重构代码，DAO层全部完成

README.md

@@ -11,7 +11,8 @@ src -> main -> java -> example -> App.run()
 ### 待修复bug
 - `userDAO`和`merchantsDAO`中`update`语句未传参
 - 未测试非法数据
+  - 已测试NULL值
 ### 待完成功能
-- `indentDAO`和`indentItemDAO`方法实现
+- 感觉好像少了个菜品类，实体类好像还得改，服了
 - 联合查询
 - `updata`方法更新指定字段

log.md

@@ -1,6 +1,13 @@
 # Homework
 
 *网安实训作业*
+## 2023-05-07-NO.1
+- DAO层完成
+- 重构代码
+  - DAO层方法整合
+  - switch case 模块方法提取重构
+- NULL值检测和插入
+- **我恨DDL**
 
 ## 2023-05-05-NO.2
 

src/main/java/dao/IndentAbstractDAO.java

@@ -1,7 +0,0 @@
-package dao;
-
-import entities.Indent;
-
-public interface IndentAbstractDAO extends abstractDAO<Indent> {
-
-}

src/main/java/dao/indentAbstractDAO.java

@@ -0,0 +1,7 @@
+package dao;
+
+import entities.Indent;
+
+public interface indentAbstractDAO extends abstractDAO<Indent> {
+
+}

src/main/java/dao/indentItemAbstractDAO.java

@@ -1,7 +1,7 @@
 package dao;
 
-import entities.indentItem;
+import entities.IndentItem;
 
-public interface indentItemAbstractDAO extends abstractDAO<indentItem> {
+public interface indentItemAbstractDAO extends abstractDAO<IndentItem> {
 
 }

src/main/java/dao/specification/abstractDAO.java

@@ -1,5 +1,28 @@
 package dao.specification;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+import static util.SQLDatabaseConnection.close;
+import static util.SQLDatabaseConnection.getConnection;
+
 //@TODO 重构代码 合并userDAO和merchantsDAO中重复方法
 public class abstractDAO<T> {
+    public static int Delete(Connection ct, PreparedStatement ps, ResultSet rs,
+                             String sql, Long id) {
+        int flag;
+        try {
+            ct = getConnection();
+            ps = ct.prepareStatement(sql);
+            ps.setLong(1, id);
+            flag = ps.executeUpdate(sql);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            close(ct, ps, rs);
+        }
+        return flag;
+    }
 }

src/main/java/dao/specification/indentDAO.java

@@ -1,34 +1,155 @@
 package dao.specification;
 
-import dao.IndentAbstractDAO;
+import dao.indentAbstractDAO;
 import entities.Indent;
+import entities.Merchants;
+import entities.Users;
+import org.jetbrains.annotations.NotNull;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.List;
 
-public class indentDAO implements IndentAbstractDAO {
+import static dao.specification.abstractDAO.Delete;
+import static util.SQLDatabaseConnection.close;
+import static util.SQLDatabaseConnection.getConnection;
+
+public class indentDAO implements indentAbstractDAO {
+
+    private Connection connection = null;
+    private PreparedStatement preparedStatement = null;
+    private ResultSet resultSet = null;
 
     @Override
-    public int insert(Indent indent) {
-        return 0;
+    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())";
+        try {
+            connection = getConnection();
+            preparedStatement = connection.prepareStatement(insert_sql);
+
+            preparedStatement.setObject(1, indent.getUserID());
+            preparedStatement.setObject(2, indent.getMerchantsID());
+            preparedStatement.setFloat(3, indent.getAllPrice());
+            preparedStatement.setString(4, indent.getMessage());
+
+            flag = preparedStatement.executeUpdate(insert_sql);
+
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            close(connection, preparedStatement, resultSet);
+        }
+
+        return flag;
     }
 
     @Override
-    public int delete(Indent indent) {
-        return 0;
+    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());
     }
 
     @Override
-    public int update(Indent indent) {
-        return 0;
+    public int update(@NotNull Indent indent) {
+        int flag;
+        String update_sql = "update Indent " +
+                "set userID = ?, merchantsID = ?, allPrice = ?, message = ?, " +
+                "createDate = getdate() where id = ?";
+        try {
+            connection = getConnection();
+            preparedStatement = connection.prepareStatement(update_sql);
+
+            preparedStatement.setObject(1, indent.getUserID());
+            preparedStatement.setObject(2, indent.getMerchantsID());
+            preparedStatement.setFloat(3, indent.getAllPrice());
+            preparedStatement.setString(4, indent.getMessage());
+            preparedStatement.setLong(5, indent.getId());
+
+            flag = preparedStatement.executeUpdate(update_sql);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+
+        return flag;
     }
 
     @Override
     public List<Indent> search(Indent indent) {
-        return null;
+        List<Indent> list = new ArrayList<>();
+        String selectAll_sql = "select * from Indent";
+
+        try {
+            connection = getConnection();
+            preparedStatement = connection.prepareStatement(selectAll_sql);
+
+            resultSet = preparedStatement.executeQuery(selectAll_sql);
+
+            while (resultSet.next()) {
+                indent = new Indent();
+                SetAttribute(indent, resultSet);
+                list.add(indent);
+            }
+
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            close(connection, preparedStatement, resultSet);
+        }
+
+        return list;
     }
 
     @Override
     public Indent searchID(Long id) {
-        return null;
+        Indent indent = null;
+        String selectID_sql = "select * from Indent where id = ?";
+
+        try {
+            connection = getConnection();
+            preparedStatement = connection.prepareStatement(selectID_sql);
+            preparedStatement.setLong(1, id);
+            preparedStatement.executeQuery(selectID_sql);
+
+            while (resultSet.next()) {
+                indent = new Indent();
+                SetAttribute(indent, resultSet);
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            close(connection, preparedStatement, resultSet);
+        }
+
+        return indent;
+    }
+
+    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"));
+        indent.setAllPrice(rs.getFloat("allPrice"));
+        indent.setMessage(rs.getString("message"));
+        indent.setCreatedDate(rs.getDate("createDate"));
     }
 }

src/main/java/dao/specification/indentItemDAO.java

@@ -1,4 +1,137 @@
 package dao.specification;
 
-public class indentItemDAO {
+import dao.indentItemAbstractDAO;
+import entities.IndentItem;
+import org.jetbrains.annotations.NotNull;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+
+import static dao.specification.abstractDAO.Delete;
+import static util.SQLDatabaseConnection.close;
+import static util.SQLDatabaseConnection.getConnection;
+
+public class indentItemDAO implements indentItemAbstractDAO {
+
+    private Connection connection = null;
+    private PreparedStatement preparedStatement = null;
+    private ResultSet resultSet = null;
+
+    @Override
+    public int insert(@NotNull IndentItem IItem) {
+        int flag;
+        String insert_sql = "insert into indentItem(name, initialPrice, discount, " +
+                "finalPrice, description, indentID) values (?,?,?,?,?,null)";
+        try {
+            connection = getConnection();
+            preparedStatement = connection.prepareStatement(insert_sql);
+
+            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(" ")) {
+                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);
+            }
+            //描述
+            if (!IItem.getDescription().equals(" ")) {
+                preparedStatement.setString(5, IItem.getDescription());
+            } else {
+                preparedStatement.setNull(5, Types.NVARCHAR);
+            }
+
+            flag = preparedStatement.executeUpdate(insert_sql);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            close(connection, preparedStatement, resultSet);
+        }
+        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());
+    }
+
+
+    @Override//TODO 这个要考虑的太多了，先跳过去
+    public int update(IndentItem IItem) {
+        return 0;
+    }
+
+    @Override
+    public List<IndentItem> search(IndentItem IItem) {
+        List<IndentItem> list = new ArrayList<>();
+        String selectAll_sql = "select * from indentItem";
+        try {
+            connection = getConnection();
+            preparedStatement = connection.prepareStatement(selectAll_sql);
+            preparedStatement.executeQuery();
+
+            while (resultSet.next()) {
+                IItem = new IndentItem();
+                SetAttribute(IItem, resultSet);
+                list.add(IItem);
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            close(connection, preparedStatement, resultSet);
+        }
+        return list;
+    }
+
+    @Override
+    public IndentItem searchID(Long id) {
+        IndentItem IItem = null;
+        String selectID_sql = "select * from indentItem where id = ?";
+        try {
+            connection = getConnection();
+            preparedStatement = connection.prepareStatement(selectID_sql);
+            preparedStatement.setLong(1, id);
+            preparedStatement.executeQuery();
+            while (resultSet.next()) {
+                IItem = new IndentItem();
+                SetAttribute(IItem, resultSet);
+            }
+
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            close(connection, preparedStatement, resultSet);
+        }
+        return IItem;
+    }
+
+    private void SetAttribute(@NotNull IndentItem item, @NotNull ResultSet rs) throws SQLException {
+        item.setId(rs.getLong("id"));
+        item.setName(rs.getString("name"));
+        item.setInitialPrice(rs.getFloat("initialPrice"));
+        item.setDiscount(rs.getFloat("discount"));
+        item.setFinalPrice(rs.getFloat("finalPrice"));
+        item.setDescription(rs.getString("description"));
+    }
 }

src/main/java/dao/specification/merchantsDAO.java

@@ -1,6 +1,7 @@
 package dao.specification;
 
 import dao.merchantsAbstractDAO;
+import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import entities.Merchants;
 
@@ -8,6 +9,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.sql.*;
 
+import static dao.specification.abstractDAO.Delete;
 import static util.SQLDatabaseConnection.close;
 import static util.SQLDatabaseConnection.getConnection;
 
@@ -20,16 +22,27 @@ public class merchantsDAO implements merchantsAbstractDAO {
     @Override
     public int insert(@NotNull Merchants merchants) {
         int flag;
+        String insert_sql = "insert into Merchants(name,address,description,phoneNumber) " +
+                "values(?,?,?,?)";
         try {
             connection = getConnection();
-            String insert_sql = "insert into Merchants(name,address,description,phoneNumber) " +
-                    "values(?,?,?,?)";
             preparedStatement = connection.prepareStatement(insert_sql);
 
             preparedStatement.setString(1, merchants.getName());
             preparedStatement.setString(2, merchants.getAddress());
-            preparedStatement.setString(3, merchants.getDescription());
-            preparedStatement.setString(4, merchants.getPhoneNumber());
+
+            //NULL值判断和设定
+            if (merchants.getDescription().equals(" ")) {
+                preparedStatement.setString(3, merchants.getDescription());
+            } else {
+                preparedStatement.setNull(3, Types.NVARCHAR);
+            }
+
+            if (merchants.getPhoneNumber().equals(" ")) {
+                preparedStatement.setString(4, merchants.getPhoneNumber());
+            } else {
+                preparedStatement.setNull(4, Types.VARCHAR);
+            }
 
             flag = preparedStatement.executeUpdate();
         } catch (SQLException e) {
@@ -42,21 +55,23 @@ public class merchantsDAO implements merchantsAbstractDAO {
 
     //删除商家
     @Override
-    public int delete(Merchants merchants) {
-        int flag = 0;
-        try {
-            connection = getConnection();
-            String delete_sql = "delete from Merchants where id = ?";
-            preparedStatement = connection.prepareStatement(delete_sql);
-            preparedStatement.setLong(1, merchants.getId());
-
-            flag = preparedStatement.executeUpdate();
-        } catch (Exception e) {
-            e.printStackTrace();
-        } finally {
-            close(connection, preparedStatement, resultSet);
-        }
-        return flag;
+    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());
     }
 
     //更新信息
@@ -98,11 +113,7 @@ public class merchantsDAO implements merchantsAbstractDAO {
 
             while (resultSet.next()) {
                 merchants = new Merchants();
-                merchants.setId(resultSet.getLong("id"));
-                merchants.setName(resultSet.getString("name"));
-                merchants.setPhoneNumber(resultSet.getString("phoneNumber"));
-                merchants.setAddress(resultSet.getString("address"));
-                merchants.setDescription(resultSet.getString("description"));
+                SetAttribute(merchants, resultSet);
                 list.add(merchants);
             }
 
@@ -128,11 +139,7 @@ public class merchantsDAO implements merchantsAbstractDAO {
 
             while (resultSet.next()) {
                 merchants = new Merchants();
-                merchants.setId(resultSet.getLong("id"));
-                merchants.setName(resultSet.getString("name"));
-                merchants.setAddress(resultSet.getString("address"));
-                merchants.setDescription(resultSet.getString("description"));
-                merchants.setPhoneNumber(resultSet.getString("phoneNumber"));
+                SetAttribute(merchants, resultSet);
             }
         } catch (SQLException e) {
             throw new RuntimeException(e);
@@ -141,4 +148,13 @@ public class merchantsDAO implements merchantsAbstractDAO {
         }
         return merchants;
     }
+
+    //重构，合并方法
+    private void SetAttribute(@NotNull Merchants merchants, @NotNull ResultSet rs) throws SQLException {
+        merchants.setId(rs.getLong("id"));
+        merchants.setName(rs.getString("name"));
+        merchants.setPhoneNumber(rs.getString("phoneNumber"));
+        merchants.setAddress(rs.getString("address"));
+        merchants.setDescription(rs.getString("description"));
+    }
 }

src/main/java/dao/specification/userDAO.java

@@ -11,6 +11,7 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 
+import static dao.specification.abstractDAO.Delete;
 import static util.SQLDatabaseConnection.getConnection;
 import static util.SQLDatabaseConnection.close;
 
@@ -45,22 +46,24 @@ public class userDAO implements userAbstractDAO {
 
     //删除
     @Override
-    public int delete(@NotNull Users users) {
-        int flag;
-        try {
-            connection = getConnection();
-            String delete_sql = "delete from Users where id=?";
-            preparedStatement = connection.prepareStatement(delete_sql);
-            preparedStatement.setLong(1, users.getId());
+    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);
+//        }
 
-            flag = preparedStatement.executeUpdate();
-        } catch (SQLException e) {
-            throw new RuntimeException(e);
-        } finally {
-            close(connection, preparedStatement, resultSet);
-        }
-
-        return flag;
+        return Delete
+                (connection, preparedStatement, resultSet, delete_sql, user.getId());
     }
 
     //更新用户个人信息
@@ -90,7 +93,7 @@ public class userDAO implements userAbstractDAO {
 
     //查询所有用户
     @Override
-    public List<Users> search(Users users) {
+    public List<Users> search(Users user) {
         List<Users> list = new ArrayList<>();
         String selectAll_sql = "select * from Users";
 
@@ -101,13 +104,9 @@ public class userDAO implements userAbstractDAO {
             resultSet = preparedStatement.executeQuery();
 
             while (resultSet.next()) {
-                users = new Users();
-                users.setId(resultSet.getLong("id"));
-                users.setName(resultSet.getString("name"));
-                users.setPhoneNumber(resultSet.getString("phoneNumber"));
-                users.setAddress(resultSet.getString("address"));
-                users.setPassword(resultSet.getString("password"));
-                list.add(users);
+                user = new Users();
+                SetAttribute(user, resultSet);
+                list.add(user);
             }
         } catch (SQLException e) {
             throw new RuntimeException(e);
@@ -130,10 +129,7 @@ public class userDAO implements userAbstractDAO {
 
             while (resultSet.next()) {
                 user = new Users();
-                user.setId(resultSet.getLong("id"));
-                user.setName(resultSet.getString("name"));
-                user.setPhoneNumber(resultSet.getString("phoneNumber"));
-                user.setAddress(resultSet.getString("address"));
+                SetAttribute(user, resultSet);
             }
 
         } catch (SQLException e) {
@@ -143,4 +139,11 @@ public class userDAO implements userAbstractDAO {
         }
         return user;
     }
+
+    private void SetAttribute(@NotNull Users user, @NotNull ResultSet rs) throws SQLException {
+        user.setId(rs.getLong("id"));
+        user.setName(rs.getString("name"));
+        user.setPhoneNumber(rs.getString("phoneNumber"));
+        user.setAddress(rs.getString("address"));
+    }
 }

src/main/java/entities/IndentItem.java

@@ -3,7 +3,7 @@ package entities;
 import lombok.Data;
 //订单中的菜品
 @Data
-public class indentItem {
+public class IndentItem {
     private Long id;//主键，菜品ID
     private String name;//菜品名字
     private Float initialPrice;//菜品原价

src/main/java/entities/Merchants.java

@@ -12,15 +12,6 @@ public class Merchants {
     private String description;//店铺描述
     private String phoneNumber;//商家联系方式
 
-//    @Override
-//    public String toString() {
-//        return "\n商家编号：" + this.id +
-//                "\n店铺名字：" + this.name +
-//                "\n店铺地址：" + this.address +
-//                "\n店铺描述：" + this.description +
-//                "\n联系方式：" + this.phoneNumber;
-//    }
-
     public Merchants(String name, String address,
                      String description, String phoneNumber) {
         this.name = name;

src/main/java/entities/Users.java

@@ -11,14 +11,6 @@ public class Users {
     private String address;//家庭住址
     private String password;//用户密码
 
-//    @Override
-//    public String toString() {
-//        return "\n用户编号：" + this.id +
-//                "\n用户姓名：" + this.name +
-//                "\n家庭地址：" + this.address +
-//                "\n联系方式：" + this.phoneNumber;
-//    }
-
     public Users() {
 
     }

src/main/java/view/IndentItemView.java

@@ -0,0 +1,83 @@
+package view;
+
+import dao.indentItemAbstractDAO;
+import dao.specification.indentDAO;
+import dao.specification.indentItemDAO;
+import entities.IndentItem;
+import util.Toolset;
+
+import java.util.Date;
+import java.util.Scanner;
+
+public class IndentItemView {
+    public void IndentItemDB(int chose) throws IllegalAccessException {
+
+        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
+        }
+    }
+
+    private void CreateIItem() {
+        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|菜单ID");
+        //菜名
+        IItem.setName(reader.nextLine());
+        //初始价格
+        IItem.setInitialPrice(reader.nextFloat());
+        //折扣
+        IItem.setDiscount(reader.nextFloat());
+        //描述
+        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);
+        System.out.println(flag + "行受影响");
+    }
+
+    private void DeleteIItem() {
+        indentItemAbstractDAO DML_delete = new indentItemDAO();
+        Scanner reader = new Scanner(System.in);
+        IndentItem IItem = new IndentItem();
+
+        System.out.println("请输入你要删除的ID");
+        IItem.setId(reader.nextLong());
+
+        int flag = DML_delete.delete(IItem);
+        System.out.println(flag + "行受影响");
+    }
+
+    //TODO 更新订单菜品
+    private void UpdateIItem() {
+        indentItemAbstractDAO DML_update = new indentItemDAO();
+        Scanner reader = new Scanner(System.in);
+        IndentItem IItem = new IndentItem();
+
+    }
+
+    private void SearchIItem(boolean b) throws IllegalAccessException {
+        indentItemAbstractDAO DQL = new indentItemDAO();
+        Scanner reader = new Scanner(System.in);
+        IndentItem IItem = new IndentItem();
+
+        if (b) {
+            for (IndentItem item : DQL.search(IItem)) {
+                System.out.println(Toolset.table(IndentItem.class, item));
+            }
+        } else {
+            System.out.println("请输入你要查询的ID:");
+            IItem = DQL.searchID(reader.nextLong());
+            System.out.println(Toolset.table(IndentItem.class, IItem));
+        }
+    }
+}

src/main/java/view/IndentView.java

@@ -0,0 +1,82 @@
+package view;
+
+import dao.indentAbstractDAO;
+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.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
+        }
+    }
+
+    private void CreateIndent() {
+        indentAbstractDAO DML_insert = new indentDAO();
+        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");
+        //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());
+
+        int flag = DML_insert.insert(indent);
+        System.out.println(flag + "行受影响");
+    }
+
+    private void DeleteIndent() {
+        indentAbstractDAO DML_delete = new indentDAO();
+        Scanner reader = new Scanner(System.in);
+        Indent indent = new Indent();
+
+        System.out.println("请输入你要删除的ID");
+        indent.setId(reader.nextLong());
+
+        int flag = DML_delete.delete(indent);
+        System.out.println(flag + "行受影响");
+    }
+
+    //TODO 更新订单
+    private void UpdateIndent() {
+
+    }
+
+    private void SearchIndent(boolean b) throws IllegalAccessException {
+        Indent indent = new Indent();
+        indentAbstractDAO DQL = new indentDAO();
+        Scanner reader = new Scanner(System.in);
+        if (b) {//b 为 true 查询全部
+            for (Indent item : DQL.search(indent)) {
+                System.out.println(Toolset.table(Indent.class, item));
+            }
+        } else {
+            System.out.println("请输入你要查询的ID:");
+            indent = DQL.searchID(reader.nextLong());
+            System.out.println(Toolset.table(Indent.class, indent));
+        }
+    }
+}

src/main/java/view/MerchantsView.java

@@ -9,53 +9,65 @@ import java.util.Scanner;
 
 public class MerchantsView {
     //商家数据库操作
-    protected static void merchantsDB(int chose) throws IllegalAccessException {
-        int flag;
-        Merchants merchants;
-        Scanner reader = new Scanner(System.in);
+    protected void merchantsDB(int chose) throws IllegalAccessException {
         switch (chose) {
             case 0 -> System.exit(0);
-            case 1 -> {//@TODO 输入格式化 不换行
-                merchantsAbstractDAO DML_insert = new merchantsDAO();
-                System.out.println("请输入：店铺名字|地址|描述|电话");
-                merchants = new Merchants(reader.nextLine(), reader.nextLine(), reader.nextLine(), reader.nextLine());
-                flag = DML_insert.insert(merchants);
-                System.out.println(flag + "行受影响");
-            }
-            case 2 -> {
-                merchantsAbstractDAO DML_delete = new merchantsDAO();
-                merchants = new Merchants();
-
-                System.out.println("请输入你要删除的ID");
-                merchants.setId(reader.nextLong());
-
-                flag = DML_delete.delete(merchants);
-                System.out.println(flag + "行受影响");
-            }
-            case 3 -> {//@FIXME update没有传值
-                merchantsAbstractDAO DML_update = new merchantsDAO();
-                merchants = new Merchants();
-                flag = DML_update.update(merchants);
-                System.out.println(flag + "行受影响");
-            }
-            case 4 -> {
-                merchantsAbstractDAO DQL_all = new merchantsDAO();
-                merchants = new Merchants();
-                //格式化输出
-                for (Merchants item : DQL_all.search(merchants)) {
-                    System.out.println(Toolset.table(Merchants.class, item));
-                }
-
-            }
-            case 5 -> {
-                merchantsAbstractDAO DQL_ID = new merchantsDAO();
-                new Merchants();
-                System.out.println("请输入你要查询的ID:");
-                merchants = DQL_ID.searchID(reader.nextLong());
-                //格式化输出
-                System.out.println(Toolset.table(Merchants.class, merchants));
-            }
+            case 1 -> CreateMerchant();
+            case 2 -> DeleteMerchant();
+            case 3 -> UpdateMerchant();
+            case 4 -> SearchMerchant(true);//查询所有
+            case 5 -> SearchMerchant(false);//查询ID
         }
     }
 
+    private void CreateMerchant() {//@TODO 输入格式化 不换行
+        Scanner reader = new Scanner(System.in);
+        merchantsAbstractDAO DML_insert = new merchantsDAO();
+
+        System.out.println("请输入：店铺名字|地址|描述|电话");
+        Merchants merchants = new Merchants
+                (reader.nextLine(), reader.nextLine(), reader.nextLine(), reader.nextLine());
+
+        int flag = DML_insert.insert(merchants);
+        System.out.println(flag + "行受影响");
+    }
+
+    private void DeleteMerchant() {
+        Merchants merchants = new Merchants();
+        Scanner reader = new Scanner(System.in);
+        merchantsAbstractDAO DML_delete = new merchantsDAO();
+
+        System.out.println("请输入你要删除的ID");
+        merchants.setId(reader.nextLong());
+
+        int flag = DML_delete.delete(merchants);
+        System.out.println(flag + "行受影响");
+    }
+
+    private void UpdateMerchant() {//@FIXME update没有传值
+        Merchants merchants = new Merchants();
+        Scanner reader = new Scanner(System.in);
+
+        merchantsAbstractDAO DML_update = new merchantsDAO();
+        int flag = DML_update.update(merchants);
+        System.out.println(flag + "行受影响");
+
+    }
+
+    private void SearchMerchant(boolean b) throws IllegalAccessException {
+        Merchants merchants = new Merchants();
+        Scanner reader = new Scanner(System.in);
+        merchantsAbstractDAO DQL = new merchantsDAO();
+        if (b) { // b 为 ture 查询所有商家
+            //格式化输出
+            for (Merchants item : DQL.search(merchants)) {
+                System.out.println(Toolset.table(Merchants.class, item));
+            }
+        } else {
+            System.out.println("请输入你要查询的ID:");
+            merchants = DQL.searchID(reader.nextLong());
+            //格式化输出
+            System.out.println(Toolset.table(Merchants.class, merchants));
+        }
+    }
 }

src/main/java/view/UserView.java

@@ -9,53 +9,68 @@ import java.util.Scanner;
 
 public class UserView {
     //用户数据库操作
-    protected static void userDB(int chose) throws IllegalAccessException {
-        int flag;
-        Users user;
-        Scanner reader = new Scanner(System.in);
+    protected void userDB(int chose) throws IllegalAccessException {
+
 
         switch (chose) {
             case 0 -> System.exit(0);
-            case 1 -> {//@TODO 非换行输入
-                userAbstractDAO DML_insert = new userDAO();
-                System.out.println("请输入：名字|电话|地址|密码");
-                user = new Users(reader.nextLine(), reader.nextLine(), reader.nextLine(), reader.nextLine());
-                flag = DML_insert.insert(user);
-                System.out.println(flag + "行受影响");
-            }
-            case 2 -> {
-                userAbstractDAO DML_delete = new userDAO();
-                user = new Users();
+            case 1 -> CreateUser();
+            case 2 -> DeleteUser();
+            case 3 -> UpdateUser();
+            case 4 -> SearchUser(true);//查询全部
+            case 5 -> SearchUser(false);//查询ID
+        }
+    }
 
-                System.out.println("请输入你要删除的ID:");
-                user.setId(reader.nextLong());
-                flag = DML_delete.delete(user);
+    private void CreateUser() {//@TODO 非换行输入
+        Scanner reader = new Scanner(System.in);
+        userAbstractDAO DML_insert = new userDAO();
 
-                System.out.println(flag + "行受影响");
-            }
-            case 3 -> {//@FIXME update没有传值
-                userAbstractDAO DML_update = new userDAO();
-                user = new Users();
-                flag = DML_update.update(user);
-                System.out.println(flag + "行受影响");
-            }
-            case 4 -> {
-                userAbstractDAO DQL_all = new userDAO();
-                user = new Users();
-                //格式化输出
-                for (Users item : DQL_all.search(user)) {
-                    System.out.println(Toolset.table(Users.class, item));
-                }
+        System.out.println("请输入：名字|电话|地址|密码");
+        Users user = new Users
+                (reader.nextLine(), reader.nextLine(), reader.nextLine(), reader.nextLine());
 
+        int flag = DML_insert.insert(user);
+        System.out.println(flag + "行受影响");
+    }
+
+    private void DeleteUser() {
+        Users user = new Users();
+        Scanner reader = new Scanner(System.in);
+
+        userAbstractDAO DML_delete = new userDAO();
+
+        System.out.println("请输入你要删除的ID:");
+        user.setId(reader.nextLong());
+        int flag = DML_delete.delete(user);
+
+        System.out.println(flag + "行受影响");
+    }
+
+    private void UpdateUser() {//@FIXME update没有传值
+        Users user = new Users();
+        ;
+        Scanner reader = new Scanner(System.in);
+
+        userAbstractDAO DML_update = new userDAO();
+        int flag = DML_update.update(user);
+        System.out.println(flag + "行受影响");
+    }
+
+    private void SearchUser(boolean b) throws IllegalAccessException {
+        Users user = new Users();
+        Scanner reader = new Scanner(System.in);
+        userAbstractDAO DQL = new userDAO();
+        if (b) {
+            //格式化输出
+            for (Users item : DQL.search(user)) {
+                System.out.println(Toolset.table(Users.class, item));
             }
-            case 5 -> {
-                userAbstractDAO DQL_ID = new userDAO();
-                new Users();
-                System.out.println("请输入你要查询的ID:");
-                user = DQL_ID.searchID(reader.nextLong());
-                //格式化输出
-                System.out.println(Toolset.table(Users.class, user));
-            }
+        } else {
+            System.out.println("请输入你要查询的ID:");
+            user = DQL.searchID(reader.nextLong());
+            //格式化输出
+            System.out.println(Toolset.table(Users.class, user));
         }
     }
 }

src/main/java/view/shellUI.java

@@ -2,9 +2,6 @@ package view;
 
 import util.Toolset;
 
-import static view.MerchantsView.merchantsDB;
-import static view.UserView.userDB;
-
 public class shellUI {
     public static void run() throws IllegalAccessException {
 
@@ -13,6 +10,7 @@ public class shellUI {
                 -----------------后台管理系统---------------
                 ------------------------------------------
                 """);
+
         Chose();
     }
 
@@ -20,7 +18,7 @@ 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\t0.退出
+                1.商家管理\t2.用户管理\t3.订单管理\t0.退出
                 """);
 
         switch (Toolset.option()) {
@@ -32,7 +30,8 @@ public class shellUI {
                         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
                         """);
-                merchantsDB(Toolset.option());
+                MerchantsView merchants_view = new MerchantsView();
+                merchants_view.merchantsDB(Toolset.option());
                 Chose();
             }
             //用户
@@ -42,10 +41,28 @@ public class shellUI {
                         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
                         """);
-                userDB(Toolset.option());
+                UserView user_view = new UserView();
+                user_view.userDB(Toolset.option());
                 Chose();
             }
+            //订单
+            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
+                        """);
+                IndentView indent_view = new IndentView();
+                indent_view.IndentDB(Toolset.option());
+                Chose();
+            }
+            //订单菜品
+            case 4 -> {
+
+            }
         }
+
+
     }
 
 }