Java从零实现超市会员管理系统
目录
- 项目需求
- 覆盖知识
- 开发思路
- 开发步骤
- 全部代码展示
- 1、Member类
- 2、DBUtils类
- 3、数据访问层的MemberDao接口
- 4、数据访问层的MemberDaoImpl类
- 5、服务层的MemberService接口
- 6、服务层的MemberServiceImpl类
- 7、视图层MemberMgr测试类
项目需求
为某超市开发一个超市会员管理系统,实现会员的管理,具体实现功能如下:
(1)积分累计
(2)积分兑换
(3)查询剩余积分
(4)查询所有会员信息
(5)修改密码
(6)开卡(注册会员)
覆盖知识
程序基本概念、数据类型、流程控制、顺序、选择 、循环、跳转语句、变量、类、方法、实用类等
掌握数据库、JDBC、三层架构等相关知识。
掌握Druid连接池、Apache的DBUtils使用 。
开发思路
(1)明确需求
(2)编码顺序
- 数据初始化,完成数据表创建,三层架构的搭建
- 循环完成各种超市会员管理操作
- 菜单切换
(3)测试
开发步骤
1)、添加需要的jar包到项目中,将lib文件夹中的jar文件通过鼠标右单击选择Build Path的方式添加到你设置的eatJar文件目录里。
2)、创建database.properties文件,用来配置注册驱动和数据库连接对象的相关数据。
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/Java221804username=rootpassword=huanghuanginitialSize=10maxActive=30maxIdle=5maxWait=3000
3)、添加需要的工具类DBUtils类
package cn.book.utils; import java.io.IOException; import java.io.InputStream; imporwww.devze.comt java.util.Properties; import javax.sql.DataSource; import com.alibaba.druid.pool.DruidDataSource; import com.alibaba.druid.pool.DruidDataSourceFactory; public class DBUtils { private static DruidDataSource druidDataSource; static { Properties properties = new Properties(); try { InputStream is = DBUtils.class .getResourceAsStream("/database.properties"); properties.load(is); druidDataSource = (DruidDataSource) DruidDataSourceFactory .createDataSource(properties); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } public static DataSource getDataSource(){ return druidDataSource; } }
4)、创建数据表:member表
CREATE TABLE `member` ( `name` varchar(20) NOT NULL, `cardId` int(11) NOT NULL, `password` varchar(20) NOT NULL, `score` int(11) NOT NULL, `registDate` varchar(20) NOT NULL, UNIQUE KEY `cardId` (`cardId`) );
5)、编写book类,包含get/set方法、有参/无参构造、toString方法
6)、数据访问层DAO层的接口和实现类的增删改查方法的编写
7)、服务层Service层的接口和实现类的增删改查方法的编写
8)、最后完成视图层View层测试类的编写
全部代码展示
1、Member类
package cn.member.entity; public class Member { // 定义属性 private String name; private int cardId; private String password; private int score; private St编程客栈ring registDate; public Member() { super(); } public Member(String name, int cardId, String password, int score, String registDate) { super(); this.name = name; this.cardId = cardId; this.password = password; this.score = score; this.registDate = registDate; } // 定义get/set方法 public String getName() { return name; } public void setName(String name) { this.name = name; } public int getCardId() { return cardId; } public void setCardId(int cardId) { this.cardId = cardId; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public int getScore() { return score; } public void setScore(int score) { this.score = score; } public String getRegistDate() { return registDate; } public void setRegistDate(String registDate) { this.registDate = registDate; } @Override public String toString() { return "Member [name=" + name + ", cardId=" + cardId + ", password=" + password + ", score=" + score + ", registDate=" + registDate + "]"; } }
2、DBUtils类
(使用连接池DruidDataSource、Apache的知识)
package cn.member.utils; import java.io.IOException; import java.io.InputStream; import java.util.Properties; import javax.sql.DataSource; import com.alibaba.druid.pool.DruidDataSource; import com.alibaba.druid.pool.DruidDataSourceFacHrFmVnGltory; public class DBUtils { private static DruidDataSource druidDataSource; static { Properties properties = new Properties(); try { InputStream is = DBUtils.class .getResourceAsStream("/database.properties"); properties.load(is); druidDataSource = (DruidDataSource) DruidDataSourceFactory .createDataSource(properties); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } public static DataSource getDataSource(){ return druidDataSource; } }
3、数据访问层的MemberDao接口
package cn.member.dao; import java.util.List; import cn.member.entity.Member; public interface MemberDao { // 增 public int insert(Member member); // 删 public int delete(int cardId); // 改 public int update(Member book); // 查一个 public Member select(int cardId); // 查javascript全部 public List<Member> selectAll(); }
4、数据访问层的MemberDaoImpl类
package cn.member.dao.impl; import java.sql.SQLException; import java.util.List; import org.apache.commons.dbutils.QueryRunner; import org.apache.commons.dbutils.handlers.BeanHandler; import org.apache.commons.dbutils.handlers.BeanListHandler; import cn.member.dao.MemberDao; import cn.member.entity.Member; import cn.member.utils.DBUtils; public class MemberDaoImpl implements MemberDao { private QueryRunner queryRunner = new QueryRunner(DBUtils.getDataSource()); @Override public int insert(Member member) { String sql = "insert into member(name,cardId,password,score,registDate) values(?,?,?,?,?);"; Object[] args = { member.getName(), member.getCardId(), member.getPassword(), member.getScore(), member.getRegistDate() }; try { return queryRunner.update(sql, args); } catch (SQLException e) { e.printStackTrace(); } return 0; } @Overrphpide public int delete(int cardId) { String sql = "delete from member where cardId=?;"; try { return queryRunner.update(sql, cardId); } catch (SQLException e) { e.printStackTrace(); } return 0; } @Override public int update(Member member) { String sql = "update `member` set `name`=?,`password`=?,`score`=?,`registDate`=? where `cardId`=?;"; Object[] args={member.getName(),member.getPassword(),member.getScore(),member.getRegistDate(),member.getCardId()}; try { return queryRunner.update(sql, args); } catch (SQLException e) { e.printStackTrace(); } return 0; } @Override public Member select(int cardId) { String sql = "select * from member where cardId=?;"; try { return queryRunner.query(sql, new BeanHandler<Member>(Member.class), cardId); } catch (SQLException e) { e.printStackTrace(); } return null; } @Override public List<Member> selectAll() { String sql = "SELECT * FROM member;"; try { return queryRunner.query(sql, new BeanListHandler<Member>( Member.class)); } catch (SQLException e) { e.printStackTrace(); } return null; } }
5、服务层的MemberService接口
package cn.member.service; import java.util.List; import cn.member.entity.Member; public interface MemberService { // 增 public int insertMember(Member member); // 删 public int deleteMember(int cardId); // 改 public int updateMember(Member member); // 查一个 public Member selectMember(int cardId); // 查全部 public List<Member> selectAllMembers(); }
6、服务层的MemberServiceImpl类
package cn.member.service.impl; import java.util.List; import cn.member.dao.MemberDao; import cn.member.dao.impl.MemberDaoImpl; import cn.member.entity.Member; import cn.member.service.MemberService; public class MemberServiceImpl implements MemberService { MemberDao memberDao = new MemberDaoImpl(); @Override public int insertMember(Member Member) { 开发者_Go培训if (memberDao.select(Member.getCardId()) == null) { return memberDao.insert(Member); } return 0; } @Override public int deleteMember(int cardId) { if (memberDao.select(cardId) != null) { return memberDao.delete(cardId); } return 0; } @Override public int updateMember(Member Member) { if (memberDao.select(Member.getCardId()) != null) { return memberDao.update(Member); } return 0; } @Override public Member selectMember(int cardId) { memberDao.select(cardId); return null; } @Override public List<Member> selectAllMembers() { List<Member> listMembers = memberDao.selectAll(); return listMembers; } }
7、视图层MemberMgr测试类
package cn.member.view; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.Scanner; import cn.member.entity.Member; import cn.member.service.MemberService; import cn.member.service.impl.MemberServiceImpl; public class MemberMgr { // 定义一个Scanner Scanner sc = new Scanner(System.in); // 定义Member对象 Member member = new Member(); MemberService ms=new MemberServiceImpl(); //从数据库中查全部会员信息 List<Member> listM=null; // 菜单选择栏 public void showFirst() { System.out .println("****************************************欢迎使用超市会员管理系统*****************************************"); System.out .println("1.开卡\t2.修改密码\t3.积分累计\t4.积分兑换\t5.剩余积分查询\t6.查看所有会员信息\t7.退出"); System.out .println("*******************************************************************************************************"); } // 会员卡号随机产生方法 public int cardRandom() { return (int) (Math.random() * (19999999 - 10000000) + 10000000); } // 注册时判断会员是否存在 public boolean isCardId(int mm) { boolean isCId = false; if (listM.size() > 0) { for (Member memberC : listM) { if (mm == memberC.getCardId()) { isCId = true; return isCId; } } } return isCId; } // 判断会员卡和密码是否正确 public boolean isMember(int mm, String pwd) { boolean isCId = false; if (listM.size() > 0) { for (Member memberC : listM) { // System.out.println(mm+"/"+pwd+"/"+memberC.getCardId()+"/"+memberC.getPassword()); if (mm == memberC.getCardId() && pwd.equals(memberC.getPassword())) { isCId = true; member = memberC; return isCId; } } } return isCId; } // 1、开卡 public void OpenCard() { // 每次都初始化一条member对象 member = new Member(); do { member.setCardId(cardRandom()); } while (isCardId(member.getCardId())); System.out.print("请输入注册姓名:"); member.setName(sc.next()); System.out.print("请输入注册密码:"); String password1 = sc.next(); do { if (password1.length() < 6) { System.out.print("会员密码不能小于6位,请重新输入注册密码:"); password1 = sc.next(); } } while (password1.length() < 6); member.setPassword(password1); member.setScore(100); Date data = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH:mm"); member.setRegistDate(sdf.format(data)); // ms.insertMember(member); if(ms.insertMember(member)>0){ System.out.println("恭喜,开通会员卡成功!系统赠送您" + member.getScore() + "积分,您的会员卡号是:" + member.getCardId()); }else{ System.out.println("会员开通失败!"); } // listM.add(member); } // 2、修改密码 public void changePassword() { System.out.print("请输入您的会员卡号:"); int cardNum = sc.nextInt(); System.out.print("请输入您的会员密码:"); String cardPwd = sc.next(); if (isMember(cardNum, cardPwd)) { System.out.print("请输入您的会员新密码:"); member.setPassword(sc.next()); if(ms.updateMember(member)>0){ System.out.println("新密码设置成功!"); }else{ System.out.println("新密码设置失败!"); } } else { System.out.println("您输入的会员卡号或密码错误,无法修改密码!"); } } // 3、积分累计 public void scoresAdd() { System.out.print("请输入您的会员卡号:"); int cardNum = sc.nextInt(); System.out.print("请输入您的会员密码:"); String cardPwd = sc.next(); if (isMember(cardNum, cardPwd)) { System.out.print("请输入本次消费金额(消费1元累计1分):"); int scoreCurrent = sc.nextInt(); member.setScore(scoreCurrent + member.getScore()); if(ms.updateMember(member)>0){ System.out.println("积分累计成功!你重新累计的积分为:" + member.getScore() + "分"); }else{ System.out.println("积分累计失败!"); } } else { System.out.println("您输入的会员卡号或密码错误,无法累计积分!"); } } // 4、积分兑换 public void scoresConver() { System.out.print("请输入您的会员卡号:"); int cardNum = sc.nextInt(); System.out.print("请输入您的会员密码:"); String cardPwd = sc.next(); if (isMember(cardNum, cardPwd)) { System.out.print("请输入您要兑换使用的积分(100积分抵用0.1元,不足100的积分不做抵用):"); int scoreCurrent = sc.nextInt(); if (scoreCurrent < member.getScore()&&scoreCurrent>100) { member.setScore(member.getScore() - scoreCurrent); ms.updateMember(member); if(ms.updateMember(member)>0){ System.out.println("您消费金额中使用会员积分抵扣了0." + (scoreCurrent /100) + "元"); }else{ System.out.println("积分兑换失败!"); } }else if(scoreCurrent<100){ System.out.println("不满足积分兑换规则,不足100的积分不做抵用!"); }else { System.out.println("积分不足!"); } } else { System.out.println("您输入的会员卡号或密码错误,无法进行兑换!"); } } // 5、剩余积分查询 public void scoresRemain() { System.out.print("请输入您的会员卡号:"); int cardNum = sc.nextInt(); System.out.print("请输入您的会员密码:"); String cardPwd = sc.next(); if (isMember(cardNum, cardPwd)) { System.out.println("会员信息【会员卡号:" + member.getCardId() + ",姓名:" + member.getName() + ",可用积分:" + member.getScore() + ",开卡时间:" + member.getRegistDate() + "】"); } else { System.out.println("您输入的会员卡号或密码错误,无法查询到信息!"); } } // 6、查看所有会员信息 public void LookMembers() { int i = 0; for (Member member : listM) { i++; System.out.println("会员" + i + "信息【会员卡号:" + member.getCardId() + ",姓名:" + member.getName() + ",可用积分:" + member.getScore() + ",开卡时间:" + member.getRegistDate() + "】"); } } public void MainMethod() { //从数据库中查全部会员信息 listM=ms.selectAllMembers(); boolean isIn = true; do { showFirst(); System.out.print("请选择:"); switch (sc.nextInt()) { case 1: OpenCard(); break; case 2: changePassword(); break; case 3: scoresAdd(); break; case 4: scoresConver(); break; case 5: scoresRemain(); break; case 6: LookMembers(); break; case 7: isIn = false; break; } } while (isIn); } public static void main(String[] args) { MemberMgr memberMgr=new MemberMgr(); memberMgr.MainMethod(); } }
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