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完善DAO层，重构代码，添加了登录功能，修改了一堆bug，具体见日志

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This commit is contained in:
twinkle255 2023-05-07 21:07:58 +08:00 committed by myh
parent b84218d0f9
commit ab306eff80
16 changed files with 256 additions and 140 deletions
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11
README.md
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@ -1,7 +1,6 @@
# Homework
- - -
**Last Update Time : 2023-05-05**
**Last Update Time : 2023-05-07 21:06**
日志文件：`log.md`
- - -
### 运行方式：
@ -12,7 +11,13 @@ src -> main -> java -> example -> App.run()
- `userDAO`和`merchantsDAO`中`update`语句未传参
- 未测试非法数据
- 已测试NULL值
- 已测试插入数据库时，空白符和换行符的检测
### 待完成功能
- 感觉好像少了个菜品类，实体类好像还得改，服了
- 联合查询
- 是的，我发现了，这个实体关系是真的乱，现在竟然用户点菜的时候需要自己设置折扣，太离谱了，以后再改叭。。。
- 再加个菜品类上面这个问题估计就解决了
- 订单和菜品DAO层的update功能
- `updata`方法更新指定字段
- 用户密码的查询和修改
> 暂时就这样了，力不从心了，以后再改吧呜呜呜~

15
log.md
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@ -1,7 +1,22 @@
# Homework
*网安实训作业*
## 2023-05-08-NO.2
**重大更新！**
- 修改了超级无敌多的bug
- 新建订单无法点菜bug
- 点菜模块无法自动计算总价bug
- 还有其它一些小bug，不多说了
- 增加了一部分非法值检测
- 增加了用户登录功能
- DAO层操作逻辑修改（主要是新建订单部分）
- 新加用户操作模块
## 2023-05-07-NO.1
- DAO层完成
- 重构代码
- DAO层方法整合

2
src/main/java/dao/specification/abstractDAO.java
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@ -17,7 +17,7 @@ public class abstractDAO<T> {
ct = getConnection();
ps = ct.prepareStatement(sql);
ps.setLong(1, id);
flag = ps.executeUpdate(sql);
flag = ps.executeUpdate();
} catch (SQLException e) {
throw new RuntimeException(e);
} finally {

81
src/main/java/dao/specification/indentDAO.java
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@ -2,16 +2,13 @@ package dao.specification;
import dao.indentAbstractDAO;
import entities.Indent;
import entities.Merchants;
import entities.Users;
import org.jetbrains.annotations.NotNull;
import view.IndentItemView;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import static dao.specification.abstractDAO.Delete;
import static util.SQLDatabaseConnection.close;
@ -26,19 +23,45 @@ public class indentDAO implements indentAbstractDAO {
@Override
public int insert(@NotNull Indent indent) {
int flag;
//@FIXME 这个allPrice总价怎么用SQL跨表求和啊超
String insert_sql = "insert into Indent(userID, merchantsID, allPrice, message, createDate) " +
"values(?,?,?,?,getdate())";
//FIXME
String insert_sql = "insert into Indent(userID, merchantsID,allPrice, message, createDate) " +
"values(?,?,0,?,getdate()) ";
String SetAllPrice = "update Indent " +
"set allPrice = (select SUM(finalPrice) " +
"from indentItem where Indent.id = indentItem.indentID group by indentID)" +
"from indentItem where indentID = Indent.id and Indent.id = ?";
String selectID = "select MAX(Indent.id) from Indent";
try {
IndentItemView iiv = new IndentItemView();
connection = getConnection();
preparedStatement = connection.prepareStatement(insert_sql);
//用户ID
preparedStatement.setLong(1, indent.getUserID().getId());
//商家ID
preparedStatement.setLong(2, indent.getMerchantsID().getId());
//备注
if (indent.getMessage() != null && !Objects.equals(indent.getMessage(), " ")) {
preparedStatement.setString(3, indent.getMessage());
} else {
preparedStatement.setNull(3, Types.NVARCHAR);
}
preparedStatement.setObject(1, indent.getUserID());
preparedStatement.setObject(2, indent.getMerchantsID());
preparedStatement.setFloat(3, indent.getAllPrice());
preparedStatement.setString(4, indent.getMessage());
flag = preparedStatement.executeUpdate();
flag = preparedStatement.executeUpdate(insert_sql);
//创建订单中的菜品
preparedStatement = connection.prepareStatement(selectID);
resultSet = preparedStatement.executeQuery();
//新的订单对象，获取当前订单ID
indent = new Indent();
while (resultSet.next()) {
indent.setId(resultSet.getLong(1));
iiv.CreateIItem(indent.getId());
}
//更新总价
preparedStatement = connection.prepareStatement(SetAllPrice);
preparedStatement.setLong(1, indent.getId());
preparedStatement.executeUpdate();
} catch (SQLException e) {
throw new RuntimeException(e);
@ -52,20 +75,6 @@ public class indentDAO implements indentAbstractDAO {
@Override
public int delete(@NotNull Indent indent) {
String delete_sql = "delete from Indent where id = ?";
// int flag;
// try {
// connection = getConnection();
// preparedStatement = connection.prepareStatement(delete_sql);
//
// preparedStatement.setLong(1, indent.getId());
//
// flag = preparedStatement.executeUpdate(delete_sql);
//
// } catch (SQLException e) {
// throw new RuntimeException(e);
// } finally {
// close(connection, preparedStatement, resultSet);
// }
return Delete
(connection, preparedStatement, resultSet, delete_sql, indent.getId());
}
@ -86,7 +95,7 @@ public class indentDAO implements indentAbstractDAO {
preparedStatement.setString(4, indent.getMessage());
preparedStatement.setLong(5, indent.getId());
flag = preparedStatement.executeUpdate(update_sql);
flag = preparedStatement.executeUpdate();
} catch (SQLException e) {
throw new RuntimeException(e);
}
@ -102,8 +111,7 @@ public class indentDAO implements indentAbstractDAO {
try {
connection = getConnection();
preparedStatement = connection.prepareStatement(selectAll_sql);
resultSet = preparedStatement.executeQuery(selectAll_sql);
resultSet = preparedStatement.executeQuery();
while (resultSet.next()) {
indent = new Indent();
@ -129,7 +137,7 @@ public class indentDAO implements indentAbstractDAO {
connection = getConnection();
preparedStatement = connection.prepareStatement(selectID_sql);
preparedStatement.setLong(1, id);
preparedStatement.executeQuery(selectID_sql);
resultSet = preparedStatement.executeQuery();
while (resultSet.next()) {
indent = new Indent();
@ -146,8 +154,13 @@ public class indentDAO implements indentAbstractDAO {
private void SetAttribute(@NotNull Indent indent, @NotNull ResultSet rs) throws SQLException {
indent.setId(rs.getLong("id"));
indent.setUserID((Users) rs.getObject("userID"));
indent.setMerchantsID((Merchants) rs.getObject("merchantsID"));
//结果集是 Long 型数据
userDAO user = new userDAO();
indent.setUserID(user.searchID(rs.getLong("userID")));
merchantsDAO merchant = new merchantsDAO();
indent.setMerchantsID(merchant.searchID(rs.getLong("merchantsID")));
indent.setAllPrice(rs.getFloat("allPrice"));
indent.setMessage(rs.getString("message"));
indent.setCreatedDate(rs.getDate("createDate"));

30
src/main/java/dao/specification/indentItemDAO.java
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@ -18,11 +18,12 @@ public class indentItemDAO implements indentItemAbstractDAO {
private PreparedStatement preparedStatement = null;
private ResultSet resultSet = null;
//TODO 这里逻辑不对，用户点菜的时候不能自己设置折扣，可能需要再多一个实体才可以
@Override
public int insert(@NotNull IndentItem IItem) {
int flag;
String insert_sql = "insert into indentItem(name, initialPrice, discount, " +
"finalPrice, description, indentID) values (?,?,?,?,?,null)";
"finalPrice, description, indentID) values (?,?,?,?,?,?)";
try {
connection = getConnection();
preparedStatement = connection.prepareStatement(insert_sql);
@ -30,23 +31,25 @@ public class indentItemDAO implements indentItemAbstractDAO {
preparedStatement.setString(1, IItem.getName());
preparedStatement.setFloat(2, IItem.getInitialPrice());
//折扣和折后价null值的判断
if (IItem.getDiscount().compareTo(0F) > 0 //折扣和0比较,返回1为合法值
|| !String.valueOf(IItem.getDiscount()).equals(" ")) {
if (IItem.getDiscount().compareTo(0F) > 0) {//折扣和0比较,返回1为合法值
preparedStatement.setFloat(3, IItem.getDiscount());
IItem.setFinalPrice(IItem.getInitialPrice() * IItem.getDiscount());//计算最终价格
preparedStatement.setFloat(4, IItem.getFinalPrice());
} else {
preparedStatement.setNull(3, Types.FLOAT);
preparedStatement.setNull(4, Types.FLOAT);
//最终价格等于初始价格
preparedStatement.setFloat(4, IItem.getInitialPrice());
}
//描述
if (!IItem.getDescription().equals(" ")) {
if (IItem.getDescription() != null && !IItem.getDescription().equals(" ")) {
preparedStatement.setString(5, IItem.getDescription());
} else {
preparedStatement.setNull(5, Types.NVARCHAR);
}
//菜单ID
preparedStatement.setObject(6, IItem.getIndentID().getId());
flag = preparedStatement.executeUpdate(insert_sql);
flag = preparedStatement.executeUpdate();
} catch (SQLException e) {
throw new RuntimeException(e);
} finally {
@ -55,23 +58,10 @@ public class indentItemDAO implements indentItemAbstractDAO {
return flag;
}
@Override
public int delete(@NotNull IndentItem IItem) {
String delete_sql = "delete from indentItem where id = ?";
// int flag;
// try {
// connection = getConnection();
// preparedStatement = connection.prepareStatement(delete_sql);
// preparedStatement.setLong(1, item.getId());
// flag = preparedStatement.executeUpdate(delete_sql);
//
// } catch (SQLException e) {
// throw new RuntimeException(e);
// } finally {
// close(connection,preparedStatement,resultSet);
// }
//
// return flag;
return Delete
(connection, preparedStatement, resultSet, delete_sql, IItem.getId());
}

15
src/main/java/dao/specification/merchantsDAO.java
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@ -57,19 +57,6 @@ public class merchantsDAO implements merchantsAbstractDAO {
@Override
public int delete(@NotNull Merchants merchants) {
String delete_sql = "delete from Merchants where id = ?";
// int flag = 0;
// try {
// connection = getConnection();
//
// preparedStatement = connection.prepareStatement(delete_sql);
// preparedStatement.setLong(1, merchants.getId());
//
// flag = preparedStatement.executeUpdate();
// } catch (Exception e) {
// e.printStackTrace();
// } finally {
// close(connection, preparedStatement, resultSet);
// }
return Delete
(connection, preparedStatement, resultSet, delete_sql, merchants.getId());
}
@ -92,7 +79,7 @@ public class merchantsDAO implements merchantsAbstractDAO {
preparedStatement.setString(4, merchants.getPhoneNumber());
preparedStatement.setLong(5, merchants.getId());
flag = preparedStatement.executeUpdate(update_sql);
flag = preparedStatement.executeUpdate();
} catch (SQLException e) {
throw new RuntimeException(e);
}

13
src/main/java/dao/specification/userDAO.java
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@ -48,19 +48,6 @@ public class userDAO implements userAbstractDAO {
@Override
public int delete(@NotNull Users user) {
String delete_sql = "delete from Users where id=?";
// int flag;
// try {
// connection = getConnection();
//
// preparedStatement = connection.prepareStatement(delete_sql);
// preparedStatement.setLong(1, users.getId());
//
// flag = preparedStatement.executeUpdate();
// } catch (SQLException e) {
// throw new RuntimeException(e);
// } finally {
// close(connection, preparedStatement, resultSet);
// }
return Delete
(connection, preparedStatement, resultSet, delete_sql, user.getId());

2
src/main/java/entities/Indent.java
View File

@ -11,7 +11,7 @@ public class Indent {
private Float allPrice;//菜品总价
Date createdDate;//订单创建时间
String message;//下单备注
private String message;//下单备注
private Users userID;//外键，下单用户ID
private Merchants merchantsID;//外键，餐厅ID

48
src/main/java/entities/dto/Login.java Normal file
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@ -0,0 +1,48 @@
package entities.dto;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Scanner;
import static util.SQLDatabaseConnection.close;
import static util.SQLDatabaseConnection.getConnection;
import static view.CommonUse.CreateIndent;
public class Login {
static Connection conn = null;
static PreparedStatement ps = null;
static ResultSet rs = null;
public static boolean UserLogin(Long id) {
boolean flag = false;
String sql = "select password from Users where id = ?";
try {
conn = getConnection();
ps = conn.prepareStatement(sql);
ps.setLong(1, id);
rs = ps.executeQuery();
if (!rs.next()) {
//TODO ID输入不正确后重新输入，但是这个函数调用的太乱了，有点偷懒了，有机会改一下
System.out.println("查无此人");
CreateIndent();//跳转到登录选项重新输入ID
}
Scanner reader = new Scanner(System.in);
System.out.println("请输入登录密码：");
String password = reader.nextLine();
while (rs.next()) {
flag = password.equals(rs.getString("password"));
}
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
close(conn, ps, rs);
}
return flag;
}
}

1
src/main/java/util/Toolset.java
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@ -94,5 +94,4 @@ public class Toolset {
return fields;
}
}

56
src/main/java/view/CommonUse.java Normal file
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@ -0,0 +1,56 @@
package view;
import java.util.Scanner;
import static entities.dto.Login.UserLogin;
//用户日常使用
public class CommonUse {
public void use(int chose) {
switch (chose) {
case 0 -> System.exit(0);
case 1 -> CreateIndent();
}
}
//TODO 这个部分和 Login 有点重合，代码可以重构一下
public static void CreateIndent() {
Scanner reader = new Scanner(System.in);
Long userID = null;
System.out.println("请输入你的ID:");
//异常处理
try {
userID = reader.nextLong();
} catch (Exception e) {
System.out.println("你输入的ID不正确!\n你想退出吗？(Y/n)");
reader = new Scanner(System.in);
String s = reader.next();
if (s.equals("Y")) {
System.exit(0);
} else {
CreateIndent();
}
}
while (true) {
//密码判断
boolean flag = UserLogin(userID);
if (flag) {
IndentView iv = new IndentView();
iv.CreateIndent(userID);
break;
} else {
System.out.println("你输入的密码不正确~\n你想退出吗？(Y/n)");
reader = new Scanner(System.in);
String s = reader.next();
if (s.equals("Y")) {
System.exit(0);
}
}
}
}
}

30
src/main/java/view/IndentItemView.java
View File

@ -7,6 +7,7 @@ import entities.IndentItem;
import util.Toolset;
import java.util.Date;
import java.util.Objects;
import java.util.Scanner;
public class IndentItemView {
@ -14,34 +15,41 @@ public class IndentItemView {
switch (chose) {
case 0 -> System.exit(0);
case 1 -> CreateIItem();
case 2 -> DeleteIItem();
case 3 -> UpdateIItem();
case 4 -> SearchIItem(true);//查询全部
case 5 -> SearchIItem(false);//查询ID
case 1 -> DeleteIItem();
case 2 -> UpdateIItem();
case 3 -> SearchIItem(true);//查询全部
case 4 -> SearchIItem(false);//查询ID
}
}
private void CreateIItem() {
public void CreateIItem(Long indentID) {
indentItemAbstractDAO DML_insert = new indentItemDAO();
Scanner reader = new Scanner(System.in);
IndentItem IItem = new IndentItem();
System.out.println("请输入：菜名|初始价格|折扣|描述 退出请输入end");
System.out.println("请输入：菜名|初始价格|折扣|描述|菜单ID");
int flag = 0;
while (!reader.hasNext("end")) {
IndentItem IItem = new IndentItem();
//菜名
IItem.setName(reader.nextLine());
IItem.setName(reader.next());
//初始价格
IItem.setInitialPrice(reader.nextFloat());
//折扣
if (reader.hasNextFloat()) {
IItem.setDiscount(reader.nextFloat());
} else {
IItem.setDiscount(-1F);
}
//描述
if (!reader.hasNext("end") && !Objects.equals(reader.nextLine(), " ")) {
IItem.setDescription(reader.nextLine());
}
//菜单ID
Long indentID = reader.nextLong();
indentDAO indent = new indentDAO();
IItem.setIndentID(indent.searchID(indentID));
int flag = DML_insert.insert(IItem);
flag += DML_insert.insert(IItem);
}
System.out.println(flag + "行受影响");
}

26
src/main/java/view/IndentView.java
View File

@ -5,45 +5,40 @@ import dao.specification.indentDAO;
import dao.specification.merchantsDAO;
import dao.specification.userDAO;
import entities.Indent;
import entities.IndentItem;
import entities.Users;
import util.Toolset;
import java.util.List;
import java.util.Scanner;
public class IndentView {
public void IndentDB(int chose) throws IllegalAccessException {
//TODO 这个交互有点难搞
switch (chose) {
case 0 -> System.exit(0);
case 1 -> CreateIndent();
case 2 -> DeleteIndent();
case 3 -> UpdateIndent();
case 4 -> SearchIndent(true);//查询全部
case 5 -> SearchIndent(false);//按ID查询
case 1 -> DeleteIndent();
case 2 -> System.out.println("这个功能还在修复呢，小主先看看其它功能吧~");//UpdateIndent();
case 3 -> SearchIndent(true);//查询全部
case 4 -> SearchIndent(false);//按ID查询
}
}
private void CreateIndent() {
indentAbstractDAO DML_insert = new indentDAO();
public void CreateIndent(Long userID) {
Scanner reader = new Scanner(System.in);
Indent indent = new Indent();
System.out.println("请输入：下单用户id|餐厅id|总价|备注");
System.out.println("请输入：下单餐厅id|备注");
//用户
Long userID = reader.nextLong();
userDAO user = new userDAO();
indent.setUserID(user.searchID(userID));
//餐厅
Long merchantID = reader.nextLong();
merchantsDAO merchant = new merchantsDAO();
indent.setMerchantsID(merchant.searchID(merchantID));
//总价
indent.setAllPrice(reader.nextFloat());
//备注
indent.setMessage(reader.nextLine());
indentAbstractDAO DML_insert = new indentDAO();
int flag = DML_insert.insert(indent);
System.out.println(flag + "行受影响");
}
@ -53,7 +48,7 @@ public class IndentView {
Scanner reader = new Scanner(System.in);
Indent indent = new Indent();
System.out.println("请输入你要删除的ID");
System.out.println("请输入你要删除的订单ID");
indent.setId(reader.nextLong());
int flag = DML_delete.delete(indent);
@ -79,4 +74,5 @@ public class IndentView {
System.out.println(Toolset.table(Indent.class, indent));
}
}
}

6
src/main/java/view/MerchantsView.java
View File

@ -7,6 +7,7 @@ import util.Toolset;
import java.util.Scanner;
//商家管理
public class MerchantsView {
//商家数据库操作
protected void merchantsDB(int chose) throws IllegalAccessException {
@ -14,7 +15,7 @@ public class MerchantsView {
case 0 -> System.exit(0);
case 1 -> CreateMerchant();
case 2 -> DeleteMerchant();
case 3 -> UpdateMerchant();
case 3 -> System.out.println("这个功能还在修复呢，小主先看看其它功能吧~");//UpdateMerchant();
case 4 -> SearchMerchant(true);//查询所有
case 5 -> SearchMerchant(false);//查询ID
}
@ -44,7 +45,8 @@ public class MerchantsView {
System.out.println(flag + "行受影响");
}
private void UpdateMerchant() {//@FIXME update没有传值
//@FIXME update没有传值
private void UpdateMerchant() {
Merchants merchants = new Merchants();
Scanner reader = new Scanner(System.in);

3
src/main/java/view/UserView.java
View File

@ -7,6 +7,7 @@ import util.Toolset;
import java.util.Scanner;
//TODO 用户密码查找和修改
public class UserView {
//用户数据库操作
protected void userDB(int chose) throws IllegalAccessException {
@ -22,7 +23,7 @@ public class UserView {
}
}
private void CreateUser() {//@TODO 非换行输入
private void CreateUser() {//TODO 非换行输入
Scanner reader = new Scanner(System.in);
userAbstractDAO DML_insert = new userDAO();

31
src/main/java/view/shellUI.java
View File

@ -10,7 +10,6 @@ public class shellUI {
-----------------后台管理系统---------------
------------------------------------------
""");
Chose();
}
@ -18,7 +17,9 @@ public class shellUI {
private static void Chose() throws IllegalAccessException {
System.out.println("""
请选择你要进行的功能:
1.商家管理\t2.用户管理\t3.订单管理\t0.退出
1.商家管理\t2.用户管理\t3.订单管理
4.我是用户，我要登录\t
0.退出
""");
switch (Toolset.option()) {
@ -28,7 +29,8 @@ public class shellUI {
System.out.println("""
请选择你想使用的功能:
1.新建商家\t\t2.删除商家\t\t3.更新信息
4.查询所有商家\t5.根据ID查询商家\t0.退出
4.查询所有商家\t5.根据ID查询商家
0.退出
""");
MerchantsView merchants_view = new MerchantsView();
merchants_view.merchantsDB(Toolset.option());
@ -39,7 +41,8 @@ public class shellUI {
System.out.println("""
请选择你想使用的功能:
1.新建用户\t\t2.删除用户\t\t3.更新信息
4.查询所有用户\t5.根据ID查询用户\t0.退出
4.查询所有用户\t5.根据ID查询用户
0.退出
""");
UserView user_view = new UserView();
user_view.userDB(Toolset.option());
@ -49,20 +52,26 @@ public class shellUI {
case 3 -> {
System.out.println("""
请选择你想使用的功能:
1.新建订单\t\t2.删除订单\t\t3.更新订单
4.查询所有订单\t5.根据ID查询订单\t0.退出
1.删除订单\t\t2.更新订单
3.查询所有订单\t4.根据ID查询订单
0.退出
""");
IndentView indent_view = new IndentView();
indent_view.IndentDB(Toolset.option());
Chose();
}
//订单菜品
//下单
case 4 -> {
System.out.println("""
请选择你想使用的功能:
1.点菜
0.退出
其它功能还在开发中呢，请耐心等待哦~
""");
CommonUse user = new CommonUse();
user.use(Toolset.option());
Chose();
}
}
}
}