completed the task

src/main/java/mate/academy/Main.java

@@ -1,7 +1,30 @@
 package mate.academy;
 
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import mate.academy.dao.BookDao;
+import mate.academy.lib.Injector;
+import mate.academy.model.Book;
+
 public class Main {
+    private static final Injector injector = Injector.getInstance("mate.academy");
+
     public static void main(String[] args) {
+        BookDao bookDao = (BookDao) injector.getInstance(BookDao.class);
+        List<Book> books = new ArrayList<>();
+        books.add(new Book("Harry Potter", new BigDecimal(1200)));
+        books.add(new Book("Star Wars", new BigDecimal(1100)));
+        books.add(new Book("Dune", new BigDecimal(1700)));
+
+        books.forEach(bookDao::create);
+        Book book = bookDao.findById(1L).orElseThrow(() ->
+                new RuntimeException("Couldn't find the book")
+        );
+        List<Book> bookList = bookDao.findAll();
+        System.out.println(bookList);
+        Book updatedBook = bookDao.update(new Book("Harry Potter", new BigDecimal(2500)));
 
+        System.out.println(bookDao.deleteById(1L));
     }
 }

src/main/java/mate/academy/dao/BookDao.java

@@ -0,0 +1,17 @@
+package mate.academy.dao;
+
+import java.util.List;
+import java.util.Optional;
+import mate.academy.model.Book;
+
+public interface BookDao {
+    Book create(Book book);
+
+    Optional<Book> findById(Long id);
+
+    List<Book> findAll();
+
+    Book update(Book book);
+
+    boolean deleteById(Long id);
+}

src/main/java/mate/academy/dao/BookDaoImpl.java

@@ -0,0 +1,128 @@
+package mate.academy.dao;
+
+import java.math.BigDecimal;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import mate.academy.exception.DataProcessingException;
+import mate.academy.lib.Dao;
+import mate.academy.model.Book;
+
+@Dao
+public class BookDaoImpl implements BookDao {
+    @Override
+    public Book create(Book book) {
+        String sql = "INSERT INTO books (title, price) VALUES (?, ?)";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement =
+                             connection.prepareStatement(sql,
+                             PreparedStatement.RETURN_GENERATED_KEYS)) {
+            preparedStatement.setString(1, book.getTitle());
+            preparedStatement.setBigDecimal(2, book.getPrice());
+
+            int affectedRows = preparedStatement.executeUpdate();
+            if (affectedRows < 1) {
+                throw new RuntimeException("Expected to insert at least 1 row."
+                        + " But was inserted 0");
+            }
+
+            ResultSet generatedKeys = preparedStatement.getGeneratedKeys();
+            if (generatedKeys.next()) {
+                Long id = generatedKeys.getObject(1, Long.class);
+                book.setId(id);
+            }
+
+        } catch (SQLException e) {
+            throw new RuntimeException("Cannot create a new book: " + book, e);
+        }
+        return book;
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        Book book = new Book();
+        String sql = "SELECT id, title, price FROM books WHERE id = ?";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
+            preparedStatement.setLong(1, id);
+
+            ResultSet resultSet = preparedStatement.executeQuery();
+            if (resultSet.next()) {
+                book.setId(resultSet.getLong("id"));
+                book.setTitle(resultSet.getString("title"));
+                book.setPrice(resultSet.getBigDecimal("price"));
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("The book with the id: " + id
+                    + " wasn't found", e);
+        }
+        return Optional.ofNullable(book);
+    }
+
+    @Override
+    public List<Book> findAll() {
+        List<Book> books = new ArrayList<>();
+        String sql = "SELECT * FROM book";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
+            ResultSet resultSet = preparedStatement.executeQuery();
+            while (resultSet.next()) {
+                Book book = getBookFromResultSet(resultSet);
+                books.add(book);
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Cannot find any books", e);
+        }
+        return books;
+    }
+
+    @Override
+    public Book update(Book book) {
+        String sql = "UPDATE books SET title = ?, price = ? WHERE id = ?";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
+            preparedStatement.setString(1, book.getTitle());
+            preparedStatement.setBigDecimal(2, book.getPrice());
+            preparedStatement.setLong(3, book.getId());
+            int affectedRows = preparedStatement.executeUpdate();
+            if (affectedRows < 1) {
+                throw new RuntimeException("Failed to update the book with id: "
+                        + book.getId());
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Cannot update the book", e);
+        }
+        return book;
+    }
+
+    @Override
+    public boolean deleteById(Long id) {
+        String sql = "DELETE FROM books WHERE id = ?";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
+            preparedStatement.setLong(1, id);
+            int affectedRows = preparedStatement.executeUpdate();
+            return affectedRows > 0;
+        } catch (SQLException e) {
+            throw new RuntimeException("Failed to delete the book with id: "
+                    + id, e);
+        }
+
+    }
+
+    private Book getBookFromResultSet(ResultSet resultSet) throws SQLException {
+        Long id = resultSet.getObject("id", Long.class);
+        String title = resultSet.getString("title");
+        BigDecimal price = resultSet.getBigDecimal("price");
+
+        Book book = new Book();
+        book.setId(id);
+        book.setTitle(title);
+        book.setPrice(price);
+        return book;
+    }
+}

src/main/java/mate/academy/dao/ConnectionUtil.java

@@ -0,0 +1,32 @@
+package mate.academy.dao;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+import mate.academy.exception.DataProcessingException;
+
+public class ConnectionUtil {
+    private static final String DB_URL = "jdbc:mysql://localhost:3306/jv_jdbc_intro";
+    private static final Properties DB_PROPERTIES;
+
+    static {
+        DB_PROPERTIES = new Properties();
+        DB_PROPERTIES.put("user","root");
+        DB_PROPERTIES.put("password","3McuPdh25LoKc1_");
+
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+        } catch (ClassNotFoundException e) {
+            throw new DataProcessingException("Failed to connect to the Database."
+                    + "Check the connection setting. Make sure that your URL is correct"
+                    + DB_URL
+            + "Verify user id and credentials", e);
+
+        }
+    }
+
+    public static Connection getConnection() throws SQLException {
+        return DriverManager.getConnection(DB_URL,DB_PROPERTIES);
+    }
+}

src/main/java/mate/academy/exception/DataProcessingException.java

@@ -0,0 +1,7 @@
+package mate.academy.exception;
+
+public class DataProcessingException extends RuntimeException {
+    public DataProcessingException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/mate/academy/lib/Dao.java

@@ -5,4 +5,5 @@
 
 @Retention(RetentionPolicy.RUNTIME)
 public @interface Dao {
+
 }

src/main/java/mate/academy/model/Book.java

@@ -0,0 +1,76 @@
+package mate.academy.model;
+
+import java.math.BigDecimal;
+import java.util.Objects;
+
+public class Book {
+    private Long id;
+    private String title;
+    private BigDecimal price;
+
+    public Book() {
+    }
+
+    public Book(String title, BigDecimal price) {
+        this.title = title;
+        this.price = price;
+    }
+
+    public Book(Long id, String title, BigDecimal price) {
+        this.id = id;
+        this.title = title;
+        this.price = price;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{"
+                + "id=" + id
+                + ", title='" + title + '\''
+                + ", price=" + price
+                + '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        Book book = (Book) o;
+        return Objects.equals(id, book.id)
+                && Objects.equals(title, book.title)
+                && Objects.equals(price, book.price);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, title, price);
+    }
+}

src/main/resources/init_db.sql

@@ -0,0 +1,5 @@
+CREATE TABLE 'book' (
+    'id' BIGINT AUTO_INCREMENT PRIMARY KEY,
+    'title' VARCHAR(255) NOT NULL,
+    'price' DECIMAL(10, 2) NOT NULL
+);