jdbc实现图书馆借阅系统
这篇文章主要为大家详细介绍了jdbc实现图书馆借阅系统,具有一定的参考价值,感兴趣的小伙伴们可以参考一下前言
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;
}
}
/**
* 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()){
system.out.println("书名"+r.getstring("bookname")+"作者"+
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()){
system.out.println("书名"+r.getstring("bookname")+"作者"+
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<borrowinfo> queryborrowinfo(user user){
resultset r =bookdao.queryborrowinfo(user.getusername());
list<borrowinfo> l = new arraylist<borrowinfo>();
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()){
system.out.println("书名"+r.getstring("bookname")+"作者"+
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
* 更新作者,库存,剩余数量,不更新日期,书名(不就是添加了新的书籍了吗)
* 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);
system.out.println("更新作者输入:1,跳过11");
int i =scan.nextint();
list<list<string>> list = new arraylist<list<string>>();
list<string> list1 = null;
if(i==1){
string newbookname = scan.next();
list1 = new arraylist<string>();
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<oldsum&&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<string>();
list1.add("shuliang");
list1.add(string.valueof(newsum));
list.add(list1);
list1 = new arraylist<string>();
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;
}
/* system.out.println("更新作者输入1,跳过11");
int i =scan.nextint();
list<list<string>> list = new arraylist<list<string>>();
list<string> list1 = null;
if(i==1){
string newbookname = scan.next();
list1 = new arraylist<string>();
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<i1&&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<string>();
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();
system.out.println("作者");
string zuozhe = scan.next();
system.out.println("数量");
intshuliang = 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<borrowinfo> 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<borrowinfo> 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();
system.out.println("作者");
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;
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持CodeAE代码之家。
http://www.zzvips.com/article/176843.html
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