 5;
//将注册信息存入数据库，再返回登录
userdao.Register(username,password,name,email,phone,lend_num,max_num);
response.sendRedirect("login.jsp");
}
}
BookBean.java
package com.hry.bean;
public class BookBean {
/**
* 图书的数据表的bean
*/
private int bid;//图书id
private String name;//图书名称
private String card;//图书号
private String autho;//作者
private int num;//图书数量
private String type;//图书的分类
private String press;//出版社
public int getBid() {
return bid;
}
public void setBid(int bid) {
this.bid = bid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCard() {
return card;
}
public void setCard(String card) {
this.card = card;
}
public String getAutho() {
return autho;
}
public void setAutho(String autho) {
this.autho = autho;
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getPress() {
return press;
}
public void setPress(String press) {
this.press = press;
}
}
AdminServlet.java
package com.hry.servlet;
import java.io.IOException;
import java.io.PrintWriter;
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 javax.servlet.http.HttpSession;
import com.hry.bean.AdminBean;
import com.hry.dao.AdminDao;
import com.hry.dao.BookDao;
/**
* Servlet implementation class AdminServlet
*/
@WebServlet("/AdminServlet")
public class AdminServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public AdminServlet() {
super();
// TODO Auto-generated constructor stub
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//PrintWriter:输出流，为异常处理
PrintWriter out = response.getWriter();
//设置编码类型
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
BookDao bookdao = new BookDao();
//这里为了简单，设置了tip，用来区分是修改密码功能，还是修改个人资料的功能，tip=1为修改密码
int tip = Integer.parseInt(request.getParameter("tip"));
//获取发起请求页面的文件名称，这个在对应的jsp里面的表单填写，修改完成后就可以直接返回对应的页面
String url = request.getParameter("url");
System.out.println(url);
HttpSession session = request.getSession();
AdminBean adminbean = new AdminBean();
//获取存到session的aid
String aid = (String) session.getAttribute("aid");
AdminDao admindao = new AdminDao();
//通过aid获取到读者的信息
adminbean = admindao.get_AidInfo2(aid);
//修改密码
if (tip==1) {
//获取到输入的旧密码，新密码
String password = request.getParameter("password");
String password2 = request.getParameter("password2");
//获取读者数据表中的密码
String old_password = adminbean.getPassword();
//对旧密码进行比较，如果相同就修改，不相同就直接退出
if(old_password.equals(password)){
admindao.updateUser(adminbean.getAid(), adminbean.getUsername(), password2, adminbean.getName(),
adminbean.getEmail(), adminbean.getPhone(), adminbean.getLend_num(), adminbean.getMax_num());
response.sendRedirect(url+".jsp");
}else{
out.write("<script type='text/javascript'>alert('password error');location.href='"+url+".jsp'; </script>");
}
} else {
//修改个人资料
//获取输入的信息
String name = request.getParameter("name");
String email = request.getParameter("email");
String phone = request.getParameter("phone");
//修改输入的信息到数据表中
admindao.updateUser(adminbean.getAid(), adminbean.getUsername(), adminbean.getPassword(), name,
email, phone, adminbean.getLend_num(), adminbean.getMax_num());
response.sendRedirect(url+".jsp");
}
}
}
四、源码
点击以下链接（内含数据库文件——books.sql）：
链接：https://pan.baidu.com/s/1HN8CY281ctJWjSkynUgxag?pwd=5ugw
提取码：5ugw
五、备注
该项目是基于一位GitHub上的大佬的项目模板写的，我在上课时按照老师的要求给原项目增加和优化了一些功能，最后变成了现在这个样子。由于当时在GitHub参考了很多的项目，导致我现在已经不记得那位大佬的用户名了，只能说是非常抱歉了。
如有侵权，请联系我删除。
六、祝福
路虽远行则可至，未来一定可期！祝您生活愉快、工作顺心、学业有成！
