Java-超市收银系统（Java基础知识项目）

超市收银系统：

该系统主要是针对Java基础知识的练习项目
设计目标是面向小超市
系统主要分为两个模块：会员登入模块、员工登录模块
其中员工登录中还有其他许多小模块，如会员管理、上下班打卡等
其中比较难的主要是营业额查询、收银结算和打卡

开发工具：eclipse
数据库：MySQL 8 sqlyog

关于打卡：
员工考勤信息系统
实现智能化的考勤功能
需求：
企业上班时间：9:00
企业下班时间：18:00
标准：
11:00>上班打卡时间>9:00：迟到处理
上班打卡时间>11:00 旷工处理
16:00<下班打卡时间<18:00 早退处理
下班打卡时间<16:00 旷工处理
上班、下班缺卡旷工处理
上班时间有数据，下班没有数据旷工处理
上班时间没有数据，下班有数据旷工处理
1、实现员工智能考勤
a、能够根据员工的打卡信息，统计考勤信息
（考勤信息：迟到（个数）、早退（个数）、旷工（个数））
2、实现员工打卡功能
a、上班打卡
b、下班打卡

3、员工注册功能

数据库中打卡语句：

数据库视图

create or replace view check_info_son
as
select work_date,employee_no,clock_in_time,clock_off_time,
TIMESTAMPDIFF(MINUTE, clock_in_time, concat(clock_date,' 09:00:00')) as diff_in_time,
TIMESTAMPDIFF(MINUTE, clock_off_time, concat(clock_date,' 18:00:00')) as diff_off_time
from work_date w
left join clock_info t
on t.clock_date = w.work_date create or replace view check_info
as
select t.work_date,t.employee_no,clock_in_time,clock_off_time, case when diff_in_time<-120then '旷工'when diff_in_time<0 then '迟到'when diff_in_time>0then '正常'else '忘记打卡'end as diff_in_status,case when diff_off_time>120then '旷工'when diff_off_time>0 then '早退'when diff_off_time<0then '正常'else '忘记打卡'end as diff_off_timefrom check_info_son t select * from check_info;select * from employee where number='s0001';

因为我使用的数据库为：

所以在eclipse中的jar包为：

关于这个的操作我之前的博客有

在我的项目中以下这个文件也有所不同

如下：

driver=com.mysql.cj.jdbc.Driver
#url=jdbc:mysql:///mydb1?rewriteBatchedStatements=true&useUnicode=true&charcterEncoding=utf8
url=jdbc:mysql:///supermaket?rewriteBatchedStatements=true&serverTimezone=UTC
#url=jdbc:mysql:///mydb1?rewriteBatchedStatements=true
user=root
password=123456

整个项目分别有：

管理员功能实现代码：
impl 中代码

package com.gec.dao.impl;import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Scanner;import com.gec.dao.AdminDao;
import com.gec.dao.BuyerDao;
import com.gec.domain.Admin;
import com.gec.domain.Buyer;
import com.gec.domain.Cashier;
import com.gec.util.JDBCUtil;public class AdminDaoImpl implements AdminDao{Scanner sc = new Scanner(System.in);private String sql;@Override//管理员 账号密码public Admin login(String number, String password) {Connection conn = null;PreparedStatement statement = null;ResultSet rs = null;try {conn = JDBCUtil.getConnection();String sql = "select * from employee where number = ? and password=?";statement = conn.prepareStatement(sql);statement.setString(1, number);statement.setString(2, password);System.out.println("sql:" + statement);//执行rs = statement.executeQuery();//遍历结果集while(rs.next()) {//rs.getInt(1);  这种不推荐String nb = rs.getString("number");String uname = rs.getString("username");String upassword = rs.getString("password");String sex = rs.getString("sex");String phonr = rs.getString("phone");int role = rs.getInt("role");//创建用户对象Admin user = new Admin();user.setNumber(nb);user.setUsername(uname);user.setSex(sex);user.setPassword(upassword);user.setPhone(phonr);user.setRole(role);//返回用户信息return user;}} catch (SQLException e) {e.printStackTrace();}finally {JDBCUtil.closeConn(conn, statement, rs);}return null;}@Override//删除public void remove(String number) {Connection conn = null;Statement statement = null;try {String sql = "delete from employee where number=" + number;conn = JDBCUtil.getConnection();statement = conn.createStatement();//执行Sqlstatement.executeUpdate(sql);//观察sql打印System.out.println(sql);} catch (SQLException e) {e.printStackTrace();}finally {JDBCUtil.closeConn(conn, statement, null);}}@Override//查询所有public void QueryAll(Admin all) {Connection conn = null;ResultSet rs = null;PreparedStatement st = null;try {conn = JDBCUtil.getConnection();st = conn.prepareStatement(sql);rs = st.executeQuery();while (rs.next()) {Admin employee = new Admin();employee.setNumber(rs.getString("number"));employee.setUsername(rs.getString("username"));employee.setPassword(rs.getString("password"));employee.setSex(rs.getString("sex"));employee.setPhone(rs.getString("phone"));employee.setRole(rs.getInt("role"));System.out.println(employee);}} catch (SQLException e) {e.printStackTrace();} finally {JDBCUtil.closeConn(conn, st, rs);}}@Override//添加public void saveUser(Admin user) {Connection conn = null;Statement statement = null;try {//String sql = "insert into tb_user(name,sex)values('" + name + "','" + sex +"')";String sql = "insert into employee(number,username,password,sex,phone,role,remark)values('"+ user.getNumber() + "',"+ "'" + user.getUsername() + "','" + user.getPassword() +"','" + user.getSex() +"','"+ user.getPhone()+"','" + user.getRole() +",'"+ user.getRemark() +")";conn = JDBCUtil.getConnection();statement = conn.createStatement();//执行Sqlstatement.executeUpdate(sql);//观察sql打印System.out.println(sql);} catch (SQLException e) {e.printStackTrace();}finally {JDBCUtil.closeConn(conn, statement, null);}}@Override//查找public List<Admin> findAdmin(Admin role) {Connection conn = JDBCUtil.getConnection();PreparedStatement ps = null;ResultSet rs = null;List<Admin> employees = new ArrayList<Admin>();String sql = "select * from employee where role = " + role;try {ps = conn.prepareStatement(sql);rs = ps.executeQuery();while (rs.next()) {Admin employee = new Admin();employee.setNumber(rs.getString("number"));employee.setPassword(rs.getString("password"));employee.setSex(rs.getString("sex"));employee.setRole(rs.getInt("role"));employee.setPhone(rs.getString("phone"));employee.setUsername(rs.getString("username"));employees.add(employee);}return employees;} catch (SQLException e) {e.printStackTrace();} finally {JDBCUtil.closeConn(conn, ps, rs);}return null;}@Override//修改public void update(Admin number) {Connection conn = null;Statement st = null;ResultSet rs = null;Admin admin =new Admin();try {String sql = "update employee set username ='" + admin.getUsername() + "',password='" + admin.getPassword() + "',sex ='" +admin.getSex() + "',phone ='" +admin.getPhone() + "' where number = '" + admin.getNumber() + "'";conn = JDBCUtil.getConnection();st = conn.createStatement();// 执行sqlst.executeUpdate(sql);// 观察sql打印} catch (SQLException e) {e.printStackTrace();}finally {JDBCUtil.closeConn(conn, st, null);}}@Override//上班打卡public Date clockIn(Admin ad) {Date date = new Date();Connection conn = JDBCUtil.getConnection();PreparedStatement ps = null;String sql = "insert into clock_info (employee_no,clock_in_time,clock_date) values (?,?,?)";try {ps = conn.prepareStatement(sql);ps.setString(1, ad.getNumber());Timestamp timeStamp = new Timestamp(date.getTime());ps.setTimestamp(2, timeStamp);Date clock_date = new Date();ps.setDate(3, new java.sql.Date(clock_date.getTime()));ps.executeUpdate();} catch (SQLException e) {e.printStackTrace();} finally {JDBCUtil.closeConn(conn, ps, null);}return date;}@Override//下班打卡public Date clockOut(Admin ad2) {Connection conn = JDBCUtil.getConnection();PreparedStatement ps = null;ResultSet rs = null;String sql = "update clock_info set clock_off_time = ? where clock_date = ? and employee_no = ? ";Date date = new Date();Timestamp timeStamp = new Timestamp(date.getTime());try {ps = conn.prepareStatement(sql);ps.setTimestamp(1, timeStamp);ps.setDate(2, new java.sql.Date(date.getTime()));ps.setString(3, ad2.getNumber());ps.executeUpdate();} catch (SQLException e) {e.printStackTrace();}return timeStamp;}@Override//查询超市营业额public void turnover(Admin price) {// TODO Auto-generated method stub}@Override//会员管理public void VipManage() {// TODO Auto-generated method stub}@Overridepublic List findAdmin() {// TODO Auto-generated method stubreturn null;}@Override//修改public Admin update(String number) {Connection conn = null;Statement st = null;ResultSet rs = null;Admin admin =new Admin();try {String sql = "update employee set username ='" + admin.getUsername() + "',password='" + admin.getPassword() + "',sex ='" +admin.getSex() + "',phone ='" +admin.getPhone() + "' where number = '" + admin.getNumber() + "'";conn = JDBCUtil.getConnection();st = conn.createStatement();// 执行sqlst.executeUpdate(sql);// 观察sql打印} catch (SQLException e) {e.printStackTrace();}finally {JDBCUtil.closeConn(conn, st, null);}return admin;}@Override//出勤管理public void lookAttendance(String work_date) {List<Admin> clock_infos = new ArrayList();List<Admin> check_infos = new ArrayList();Connection conn = null;PreparedStatement st = null;ResultSet rs = null;try {conn = JDBCUtil.getConnection();String sql = "select check_info.work_date,check_info.employee_no,employee.username,check_info.clock_in_time,check_info.clock_off_time,check_info.diff_in_status,check_info.diff_off_time"+ " from check_info,employee where check_info.employee_no = employee.number and work_date = '" + work_date + "'";st = conn.prepareStatement(sql);// 执行rs = st.executeQuery();System.out.println("工作日期\t\t员工编号\t\t员工姓名\t\t上班时间\t\t\t下班时间\t\t  上班情况\t下班情况");// 遍历结果集while (rs.next()) {work_date = rs.getString("work_date");String employee_no = rs.getString("employee_no");String username = rs.getString("username");String clock_in_time = rs.getString("clock_in_time");String clock_off_time = rs.getString("clock_off_time");String diff_in_status = rs.getString("diff_in_status");String diff_off_time = rs.getString("diff_off_time");if (clock_in_time == null) {clock_in_time= "null\t\t";}else if (clock_off_time == null) {clock_off_time=  "null\t\t";   }System.out.println(work_date + "\t" + employee_no + "\t\t" + username + "\t" + clock_in_time + "\t" + clock_off_time + "\t" + diff_in_status + "\t" + diff_off_time);}} catch (SQLException e) {e.printStackTrace();} finally {JDBCUtil.closeConn(conn, st, rs);}}@Override//钱public void money(Admin employee) {String sql = null;System.out.println("请输入你想要购买的商品：");int number = sc.nextInt();//通过商品名查找商品库存int inventory = findInventoryByNumber(number);System.out.println("你想要购买的商品还有："+inventory+"件，你想要购买:");int buy = sc.nextInt();String sql1 = "update goods set inventory = inventory - " + buy + " where c_number = '" + number +"'";settlementDML(sql1);Date date = new Date();SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String d = dateFormat.format(date);System.out.println("是否是会员购买：(y/n)");String isVip = sc.next();if(isVip.equals("y")) {System.out.println("请输入购买的会员号：");String vipNumber = sc.next();sql = "insert into sell_info (s_c_number,s_quantity,s_time,s_e_number,s_vip_number) values ("+number+","+buy+",'"+d+"','"+employee.getNumber()+"','"+vipNumber+"')";}else {sql = "insert into sell_info (s_c_number,s_quantity,s_time,s_e_number) values ("+number+","+buy+",'"+d+"','"+employee.getNumber()+"')";}settlementDML(sql);}//通过商品名来查找商品的库存@Overridepublic int findInventoryByNumber(int number) {Connection conn = JDBCUtil.getConnection();PreparedStatement ps = null;ResultSet rs = null;String sql = "select inventory from goods where c_number = ?";try {ps = conn.prepareStatement(sql);ps.setInt(1, number);rs = ps.executeQuery();//判断结果集是否为空if(rs.next()) {//判断库存是否为0int inventory = rs.getInt("inventory");if(inventory <= 0) {System.out.println("你想要购买的商品没有库存了，是否让采购员去进货?(y/n)");String isBuy = sc.next();if(isBuy.equals("y")) {BuyerDao bdao = new BuyerDaoImpl();bdao.Buy();}}else {return inventory;}}else {System.out.println("没有找到你想要购买的商品！");}} catch (SQLException e) {e.printStackTrace();}finally {JDBCUtil.closeConn(conn, ps, rs);}return 0;}//执行dml语句@Overridepublic void settlementDML(String sql) {Connection conn = JDBCUtil.getConnection();PreparedStatement ps = null;try {ps = conn.prepareStatement(sql);ps.executeUpdate();} catch (SQLException e) {e.printStackTrace();}finally {JDBCUtil.closeConn(conn, ps, null);}}@Overridepublic void money(String sf2) {// TODO Auto-generated method stub}}

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