jdbc实现宠物商店管理系统

用jdbc实现宠物商店管理系统

1.开发语言：Java
2.开发工具：eclipse,MySql数据库
3.开发环境：jdk1.8
4.操作系统：win10

这里是运行图片，代码在图片下面

这里是主程序测试类Test

// Main
package petStore1;

public class Test {

 public static void main(String[] args) {
 System.out.println("宠物商店启动");
 PetManage pm=new PetManage();
 pm.showAll();

 }
}

这里是工具类BaseDAO

用来对数据库进行增删改查的一个工具类

// BaseDAO
package petStore1;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class BaseDAO {

 public Connection conn = null;
 public PreparedStatement state = null;
 public ResultSet rs = null;
 
 
 

 public Connection getConnection() {
 try {
 Class.forName("com.mysql.jdbc.Driver");
 conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/petshop", "root", "123");
 } catch (Exception e) {
 e.printStackTrace();
 }
 return conn;
 }
 public int update(String sql, Object...obs) throws SQLException {
 int result = 0;
 conn = getConnection();
 state = conn.prepareStatement(sql);

 for (int i = 0; i < obs.length; i++) {
 state.setObject(i + 1, obs[i]);
 }
 result = state.executeUpdate();
 return result;
 }

 public ResultSet search(String sql, Object...obs) {
 try {
 conn = getConnection();
 state = conn.prepareStatement(sql);
 for (int i = 0; i < obs.length; i++) {
 state.setObject(i + 1, obs[i]);
 }
 rs = state.executeQuery();
 } catch (SQLException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 return rs;
 }
 public void closeObject1() {
 try {
 if (rs != null) {
 rs.close();
 }
 if (state != null) {
 state.close();
 }
 if (conn != null) {
 conn.close();
 }
 } catch (Exception e) {
 e.printStackTrace();
 }
 }
 public void closeObject2(AutoCloseable... obs) {
 try {
 for (int i = 0; i < obs.length; i++) {
 if (obs[i] != null) {
  obs[i].close();
 }
 }
 } catch (Exception e) {
 e.printStackTrace();
 }
 }

}

这里是要用到的所有方法的一个类PetManage

因为我还没学怎么合理的把各种类放到各个包，以及框架什么的，我暂时先放在一个类里面了，繁杂且无序，抱歉

package petStore1;

import java.sql.Connection;
import java.sql.SQLException;
import java.text.SimpleDateFormat;
import java.util.InputMismatchException;
import java.util.Scanner;

public class PetManage extends BaseDAO{
 public void showAll(){
 showPetName();
 showPetOwner(); 
 showPetStore();
 login();
 }

 /**
 * 显示宠物的姓名以及ID方法
 */
 public void showPetName(){
 conn=getConnection();
 String sql="SELECT ID,name from pet";
 try {
 state=conn.prepareStatement(sql);
 rs=state.executeQuery();
 System.out.println("Wonderland醒来，所有宠物从MySQL中醒来");
 System.out.println("*************************************");
 while(rs.next()){
 int id=rs.getInt("ID");
 String name=rs.getString("name");
 System.out.println("第"+id+"只宠物,名字叫："+name);
 }
 System.out.println("*************************************\n");
 } catch (Exception e) {
 e.printStackTrace();
 }finally{
 closeObject1();
 }
 
 }
 /**
 * 显示宠物主人方法
 */
 public void showPetOwner(){
 conn=getConnection();
 String sql="SELECT pet.ID,petowner.name from petowner,pet where petowner.ID=owner_id";
 try {
 state=conn.prepareStatement(sql);
 rs=state.executeQuery();
 System.out.println("所有宠物主人从MySQL中醒来");
 System.out.println("*************************************");
 while(rs.next()){
 int id=rs.getInt("pet.ID");
 String name=rs.getString("petowner.name");
 System.out.println("第"+id+"只宠物主人,名字叫："+name);
 }
 System.out.println("*************************************\n");
 } catch (Exception e) {
 e.printStackTrace();
 }finally{
 closeObject1();
 }
 }
 /**
 * 显示宠物商店方法
 */
 public void showPetStore(){
 conn=getConnection();
 String sql="SELECT name from petstore";
 try {
 state=conn.prepareStatement(sql);
 rs=state.executeQuery();
 System.out.println("所有宠物商店从MySQL中醒来");
 System.out.println("*************************************");
 while(rs.next()){
 String name=rs.getString("name");
 System.out.println("我的名字叫："+name);
 }
 System.out.println("*************************************\n");
 } catch (Exception e) {
 e.printStackTrace();
 }finally{
 closeObject1();
 }
 }

 /**
 * 登录界面选择是主人登录还是商店登录方法
 */
 public void login(){

 System.out.println("请选择输入登录模式\n1.宠物主人登录\n2.宠物商店登录\n3.退出系统\n-------------------");
 try {
 Scanner input=new Scanner(System.in);
 int choise=input.nextInt();
 if(choise<1|| choise>3){
 System.out.println("输入有误，请重新选择");
 login();
 }else{
 switch (choise) {
 case 1:
  petOwnerLogin();
  break;
 case 2:
  petStoreLogin();
  break;
 case 3:
  System.out.println("谢谢使用");
  System.exit(0);
  break;
 default:
  break;
 }
 }
 } catch (InputMismatchException e) {
 System.out.println("输入有误，请重新选择");
 login();
 }
 
 }
 /**
 * 宠物主人登录方法
 * @return
 */
 public boolean petOwnerLogin(){
 boolean flag=false;
 try {
 Scanner input=new Scanner(System.in);
 System.out.println("请先登录，请您先输入主人的名字");
 String name=input.next();
 System.out.println("请您输入主人的密码：");
 String password=input.next();
 conn=getConnection();
 String sql="SELECT name from petowner where name=? and password=?";
 try {
 state=conn.prepareStatement(sql);
 state.setString(1, name);
 state.setString(2, password);
 rs=state.executeQuery();
 if(rs.next()){
  System.out.println("---------恭喜您成功登录！---------");
  System.out.println("----------您的基本信息---------");
  conn=getConnection();
  String sql2="SELECT ID,name,money from petowner where name=?";
//  state=conn.prepareStatement(sql2);
//  state.setString(1, name);
//  rs=state.executeQuery();
  rs=search(sql2,name);
  if(rs.next()){
  int uid=rs.getInt("ID");
  String uname=rs.getString("name");
  Double uMoney=rs.getDouble("money");
  System.out.println("姓名："+uname);
  System.out.println("元宝数："+uMoney);
  System.out.print("登录成功，");
  dealPet(uname,uid);
  }
 }else{
  System.out.println("登录失败，账户与密码不匹配");
  login();
 }
 } catch (Exception e) {
 e.printStackTrace();
 }
 
 } catch (InputMismatchException e) {
 System.out.println("输入有误");
 login();
 }
 
 return false;
 }

 /**
 * 选择买宠物或者卖宠物的方法
 */
 public void dealPet(String ownerName,int uid) {

 System.out.println("您可以购买和卖出宠物，购买宠物请输入1，卖出宠物请输入2\n1.购买宠物\n2.卖出宠物\n3.返回上一级");
 try {
 Scanner input2=new Scanner(System.in);
 int choise2=input2.nextInt();
 if(choise2<1||choise2>3){
 System.out.println("输入有误");
 dealPet(ownerName,uid);
 }else{
 switch (choise2) {
  case 1:
  //购买宠物
  buyPet(ownerName,uid);
  break;
  case 2:
  //出售宠物
  showSellPet(ownerName,uid);
  break;
  case 3:
  //返回上一级
  login();
  break;
  default:
  break;
  }
 }
 } catch (InputMismatchException e) {
 System.out.println("输入有误");
 dealPet(ownerName,uid);
 }
 }
 /**
 * 显示主人拥有的宠物
 */
 public void showSellPet(String ownerName,int uid) {
 conn=getConnection();
 String sql25="SELECT pet.ID,pet.name from petowner,pet where petowner.ID=owner_id and petowner.ID="+uid+"";
 try {
 state=conn.prepareStatement(sql25);
 rs=state.executeQuery();
 System.out.println("以下是你拥有的宠物：");
// //如果结果集为空，即该主人没有宠物，就返回上一级进行选择
// if(!rs.next()){
// System.out.println("您没有宠物，将自动返回上一级");
// buyPet(ownerName, uid);
// }
 while(rs.next()){
 int petid=rs.getInt("pet.ID");
 String petName=rs.getString("pet.name");
 System.out.println("这是"+petid+"号宠物，名字叫："+petName);
 }
 System.out.println("**************************************");
 } catch (SQLException e) {
 e.printStackTrace();
 }
 closeObject1(); 
 sellPet(ownerName, uid);
 }

 public void sellPet(String ownerName,int uid) {
 System.out.println("请输入你想卖出的宠物序号：");
 try {
 Scanner input27=new Scanner(System.in);
 int choisePetId=input27.nextInt();
 System.out.println("请输入你要卖给的商店\n1.北京西苑\t2.重庆观音桥");
 int choiseStore=input27.nextInt();
 String sql30="SELECT pet.ID,pet.name from petowner,pet where petowner.ID=owner_id and petowner.ID="+uid+" and pet.ID="+choisePetId+"";
 Connection conn6=getConnection();
 try {
 state=conn6.prepareStatement(sql30);
 rs=state.executeQuery();
 if(rs.next()){
  Connection conn9=getConnection();
  conn9.setAutoCommit(false);
  String sql40="UPDATE pet set owner_id=null,store_id="+choiseStore+" where pet.ID="+choisePetId+"";
  state=conn9.prepareStatement(sql40);
  int result20=state.executeUpdate();
  String sql41="update petowner set money=money+5 where petowner.ID="+uid+"";
  state=conn9.prepareStatement(sql41);
  int result21=state.executeUpdate();
  String sql42="update petstore set balance=balance-5 where petstore.ID="+choiseStore+"";
  state=conn9.prepareStatement(sql42);
  int result22=state.executeUpdate();
  //获得当前时间
  Long time1=System.currentTimeMillis();
  SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
  String dealTime=sdf.format(time1);
  //将该条交易添加至交易账单中
  String sql43="insert into account (deal_type,pet_id,seller_id,buyer_id,price,deal_time) VALUES (2,"+choisePetId+","+choiseStore+","+uid+",5,'"+dealTime+"')";
  state=conn9.prepareStatement(sql43);
  int result23=state.executeUpdate();
  
  if(result20>0 && result21>0 && result22>0 & result23>0){
  //提交事务
  conn9.commit();
  System.out.println("卖出成功");
  }else{
  //回滚事务
  conn9.rollback();
  }
  dealPet(ownerName,uid);
 }else{
  System.out.println("没有该宠物，卖出失败");
  dealPet(ownerName,uid);
 }
 } catch (SQLException e) {
 e.printStackTrace();
 }
 
 } catch (InputMismatchException e) {
 System.out.println("输入错误，请重新输入");
 sellPet(ownerName, uid);
 }
 
 }

// /**
// * 显示新培育宠物并且购买
// */
// public void showNewPet() {
// // TODO Auto-generated method stub
// 
// }

 /**
 * 宠物商店登录的方法
 * @return
 */
 public boolean petStoreLogin(){
 boolean flag=false;
 try {
 Scanner input=new Scanner(System.in);
 System.out.println("请先登录，请您先输入宠物商店的名字");
 String name=input.next();
 System.out.println("请您输入宠物商店的密码：");
 String password=input.next();
 conn=getConnection();
 String sq110="SELECT name,balance from petstore where name=? and password=?";
 state=conn.prepareStatement(sq110);
 rs=search(sq110, name,password);
 if(rs.next()){
 System.out.println("登录成功");
 PetStoreMake(name);
 }else{
 System.out.println("登录失败");
 login();
 }
 
 } catch (Exception e) {
 // TODO: handle exception
 }
 
 return false;
 }
 /*
 * 宠物商店培育新宠物
 */
 public void PetStoreMake(String storeName) throws SQLException {
 System.out.println("请输入数字进行选择：\n1.查询店内宠物\n2.培育新宠物\n3.退出登录");
 try {
 Scanner input=new Scanner(System.in);
 int choise7=input.nextInt();
 if(choise7<1||choise7>3){
 System.out.println("输入有误");
 PetStoreMake(storeName);
 }else{
 switch (choise7) {
  case 1:
  storePetQuery(storeName);
  break;
  case 2:
  storeAddPet(storeName);
  break;
  case 3:
  //退出登录，返回上一级
  login();
  break;
 
  default:
  break;
 }
 }
 } catch (InputMismatchException e) {
 System.out.println("输入有误");
 PetStoreMake(storeName);
 }
 }

 /**
 * 宠物商店培育新宠物的方法
 * @param storeName
 * @throws SQLException
 */
 public void storeAddPet(String storeName) throws SQLException {
 System.out.println("请输入你想添加的宠物的类型：");
 Scanner input=new Scanner(System.in);
 String typename=input.next();
 System.out.println("请输入该宠物的名字：");
 String petname=input.next();
 //查询该商店的ID
 String sql14="SELECT ID from petstore where name='"+storeName+"'";
 rs=search(sql14);
 int id=0;
 if(rs.next()){
 id=rs.getInt("ID");
 }
 conn=getConnection();
 String sql13="insert into pet (name,typename,health,love,birthday,store_id,neworold)VALUES(?,?,1,100,?,"+id+",'new')";
 //获取当前时间，作为宠物的生日
 Long time1=System.currentTimeMillis();
 SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
 String birth=sdf.format(time1);
 int a=update(sql13, petname,typename,birth);
 if(a>0){
 System.out.println("培育新宠物成功");
 PetStoreMake(storeName);
 }else{
 System.out.println("培育新宠物失败");
 PetStoreMake(storeName);
 }
 }

 /**
 * 在商店登录之后进行对店内的宠物进行查询
 * @param storeName
 */
 public void storePetQuery(String storeName) {
 System.out.println("正在查询店内宠物。。。");
 conn=getConnection();
 String sql11="SELECT pet.ID,pet.name,typename,birthday from pet,petstore where petstore.name=? and pet.store_id=petstore.ID";
 try {
 state=conn.prepareStatement(sql11);
 rs=search(sql11, storeName);
 int i=1;
 while(rs.next()){
 int id=rs.getInt("pet.ID");
 String name=rs.getString("pet.name");
 String typename=rs.getString("typename");
 String birthday=rs.getString("birthday");
 System.out.println("第"+i+"只宠物名字："+name+",宠物类型："+typename+",生日："+birthday);
 i++; 
 }
 System.out.println("----------------------------");
 PetStoreMake(storeName);
 } catch (Exception e) {
 e.printStackTrace();
 }
 }

 /**
 *购买宠物的方法
 */
 public void buyPet(String ownerName,int uid){
 System.out.println("请输入选择购买范围，只输入选择项的序号");
 System.out.println("1:购买库存宠物\n2.购买新培育宠物\n3.返回上一级");
 try {
 Scanner input3=new Scanner(System.in);
 int choise5=input3.nextInt();
 if(choise5<1 || choise5>3){
 System.out.println("输入有误");
 buyPet(ownerName,uid);
 }else{
 switch (choise5) {
 case 1:
  showPetAll(ownerName,uid);
  break;
 case 2:
  buyNewPet(ownerName,uid);
  break;
 case 3:
  //返回上一级
  dealPet(ownerName, uid);
  break;
 
 default:
  break;
 }
 }
 
 
 } catch (InputMismatchException e) {
 System.out.println("输入有误");
 buyPet(ownerName,uid);
 
 }
 }

 public void buyNewPet(String ownerName,int uid) {
 //用于判断查询是否有结果
 boolean havePet=false;
 
 System.out.println("正在帮你查询新宠物。。。。。");
 conn=getConnection();
 String sql31="SELECT pet.ID,pet.name from pet where pet.neworold='new'";
 try {
 state=conn.prepareStatement(sql31);
 rs=state.executeQuery();
 while(rs.next()){
 int petid=rs.getInt("pet.ID");
 String petName=rs.getString("pet.name");
 System.out.println("序号为："+petid+",名字为："+petName);
 havePet=true;
 }
 if(havePet){
 System.out.println("请输入你要购买的新宠物的序号：");
 try {
//  boolean havePet2=false;
  Scanner input28=new Scanner(System.in);
  int newPetId=input28.nextInt();
  Connection conn7=getConnection();
  String sql32="SELECT pet.ID,pet.name,pet.store_id from pet where pet.neworold='new' and pet.ID="+newPetId+"";
  state=conn7.prepareStatement(sql32);
  rs=state.executeQuery();
  if(rs.next()){
  int storeid=rs.getInt("pet.store_id");
  
  
  Connection conn8=getConnection();
  conn8.setAutoCommit(false);
  
  String sql33="UPDATE pet set pet.neworold='old',pet.owner_id="+uid+",pet.store_id=null where pet.ID="+newPetId+"";
  String sql34="update petowner set money=money-5 where petowner.ID="+uid+"";
  String sql35="update petstore set balance=balance+5 where petstore.ID="+storeid+"";
  
  //获得当前时间
  Long time1=System.currentTimeMillis();
  SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
  String dealTime=sdf.format(time1);
  //将该条交易添加至交易账单中
  String sql36="insert into account (deal_type,pet_id,seller_id,buyer_id,price,deal_time) VALUES (1,"+newPetId+","+storeid+","+uid+",5,'"+dealTime+"')";
  
  state=conn8.prepareStatement(sql33);
  int result13=state.executeUpdate();
  state=conn8.prepareStatement(sql34);
  int result14=state.executeUpdate();
  state=conn8.prepareStatement(sql35);
  int result15=state.executeUpdate();
  state=conn8.prepareStatement(sql36);
  int result16=state.executeUpdate();
  if(result13>0 && result14>0 && result15>0 && result16>0){
  //如果都成功执行，改变数据，那就提交事务
  conn8.commit();
  System.out.println("购买成功");
  }else{
  //如果中加你有一条没有执行成功那就回滚事务
  conn8.rollback();
  }
  buyPet(ownerName, uid);
  }else{
  System.out.println("输入错误，没有该序号的新宠物");
  buyNewPet(ownerName, uid);
  }
 } catch (InputMismatchException e) {
  e.printStackTrace();
 }
 }else{
 System.out.println("暂时还没新宠物");
 buyPet(ownerName, uid);
 }
 } catch (SQLException e) {
 
 e.printStackTrace();
 }
 }

 /**
 * 展示宠物名字，序号，类型的方法
 */
 public void showPetAll(String ownerName,int uid) {
 System.out.println("---------以下是库存宠物--------");
 conn=getConnection();
 String sql6="SELECT pet.ID,pet.name,pet.typename from pet,petstore where pet.store_id=petstore.ID";
 try {
 state=conn.prepareStatement(sql6);
 rs=state.executeQuery();
 while(rs.next()){
 int petId=rs.getInt("ID");
 String petName=rs.getString("name");
 String petType=rs.getString("typename");
 System.out.println("序号："+petId+"，我的名字叫:"+petName+"，我是："+petType+",要购买我要花：5.0个元宝");
 }
 System.out.println("请输入你想购买的宠物编号：");
 try {
 Scanner input17=new Scanner(System.in);
 int choise6=input17.nextInt();
 //对在商店里的宠物进行ID查询，符合的就购买
 conn=getConnection();
 String sql15="SELECT pet.ID,pet.name,pet.typename,petstore.ID from pet,petstore where pet.store_id=petstore.ID and pet.ID="+choise6+"";
 try {
  state=conn.prepareStatement(sql15);
  rs=state.executeQuery();
  if(rs.next()){
  //这里是宠物主人购买宠物的代码，将宠物的store_ID设置为null，将宠物的owner_ID设置为购买主人的ID
  //然后主人账户减钱，商店的结余加钱,将该条交易添加至交易账单中
  int store_id=rs.getInt("petstore.ID");//这里是选择的宠物所属商店的ID
  //这里用创建一个新的连接
  Connection conn1=getConnection();
  //开启事务
  conn1.setAutoCommit(false);
  //将宠物的store_ID设置为null，将宠物的owner_ID设置为购买主人的ID
  String sql18="update pet set owner_id=1,store_id=NULL where pet.ID="+choise6+"";
  //宠物主人减钱
  String sql19="update petowner set money=money-5 where petowner.ID="+uid+"";
  //宠物商店加钱
  String sql20="update petstore set balance=balance+5 where petstore.ID="+store_id+"";
  //获得当前时间
  Long time1=System.currentTimeMillis();
  SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
  String dealTime=sdf.format(time1);
  //将该条交易添加至交易账单中
  String sql21="insert into account (deal_type,pet_id,seller_id,buyer_id,price,deal_time) VALUES (1,"+choise6+","+store_id+","+uid+",5,'"+dealTime+"')";
  
  state=conn1.prepareStatement(sql18);
  int result2=state.executeUpdate();
  state=conn1.prepareStatement(sql19);
  int result3=state.executeUpdate();
  state=conn1.prepareStatement(sql20);
  int result4=state.executeUpdate();
  state=conn1.prepareStatement(sql21);
  int result5=state.executeUpdate();
  if(result2>0 && result3>0 && result4>0 && result5>0){
  //如果都成功执行，改变数据，那就提交事务
  conn1.commit();
  System.out.println("购买成功");
  }else{
  //如果中加你有一条没有执行成功那就回滚事务
  conn1.rollback();
  }
  
  //返回上一级
  buyPet(ownerName,uid);
  }else{
  System.out.println("购买失败");
  //返回上一级
  buyPet(ownerName,uid);
  }
 } catch (SQLException e) {
  e.printStackTrace();
 }
 } catch (InputMismatchException e) {
 System.out.println("输入有误");
 showPetAll(ownerName,uid);
 
 }
 } catch (SQLException e) {
 e.printStackTrace();
 }
 
 
 }
 
}

我是一个java学习路上的小白，现在才刚刚开始学，以后学习的路还有很远，用刚学的jdbc来做了一个案例，做的不好的见谅，因为我也没时间去进行优化、升级，只是希望写在这里以后我还能有个回忆，以及给看的人可能带来一点点小收获。

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