Bug Fixed。完成ShellUI、UserDAO、merchantsDAO，测试通过

README.md

@@ -3,9 +3,11 @@
 
 # 2023-03-16
 - 初始化项目
+
 # 2023-03-22
 - 增加实体类
 - 删除.idea文件
+
 # 2023-03-26
 - 完善实体类
 - 我靠，折腾了一晚上，提交了十几次，终于提交时把.idea这个文件给忽略了
@@ -19,20 +21,36 @@
   - `update`一下远端项目
   - `push`代码
 - 我好菜。。。
+
 # 2023-03-27
 - 完善了一下实体类，发现商家那一部分漏了一点东西，给它补上了
 - 另外就是为什么`.idea`文件我已经取消提交了，为啥本地的`commit`里面还会有有啊……无语了
 - 是不是跟`git`八字不合。。。
+
 # 2023-03-29
 - 添加`JDBC`驱动，连接数据库
+
 # 2023-05-04
-- 创建数据库表，并成功连接
+- 创建数据库表，测试连接成功
-- 调整实体类与数据库对应的结构，修改外键
 - 调整项目结构
+  - 调整实体类与数据库对应的结构
+  - 修改外键
 - 完成DAO层抽象接口
-- 完成MerchantsDAO和UserDAO具体功能
+  - 完成MerchantsDAO和UserDAO具体功能
-# 2023-05-05
+
-- Debug MerchantsDAO 按ID查询功能
+# 2023-05-05-NO.1
+- Bug fixed: MerchantsDAO 按ID查询功能
 - 搭建shellUI的大体框架
 - 完成UserDAO具体功能
-- 第一次测试
+
+# 2023-05-05-NO.2
+- 实现UserDAO和MerchantsDAO所有接口功能
+- shellUI完成
+- 测试
+  - UserDAO和MerchantsDAO的增加、查询、删除功能测试通过
+  - shellUI功能测试通过
+- Bug Fixed
+  - DAO层Merchants、User类查询问题
+    - 按ID查询报错
+    - 全部查询只显示最后添加的行
+  - 输出格式混乱问题

src/main/java/dao/abstractDAO.java

@@ -10,4 +10,6 @@ public interface abstractDAO<T> {
     int update(T t);//改
 
     List<T> search(T t);//查
+
+    T searchID(Long id);//查 ByID
 }

src/main/java/dao/merchantsAbstractDAO.java

@@ -3,6 +3,5 @@ package dao;
 import entities.Merchants;
 
 public interface merchantsAbstractDAO extends abstractDAO<Merchants> {
-    //根据id查询商家
+
-    Merchants searchMerchantByID(Long id);
 }

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

@@ -0,0 +1,8 @@
+package dao.specification;
+
+import java.util.List;
+
+//@TODO 重构代码 合并userDAO和merchantsDAO中重复方法
+public class abstractDAO {
+
+}

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

@@ -16,46 +16,22 @@ public class merchantsDAO implements merchantsAbstractDAO {
     private PreparedStatement preparedStatement = null;
     private ResultSet resultSet = null;
 
-    //通过id寻找商家
-    @Override
-    public Merchants searchMerchantByID(Long id) {
-        Merchants merchants = null;
-        String selectID_sql = "select * from Merchants where id = ?";
-        try {
-            connection = getConnection();
-            preparedStatement = connection.prepareStatement(selectID_sql);
-            preparedStatement.setLong(1, id);
-            resultSet = preparedStatement.executeQuery();
-
-            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"));
-            }
-        } catch (SQLException e) {
-            throw new RuntimeException(e);
-        } finally {
-            close(connection, preparedStatement, resultSet);
-        }
-        return merchants;
-    }
-
     //新加商家
     @Override
     public int insert(@NotNull Merchants merchants) {
-        int flag = 0;
+        int flag;
         try {
             connection = getConnection();
-            String insert_sql = "insert into Merchants(name,address,description,phoneNumber) values(?,?,?,?)";
+            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());
+
+            flag = preparedStatement.executeUpdate();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         } finally {
@@ -73,6 +49,7 @@ public class merchantsDAO implements merchantsAbstractDAO {
             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();
@@ -110,13 +87,16 @@ public class merchantsDAO implements merchantsAbstractDAO {
     @Override
     public List<Merchants> search(Merchants merchants) {
         List<Merchants> list = new ArrayList<>();
+        String selectAll_sql = "select * from Merchants";
+
         try {
             connection = getConnection();
-            String selectAll_sql = "select * from Merchants";
+
             preparedStatement = connection.prepareStatement(selectAll_sql);
             resultSet = preparedStatement.executeQuery();
 
             while (resultSet.next()) {
+                merchants = new Merchants();
                 merchants.setId(resultSet.getLong("id"));
                 merchants.setName(resultSet.getString("name"));
                 merchants.setPhoneNumber(resultSet.getString("phoneNumber"));
@@ -133,4 +113,31 @@ public class merchantsDAO implements merchantsAbstractDAO {
         return list;
     }
 
+
+    //通过id寻找商家
+    @Override
+    public Merchants searchID(Long id) {
+        Merchants merchants = null;
+        String selectID_sql = "select * from Merchants where id = ?";
+        try {
+            connection = getConnection();
+            preparedStatement = connection.prepareStatement(selectID_sql);
+            preparedStatement.setLong(1, id);
+            resultSet = preparedStatement.executeQuery();
+
+            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"));
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            close(connection, preparedStatement, resultSet);
+        }
+        return merchants;
+    }
 }

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

@@ -19,13 +19,31 @@ public class userDAO implements userAbstractDAO {
     private PreparedStatement preparedStatement = null;
     private ResultSet resultSet = null;
 
-    //@TODO UserDAO 插入功能
+    //新建用户
     @Override
-    public int insert(Users users) {
+    public int insert(@NotNull Users users) {
+        int flag;
+        try {
+            connection = getConnection();
+            String insert_sql = "insert into Users(name, phoneNumber, address, password) " +
+                    "values (?,?,?,?)";
+            preparedStatement = connection.prepareStatement(insert_sql);
 
-        return 0;
+            preparedStatement.setString(1, users.getName());
+            preparedStatement.setString(2, users.getPhoneNumber());
+            preparedStatement.setString(3, users.getAddress());
+            preparedStatement.setString(4, users.getPassword());
+
+            flag = preparedStatement.executeUpdate();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            close(connection, preparedStatement, resultSet);
+        }
+        return flag;
     }
 
+    //删除
     @Override
     public int delete(@NotNull Users users) {
         int flag;
@@ -34,8 +52,8 @@ public class userDAO implements userAbstractDAO {
             String delete_sql = "delete from Users where id=?";
             preparedStatement = connection.prepareStatement(delete_sql);
             preparedStatement.setLong(1, users.getId());
-            flag = preparedStatement.executeUpdate();
 
+            flag = preparedStatement.executeUpdate();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         } finally {
@@ -45,20 +63,24 @@ public class userDAO implements userAbstractDAO {
         return flag;
     }
 
+    //更新用户个人信息
     @Override
     public int update(@NotNull Users users) {
-        int flag = 0;
+        int flag;
-        try {
-            connection = getConnection();
         String update_sql = "update Users " +
                 "set name = ?, phoneNumber = ?, address = ? " +
                 "where id = ?";
-            preparedStatement = connection.prepareStatement(update_sql);
-            preparedStatement.setString(1,users.getName());
-            preparedStatement.setString(2,users.getPhoneNumber());
-            preparedStatement.setString(3,users.getAddress());
-            preparedStatement.setLong(4,users.getId());
 
+        try {
+            connection = getConnection();
+            preparedStatement = connection.prepareStatement(update_sql);
+
+            preparedStatement.setString(1, users.getName());
+            preparedStatement.setString(2, users.getPhoneNumber());
+            preparedStatement.setString(3, users.getAddress());
+            preparedStatement.setLong(4, users.getId());
+
+            flag = preparedStatement.executeUpdate();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
@@ -69,14 +91,17 @@ public class userDAO implements userAbstractDAO {
     @Override
     public List<Users> search(Users users) {
         List<Users> list = new ArrayList<>();
+        String selectAll_sql = "select * from Users";
 
         try {
             connection = getConnection();
-            String selectAll_sql = "select * from Users";
+
             preparedStatement = connection.prepareStatement(selectAll_sql);
-            preparedStatement.executeQuery();
+            resultSet = preparedStatement.executeQuery();
 
             while (resultSet.next()) {
+                users = new Users();
+                users.setName(resultSet.getString("id"));
                 users.setName(resultSet.getString("name"));
                 users.setPhoneNumber(resultSet.getString("phoneNumber"));
                 users.setAddress(resultSet.getString("address"));
@@ -92,7 +117,7 @@ public class userDAO implements userAbstractDAO {
 
     //用ID查询用户
     @Override
-    public Users searchUsersByID(Long id) {
+    public Users searchID(Long id) {
         Users user = null;
         String selectID_sql = "select * from Users where id = ?";
         try {

src/main/java/dao/userAbstractDAO.java

@@ -3,6 +3,5 @@ package dao;
 import entities.Users;
 
 public interface userAbstractDAO extends abstractDAO<Users> {
-    //根据ID查询用户
+
-    Users searchUsersByID(Long id);
 }

src/main/java/entities/Merchants.java

@@ -12,12 +12,25 @@ public class Merchants {
     private String description;//店铺描述
     private String phoneNumber;//商家联系方式
 
-    @Override
+//    @Override
-    public String toString() {
+//    public String toString() {
-        return "\n商家编号：" + this.id +
+//        return "\n商家编号：" + this.id +
-                "\n店铺名字：" + this.name +
+//                "\n店铺名字：" + this.name +
-                "\n店铺地址：" + this.address +
+//                "\n店铺地址：" + this.address +
-                "\n店铺描述：" + this.description +
+//                "\n店铺描述：" + this.description +
-                "\n联系方式：" + this.phoneNumber;
+//                "\n联系方式：" + this.phoneNumber;
+//    }
+
+    public Merchants(String name, String address,
+                     String description, String phoneNumber) {
+        this.name = name;
+        this.address = address;
+        this.description = description;
+        this.phoneNumber = phoneNumber;
     }
+
+    public Merchants() {
+
+    }
+
 }

src/main/java/entities/Users.java

@@ -6,17 +6,28 @@ import lombok.Data;
 @Data
 public class Users {
     private Long id;//主键，用户ID
-    private String password;//用户密码
     private String name;//用户姓名
     private String phoneNumber;//用户联系方式
     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() {
 
-    @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(String name, String phoneNumber,
+                 String address, String password) {
+        this.name = name;
+        this.phoneNumber = phoneNumber;
+        this.address = address;
+        this.password = password;
+    }
 }

src/main/java/example/shellUI.java

@@ -1,55 +1,157 @@
 package example;
 
-import com.microsoft.sqlserver.jdbc.StringUtils;
+import dao.merchantsAbstractDAO;
-import dao.*;
+import dao.specification.merchantsDAO;
-import dao.specification.*;
+import dao.specification.userDAO;
+import dao.userAbstractDAO;
+import entities.Merchants;
+import entities.Users;
+import util.Toolset;
 
 import java.util.Scanner;
 
 public class shellUI {
-    public static void main(String[] args) {
+    public static void main(String[] args) throws IllegalAccessException {
         run();
     }
 
-    public static void run() {
+    public static void run() throws IllegalAccessException {
-        Scanner reader = new Scanner(System.in);
+
         System.out.println("""
                 ------------------------------------------
                 ----------------后台管理系统----------------
                 ------------------------------------------
                 """);
-        System.out.println("""
+        Chose();
-                请选择你要进行的功能
-                1.商家管理
-                2.用户管理
-                """);
-        //
-        int chose1;
-        while (true) {
-            if (reader.hasNextInt()) {
-                chose1 = reader.nextInt();
-                break;
-            } else {
-                System.out.println("你的输入有误，请重新输入！");
     }
-        }
+
-        //@TODO 2023-05-05 shellUI功能选择
+    //选项一
-        int chose2;
+    private static void Chose() throws IllegalAccessException {
-        switch (chose1) {
-            case 1:
         System.out.println("""
-                        请选择你想使用的功能：
+                请选择你要进行的功能:
-                        1.
+                1.商家管理\t2.用户管理\t0.退出
-                        2.
-                        3.
-                        4.
-                        5.
                 """);
 
-                break;
+        switch (Toolset.option()) {
-            case 2:
+            case 0 -> System.exit(0);
+            //商家
+            case 1 -> {
+                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
+                        """);
+                merchantsDB(Toolset.option());
+                Chose();
+            }
+            //用户
+            case 2 -> {
+                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
+                        """);
+                userDB(Toolset.option());
+                Chose();
+            }
+        }
     }
 
+    //商家数据库操作
+    private static void merchantsDB(int chose) throws IllegalAccessException {
+        int flag;
+        Merchants merchants;
+        Scanner reader = new Scanner(System.in);
+        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("请输入你要删除商家的ID");
+                merchants.setId(reader.nextLong());
+
+                flag = DML_delete.delete(merchants);
+                System.out.println(flag + "行受影响");
+            }
+            case 3 -> {
+                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));
+            }
+        }
+    }
+
+    //用户数据库操作
+    private static void userDB(int chose) throws IllegalAccessException {
+        int flag;
+        Users user;
+        Scanner reader = new Scanner(System.in);
+
+        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();
+                flag = DML_delete.delete(user);
+                System.out.println(flag + "行受影响");
+            }
+            case 3 -> {
+                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));
+                }
+
+            }
+            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));
+            }
+        }
+    }
+
 }

src/main/java/util/SQLDatabaseConnection.java

@@ -7,10 +7,10 @@ public class SQLDatabaseConnection {
     private static final String connectionUrl =
             "jdbc:sqlserver://152.136.182.168:1433;"
                     + "database=Elm;"
-                    + "user=guest@152.136.182.168;"
+                    + "user=guest;"
                     + "password=20230504#Guest;"
                     + "encrypt=true;"
-                    + "trustServerCertificate=false;"
+                    + "trustServerCertificate=true;"
                     + "loginTimeout=30;";
 
     public static Connection getConnection() {

src/main/java/util/Toolset.java

@@ -0,0 +1,98 @@
+package util;
+
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.Scanner;
+import java.util.StringJoiner;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class Toolset {
+    public static int option() {
+        Scanner reader = new Scanner(System.in);
+        int chose;
+        //读取选项
+        while (true) {
+            if (reader.hasNextInt()) {
+                chose = reader.nextInt();
+                break;
+            } else {
+                System.out.println("你的输入有误，请重新输入~");
+            }
+        }
+        return chose;
+    }
+
+    //shellUI格式化输出
+    private static final Map<Class<?>, Field[]> CLASS_2_FIELD_NAME = new ConcurrentHashMap<>();
+
+    /**
+     * 将对象打印成表格
+     */
+    @SafeVarargs
+    public static <T> String table(Class<T> clazz, T... objs) throws IllegalAccessException {
+        Field[] fields = safeGetRefCtx(clazz);
+        if (fields.length == 0) {
+            return "";
+        }
+        // 计算每一列
+        int[] maxLens = new int[fields.length];
+        for (int i = 0; i < fields.length; i++) {
+            final int ti = i;
+            // 取出当前字段中最长的长度
+            maxLens[i] = Arrays.stream(objs)
+                    .map(item -> {
+                        try {
+                            return String.valueOf(fields[ti].get(item));
+                        } catch (IllegalAccessException e) {
+                            // pass
+                        }
+                        return "";
+                    })
+                    .mapToInt(String::length)
+                    .max()
+                    .orElse(0);
+        }
+        StringJoiner result = new StringJoiner("\n");
+        for (T obj : objs) {
+            // 竖线前后加一个空格分割
+            StringJoiner sj = new StringJoiner(" | ");
+            for (int i = 0; i < fields.length; i++) {
+                sj.add(fields[i].getName() + ": " + padRight(String.valueOf(fields[i].get(obj)), maxLens[i]));
+            }
+            result.merge(sj);
+        }
+        return result.toString();
+    }
+
+    /**
+     * 右侧补充字符
+     */
+    @Contract(pure = true)
+    private static @NotNull String padRight(@NotNull String origin, int length) {
+        StringBuilder originBuilder = new StringBuilder(origin);
+        while (originBuilder.length() < length) {
+            originBuilder.append(' ');
+        }
+        origin = originBuilder.toString();
+        return origin;
+    }
+
+    private static Field @NotNull [] safeGetRefCtx(Class<?> clazz) {
+        Field[] fields = CLASS_2_FIELD_NAME.get(clazz);
+        if (fields == null) {
+            fields = clazz.getDeclaredFields();
+            for (Field field : fields) {
+                //打开私有访问
+                field.setAccessible(true);
+            }
+            CLASS_2_FIELD_NAME.put(clazz, fields);
+        }
+        return fields;
+    }
+
+
+}