jdbc实现图书馆借阅系统

网友投稿 406 2023-01-13


jdbc实现图书馆借阅系统

前言

每位在学校学java的同学在期末会有java课程设计,而选题很可能就是图书管理系统,此篇文章可以帮助到你。能力有限,代码有bug可以下方的评论区指明

简介

图书馆管理系统分为用户登录和管理员登录,整个系统的控制是在控制台下进行操作的。

用户层

用户可以进行注册,登录,借书,查书,密码修改,还书等功能。

管理员层

管理员可以进行对管理书籍包括新书上架,修改库存信息等功能。

系统本身

系统本身可以根据用户是否逾期进行锁定禁止借书的功能等。

需要掌握的java知识

java基础语法,容器(list),jdbc,sql语句。

po层代码

/**

*

* 对数据库的操作进行单独处理,更多的逻辑更改在更高的逻辑层编写。降低耦合

*

*/

public class LibararyDao {

/**

* 注册图书

* @param user 注册图书信息

* @return

*/

public boolean addBook(Bookinfo bookinfo){

try {

Connection con =JDBCutil.creatConnection();

String sql = "insert into bookinfo (bookname,zuozhe,shuliang,shengyushuliang,date)"

+ " values (?,?,?,?,?) ";

PreparedStatement pre =con.prepareStatement(sql);

pre.setString(1, bookinfo.getBookname());

pre.setString(2, bookinfo.getZuozhe());

pre.setInt(3, bookinfo.getShuliang());

pre.setInt(4, bookinfo.getShuliang());

pre.setDate(5, new java.sql.Date(bookinfo.getData().getTime()));

pre.execute();

} catch (SQLException e) {

System.out.println("图书注册失败");

e.printStackTrace();

return false;

}

return true;

}

/**

* 注册账号

* @param user 注册信息

* @return

*/

public boolean addUser(User user){

try {

Connection con =JDBCutil.creatConnection();

String sql = "insert into userinfo (username,password,books) values (?,?,0) ";

PreparedStatement pre =con.prepareStatement(sql);

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

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

pre.execute();

} catch (SQLException e) {

System.out.println("注册失败");

e.printStackTrace();

return false;

}

return true;

}

/**

* 查询用户

* @param user 信息

* @return

*/

public ResultSet queryUser(User user){

try {

Connection con =JDBCutil.creatConnection();

String sql = "select * from userinfo where username = ? ";

PreparedStatement pre;

pre = con.prepareStatement(sql);

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

ResultSet r =pre.executeQuery();

return r;

} catch (SQLException e) {

System.out.println("查询失败");

e.printStackTrace();

return null;

}

}

/**

* 更新持有书

* @param user 信息

* @return

*/

public boolean updateUserbooks(User user){

try {

Connection con =JDBCutil.creatConnection();

String sql = "update userinfo set books = ? where username = ? ";

PreparedStatement pre;

pre = con.prepareStatement(sql);

pre.setInt(1, user.getBooks());

pre.setString(2, user.getUsername());

int r =pre.executeUpdate();

if(r>0){

return true;

}else{

return false;

}

} catch (SQLException e) {

System.out.println("查询失败");

e.printStackTrace();

return false;

}

}

/**

* 借书表中插入

* @param username 借书人

* @param bookname 书名

* @return

*/

public boolean addborrowinfo(String username,String bookname){

try {

Connection con =JDBCutil.creatConnection();

String sql = "insert into borrowinfo (username,bookname,borrowdate,returndate)"

+ " values (?,?,?,?) ";

PreparedStatement pre;

pre = con.prepareStatement(sql);

pre.setString(1, username);

pre.setString(2, bookname);

pre.setDate(3, new java.sql.Date(new Date().getTime()));

pre.setDate(4, new java.sql.Date(DateUtil.addMonth(new Date()).getTime()));

pre.execute();

} catch (SQLException e) {

System.out.println("借书失败");

e.printStackTrace();

return false;

}

return true;

}

/**

* 查书

* @param bookname 书名

* @return

*/

public ResultSet queryBook(String bookname){

try {

Connection con =JDBCutil.creatConnection();

String sql = "select * from bookinfo where bookname ='"+bookname+"'";

PreparedStatement pre;

pre = con.prepareStatement(sql);

ResultSet r =pre.executeQuery();

return r;

}

catch (SQLException e) {

System.out.println("借书失败");

e.printStackTrace();

return null;

}}

/**

* 查询所有的书籍

* @return

*/

public ResultSet queryAllBook(){

try {

Connection con =JDBCutil.creatConnection();

String sql = "select * from bookinfo ";

PreparedStatement pre;

pre = con.prepareStatement(sql);

ResultSet r =pre.executeQuery();

return r;

}

catch (SQLException e) {

System.out.println("借书失败");

e.printStackTrace();

return null;

}

}

/**

* 分页

* @param page

* @return

*/

public ResultSet querySubBookInfo(int page){

try {

Connection con =JDBCutil.creatConnection();

PreparedStatement pre;

String sql = "select * from bookinfo limit ?,5 ";

pre = con.prepareStatement(sql);

pre.setInt(1, page);

ResultSet r =pre.executeQuery();

return r;

}

catch (SQLException e) {

System.out.println("借书失败");

e.printStackTrace();

return null;

}

}

/**

* 数据页数 五条数据为一组

* @return

*/

public int queryPageInfo(){

try {

int zongshu = 0;

Connection con =JDBCutil.creatConnection();

String sql1 = "select count(id) as cou from bookinfo ";

Statement sta =con.createStatement();

ResultSet res =sta.executeQuery(sql1);

if(res.next())

{

zongshu = res.getInt("cou");

if(zongshu == 0)return 0;

}

int a =0;

if(zongshu%5==0){

a = zongshu/5;

}else{

a = zongshu/5+1;

}

return a;

}

catch (SQLException e) {

System.out.println("借书失败");

e.printStackTrace();

return -1;

}

}

TbDZW

/**

* 更新剩余数量

* @param bookname 书名

* @param sysl 数量

* @return

*/

public boolean updateBookinfo(String bookname,int sysl){

try {

Connection con =JDBCutil.creatConnection();

String sql = "update bookinfo set shengyushuliang = ? where bookname = ?";

PreparedStatement pre;

pre = con.prepareStatement(sql);

pre.setInt(1,sysl);

pre.setString(2, bookname);

int r =pre.executeUpdate();

if(r>0){

return true;

}else{

return false;

}

} catch (SQLException e) {

System.out.println("借书失败");

e.printStackTrace();

return false;

}

}

/*public boolean queryBook(String...strings){

try {

Connection con =JDBCutil.creatConnection();

String sql = "select bookname from bookinfo where 1=1 ";

PreparedStatement pre;

pre = con.prepareStatement(sql);

ResultSet r =pre.executeQuery();

if(r.next()){

return true;

}else{

return false;

}

} catch (SQLException e) {

System.out.println("借书失败");

e.printStackTrace();

return false;

}*/

/**

* 查询用户的所有的借阅信息

* @param username

* @return

*/

public ResultSet queryBorrowinfo(String username){

try {

Connection con =JDBCutil.creatConnection();

String sql = "select * from borrowinfo where username = '"+username+"'";

PreparedStatement pre = con.prepareStatement(sql);

ResultSet r =pre.executeQuery();

return r;

} catch (SQLException e) {

System.out.println("查询失败");

e.printStackTrace();

return null;

}

}

/**

* 查询借阅信息

* @param username

* @return

*/

public ResultSet queryBorrowinfo(String username,String bookname){

try {

Connection con =JDBCutil.creatConnection();

String sql = "select * from borrowinfo where username = ? and bookname = ?";

PreparedStatement pre = con.prepareStatement(sql);

pre.setString(1, username);

pre.setString(2, bookname);

ResultSet r =pre.executeQuery();

return r;

} catch (SQLException e) {

System.out.println("查询失败");

e.printStackTrace();

return null;

}

}

/**

* 删除借书

* @param username 人名

* @param bookname 书名

* @return

*/

public boolean deleteBorrowInfo(String username,String bookname){

try {

Connection con =JDBCutil.creatConnection();

String sql = "delete from borrowinfo where username = ? and bookname = ? ";

PreparedStatement pre = con.prepareStatement(sql);

pre.setString(1, username);

pre.setString(2, bookname);

pre.execute();

return true;

} catch (SQLException e) {

System.out.println("查询失败");

e.printStackTrace();

return false;

}

}

}

control层代码

/**

* asdfasd 发斯蒂芬

*

*/

package library.controller;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

import library.dao.LibararyDao;

import library.po.Bookinfo;

import library.po.BorrowInfo;

import library.po.User;

public class BookController {

private static LibararyDao bookdao;

private BorrowInfo b;

public BookController() {

if(bookdao == null) bookdao = new LibararyDao();

}

public static void main(String[] args) {

//System.out.println(new BookController().addUser(new User("123", "dvdf")));

//System.out.println(new BookController().borrowBook("123", new User("123", "dvdf")));

// new BookController().fenyeInfo(2);

}

/**

* 用户登录

* @param user 传过来的账号密码

* @return 返回1为登陆成功 2为不存在 3异常

*/

public int loginUser(User user){

ResultSet rs =bookdao.queryUser(user);//验证用户是否存在

try {

if(rs!=null&&rs.next()){

boolean b =rs.getString("password").equals(user.getPassword());

if(b){

return 1;

}

}

return 2;

} catch (SQLException e) {

e.printStackTrace();

return 3;

}

}

/**

* 管理员登陆

* @param user 传过来的账号密码

* @return 返回1为登陆成功 2为不存在 3异常

*/

public int loginGuanli(User user){

ResultSet rs =bookdao.queryUser(user);//验证管理员是否存在

try {

if(rs!=null&&rs.next()){

boolean b =rs.getString("password").equals(user.getPassword());

int b1 = rs.getInt("isguanli");//管理员标志位1

if(b&&b1==1){

return 1;

}

}return 2;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

return 3;

}

}

/**

* 查询书籍列表

* @return 返回1为查询成功并已经输出 2为失败或其他

*/

public int queryBookinfo(){

try {

ResultSet r =bookdao.queryAllBook();

while(r!=null&&r.next()){

r.getString("zuozhe")+"总数"+r.getInt("shuliang")+"剩余数量"+r.getInt("shengyushuliang"));

}

if(r==null)return 2;

return 1;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

return 2;

}

}

/**

* 查询书籍数量和剩余数量

* @return 返回1为查询成功并已经输出 2为失败或其他

*/

public ResultSet queryBookK(String bookname){

ResultSet r =bookdao.queryBook(bookname);

return r;

}

/**

* 查询书籍

* @return 返回1为查询成功并已经输出 2为失败或其他

*/

public int queryBook(String bookname){

try {

ResultSet r =bookdao.queryBook(bookname);

while(r!=null&&r.next()){

r.getString("zuozhe")+"总数"+r.getInt("shuliang")+"剩余数量"+r.getInt("shengyushuliang"));

}

if(r==null)return 2;

return 1;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

return 2;

}

}

/**

* 加入新的图书信息

* @param bookinfo 书籍的详细信息

* @return 1成功 2失败

*/

public int addBookinfo(Bookinfo bookinfo){

boolean b = bookdao.addBook(bookinfo);

if(b)return 1;

return 2;

}

/**

* 注册用户

* @param user

* @return

*/

public int addUser(User user){

ResultSet rs =bookdao.queryUser(user);

try {

if(rs!=null&&!rs.next()){

boolean b =bookdao.addUser(user);

if(b)return 1;

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

return 3;

}

return 2;

}

/**

* 查询用户所有信息

* @param user

* @return

*/

public int queryUser(User user){

ResultSet r = bookdao.queryUser(user);

try {

if(r.next()){

user.setBooks(r.getInt("books"));

System.out.println(user);

return 1;

}

return 2;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

return 2;

}

}

/**

* 借书 先检查书是否存在,再检查书籍是否有库存,然后检查是否已结借此书

* 最后以上检查没有错误,就可以借书。 用户持有数量增加,借书信息详解录入,库存更新

*

* 注意事项

* 1 resultset 默认指向数据前一个位置 必须 用 next

* 2 需要加入事务 防止出现错误造成数据表更新不一致

* @param bookname 书名

* @return

*/

public String borrowBook(String bookname,User user){

try {

if(!bookdao.queryBook(bookname).next()){

return "借书失败-书籍不存在";}

ResultSet querybookrs = bookdao.queryBook(bookname);

while(querybookrs.next()){

int t = querybookrs.getInt("shengyushuliang");

if(t<1){return "库存不足";}

ResultSet rs =bookdao.queryBorrowinfo(user.getUsername());

if(rs!=null&&!rs.next()){

//加入借阅详细信息

boolean b1 =bookdao.addborrowinfo(user.getUsername(), bookname);

//更新借书数量

ResultSet rs1 = bookdao.queryUser(user);

rs1.next();

user.setBooks(rs1.getInt("books")+1);

bookdao.updateUserbooks(user);

//更新库存

boolean b2 =bookdao.updateBookinfo(bookname, t-1);

//System.out.println(b1+" "+b2);

return b1?(b2?"借书成功":"借书失败"):("借书失败");

}

}

return null;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

return "借书失败-其他错误";

}

}

/**还书

* 更新用户持有数,归还书的库存,删除借书信息表中信息

* @param user 更新数据数

* @param bookinfo 更新库存后的数

* @return

*/

public int returnBook(User user,String bookname){

boolean b1 = bookdao.deleteBorrowInfo(user.getUsername(),bookname);

boolean b2 = false;

boolean b3 = false;

try {

//更新库存

ResultSet r = bookdao.queryBook(bookname);

if(r.next()){

int i = r.getInt("shengyushuliang");

b2 = bookdao.updateBookinfo(bookname,i+1);

}

//更新持有书数

r = bookdao.queryUser(user);

if(r.next()){

int i = r.getInt("books");

user.setBooks(i-1);

b3 =bookdao.updateUserbooks(user);

}

if(!b1||!b2||!b3){

return 2;

}

return 1;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

return 2;

}

}

/**

* 查询用户的借书情况

* @param user 用户

* @return 返回借阅信息

*/

public List queryborrowinfo(User user){

ResultSet r = bookdao.queryBorrowinfo(user.getUsername());

List l = new ArrayList();

try {

while(r!=null&&r.next()){

b = new BorrowInfo();

b.setUsername(r.getString("username"));

b.setBookname(r.getString("bookname"));

b.setBorrowdate(r.getDate("borrowdate"));

b.setReturndate(r.getDate("returndate"));

l.add(b);

}

return l;

} catch (SQLException e) {

e.printStackTrace();

return null;

}

}

/**

* 指定页码

* @param age

*/

public void fenyeInfo(int age){

int i =bookdao.queryPageInfo();

System.out.println("总页数:"+i);

try {

if(i>0){

ResultSet r = bookdao.querySubBookInfo((age-1)*5);

while(r!=null&&r.next()){

r.getString("zuozhe")+"总数"+r.getInt("shuliang")+"剩余数量"+r.getInt("shengyushuliang"));

}

}

} catch (SQLException e) {

e.printStackTrace();

}

}

/**

* 指定上下页

* @param age

*/

public void fenyeInfo(String age){

}

/**

* 更新图书信息

* 可更新任务可以多选

*

* 书名进行判断是否存在

* 库存和剩余数量进行逻辑上的验证

*/

public void updateBookinfo(String bookname){

Scanner scan = new Scanner(System.in);

int i =scan.nextInt();

List> list = new ArrayList>();

List list1 = null;

if(i==1){

String newbookname = scan.next();

list1 = new ArrayList();

list1.add("zuozhe");

list1.add("'"+newbookname+"'");

list.add(list1);

}

//如果更新了库存,剩余数量也会跟着更新 需要判断库存逻辑的正确性

System.out.println("更新数量输入2,跳过22");

int ii = scan.nextInt();

if(ii==2){

System.out.println("请更新库存数量");

int newsum = scan.nextInt();

//判断数量逻辑的正确性

ResultSet r = queryBookK(bookname);

int oldsum=0;int sykc=0;//旧库存和剩余数量

try {

while(r.next()){

oldsum = r.getInt("shuliang");

sykc = r.getInt("shengyushuliang");

}

if(newsum>oldsum){

sykc+=newsum-oldsum;//记录更新后的剩余数量

//System.out.println("根据已有库存,库存总量为---"+newsum);

}

else if(newsum=sykc){//如何新的库存少于就库存。判断新库存与剩余数量的关系

sykc-=newsum;

}else{

System.out.println("输入错误");

return ;

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

list1 = new ArrayList();

list1.add("shuliang");

list1.add(String.valueOf(newsum));

list.add(list1);

list1 = new ArrayList();

list1.add("shengyushuliang");

list1.add(String.valueOf(sykc));

list.add(list1);

}

bookdao.updateBookinfo(list, bookname);

}

}

view层

package library.view;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.Date;

import java.util.InputMismatchException;

import java.util.List;

import java.util.Scanner;

import library.controller.BookController;

import library.po.Bookinfo;

import library.po.BorrowInfo;

import library.po.User;

/**

* 视图类,也是界面的显示层。程序运行的入口

* 想说的话:

* 如果使用web作为v层,只需要把bookrun方法拆开就可以了。对应会话跟踪,把 private static User user 存入session对象就可以了

* 框架的话用springmvc 。对于dao加入orm框架(hibernate ,mybatis)。整合起来也就是常见的ssm体系或ssh体系

* 数据库的选择更是随你心情。mysql SQLserver 等等。

* 项目bug仔细看的话很多。本意想给入门的同学一个思路方向。对于一些变量的命名请不要学我(偷懒),养成一个良好的

* 习惯。祝你在编程的道路上越走越远!!

*/

public class View {

//controller 业务控制类

private static BookController bookc = new BookController();

//登陆后的用户跟踪类似session

private static User user;

//控制主界面的循环

private static boolean flag = true;

//接受控制台输入

private static Scanner scan = new Scanner(System.in);

public static void main(String[] args) {

bookRun();

}

//主界面 应该考虑其他输入的限定 (当输入字符时,系统停止运行)

public static void bookRun(){

try{

do{

System.out.println("欢迎来到图书借阅系统\n登陆输入: 1\n注册输入: 2\n管理员管理:3");

int i1 = scan.nextInt();

switch (i1) {

case 1://登陆逻辑

System.out.println("输入账号");

String username = scan.next();

System.out.println("密码");

String password = scan.next();

int i =bookc.loginUser(new User(username, password));

if(i==1){

System.out.println("登陆成功");

user = new User(username, password);

loginSuccess(user);

}else if(i!=1){

System.out.println("登陆失败,检查密码或者账号");

}

break;

case 2:

//注册逻辑 可以添加验证密码 进行密码的确定 java api有把明文进行处理的方法,请自行搜索

//还可以加入正则表达式进行账号的限定(对于特殊字符输入的处理等)

System.out.println("输入申请账号");

String username1 = scan.next();

System.out.println("密码");

String password1 = scan.next();

//此处可以再次确认密码的逻辑

System.out.println(addUser(new User(username1, password1)));

System.out.println("返回上一层");

break;

case 3://管理员逻辑

System.out.println("输入管理员账号");

String username2 = scan.next();

System.out.println("密码");

String password2 = scan.next();

user = new User(username2, password2);

int i2 =bookc.loginGuanli(user);

if(i2==1){

loginGuanliSuccess();

}else{

System.out.println("登陆失败,检查密码或者账号");

}

break;

default :

System.out.println("输入序号不正确");

break;

}

}while(flag);

}catch(InputMismatchException e){

System.out.println("输入异常,请重启系统");

}

}

//此处可以添加新的功能而不影响已有功能 (可以改为switch语句)

private static void loginGuanliSuccess() {

while(true){

System.out.println("添加图书:1\n更改图书信息:2\n返回:3");

int i = scan.nextInt();

if(i==1){

addBook();

}else if(i==2){

updateBookinfo();

}else if(i==3){

return;

}

}

}

//更新图书

/**

* 更新图书 只有管理员权限可以操作

*/

private static void updateBookinfo() {

//应该判断书名是否存在 contro层设计

System.out.println("请输入书名");

String bookname = scan.next();

int a = bookc.queryBook(bookname);

if(a!=1){

System.out.println("不存在,已返回上一层");

return;

}

int i =scan.nextInt();

List> list = new ArrayList>();

List list1 = null;

if(i==1){

String newbookname = scan.next();

list1 = new ArrayList();

list1.add("zuozhe");

list1.add("'"+newbookname+"'");

list.add(list1);

}

//如果更新了库存,剩余数量也会跟着更新 需要判断库存逻辑的正确性

System.out.println("更新数量输入2,跳过22");

int ii = scan.nextInt();

if(ii==2){

//判断数量逻辑的正确性

ResultSet r =bookc.queryBookK(bookname);

try {

int i1=0;int i2=0;

while(r.next()){

i1 = r.getInt("shuliang");

i2 = r.getInt("shengyushuliang");

}

if(ii>i1){

i2+=ii-i1;

}

if(ii=i2){

}

System.out.println("更新后的数量错误");

return;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

String newkucun= scan.next();

list1 = new ArrayList();

list1.add("shuliang");

list1.add(newkucun);

list.add(list1);

}*/

bookc.updateBookinfo(bookname);

}

//添加图书 需要保证名字唯一性

private static void addBook() {

System.out.println("图名");

String bookname = scan.next();

String zuozhe = scan.next();

System.out.println("数量");

int shuliang = scan.nextInt();

Bookinfo bookinfo = new Bookinfo(bookname, zuozhe, shuliang, shuliang,new Date());

int i =bookc.addBookinfo(bookinfo);

if(i==1){

System.out.println("添加成功");

}else{

System.out.println("错误");

}

}

//注册界面的实现

private static String addUser(User user){

switch (bookc.addUser(user)) {

case 1:

return "注册成功";

case 2:

return "用户已注册";

case 3:

return "其他错误,重试";

}

return "其他错误,重试";

}

//登陆功能实现

private static void loginSuccess(User user ){

while (true){

System.out.println("查看借阅信息请输入:1,借书:2,还书:3,账号信息:4,退出:5"

+ "查询图书:6修改密码:7\n");

int i = scan.nextInt();

switch (i) {

case 1:

borrowInfo(user);

break;

case 2:

borrowBook(user);

break;

case 3:

returnBook(user);

break;

case 4:

queryUser(user);

break;

case 5:

return ;

case 6:

System.out.println("请输入书名");

queryBook(scan.next());

break;

case 7: break;

default:

System.out.println("输入错误");

break;

}

}

}

//查询借阅信息

private static void borrowInfo(User user ){

List l=bookc.queryborrowinfo(user);

if(l==null||l.isEmpty()){

System.out.println("没有借阅信息");

return;

}

for (BorrowInfo borrowInfo : l) {

System.out.println(borrowInfo);

}

}

//借书

private static void borrowBook(User user){

System.out.println("请输入借阅的书籍名称");

String bookname =scan.next();

String flog = bookc.borrowBook(bookname, user);

System.out.println(flog);

System.out.println("是否继续借书:y|n");

String flog1 = scan.next();

if(flog1.equalsIgnoreCase("y")){

borrowBook(user);

}

}

//还书

private static void returnBook(User user1 ){

List l=bookc.queryborrowinfo(user1);

if(l==null||l.isEmpty()){

System.out.println("没有借阅信息");

return;

}

for (BorrowInfo borrowInfo : l) {

System.out.println(borrowInfo);

}

System.out.println("请输入要还书籍的名字");

String bookname = scan.next();

int flog =bookc.returnBook(user1, bookname);

if(flog==1){

System.out.println("还书成功");

}else{

System.out.println("失败");

}

System.out.println("是否继续还书:y|n");

String flog1 = scan.next();

if(flog1.equalsIgnoreCase("y")){

returnBook(user1);

}

}

//用户信息

private static void queryUser(User user){

int i =bookc.queryUser(user);

if( i!=1){

System.out.println("失败");

}

}

private static void queryBook(String bookname){

int i = bookc.queryBook(bookname);

if(i!=1)System.out.println("书籍不存在");

}

private static void GuanliFace(){

while(true){

System.out.println("查询书籍列表请输入 :1;添加图书:2;使用分页查看书籍列表");

int i =scan.nextInt();

switch (i) {

case 1:

int i1= bookc.queryBookinfo();

if(i1==2)System.out.println("错误");

break;

case 2:

System.out.println("书名");

String booknname1 = scan.next();

String zuozhe1 = scan.next();

System.out.println("数量");

int shuliang1 = scan.nextInt();

Date date = new Date();

int i3 = bookc.addBookinfo(new Bookinfo(booknname1, zuozhe1, shuliang1, shuliang1, date));

if(i3==2)System.out.println("错误");

break;

case 3:

default:

System.out.println("错");

break;

}

}

}

private static void fenyeInfo(){

}

}

数据库

/用户表

CREATE TABLE `userinfo` (

`id` int(10) NOT NULL AUTO_INCREMENT,

`username` varchar(20) COLLATE utf8_bin DEFAULT NULL,

`password` varchar(20) COLLATE utf8_bin DEFAULT NULL,

`books` int(10) DEFAULT NULL,

`isguanli` int(10) NOT NULL DEFAULT '0',

PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=21 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

/借书信息

CREATE TABLE `borrowinfo` (

`id` int(10) NOT NULL AUTO_INCREMENT,

`username` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,

`bookname` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,

`borrowdate` date DEFAULT NULL,

`returndate` date DEFAULT NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

/书籍信息 字段用的拼音:-D

CREATE TABLE `bookinfo` (

`id` int(10) NOT NULL AUTO_INCREMENT,

`bookname` varchar(20) COLLATE utf8_unicode_ci NOT NULL,

`zuozhe` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,

`shuliang` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,

`shengyushuliang` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,

`date` date DEFAULT NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;


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