implemented task

pom.xml

@@ -14,4 +14,12 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
+    <dependencies>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>8.1.0</version>
+        </dependency>
+    </dependencies>
+
 </project>

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

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

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

@@ -1,7 +1,25 @@
 package mate.academy;
 
+import mate.academy.dao.BookDao;
+import mate.academy.lib.Injector;
+import mate.academy.model.Book;
+import java.math.BigDecimal;
+import java.util.Optional;
+
 public class Main {
-    public static void main(String[] args) {
+    private static final Injector injector = Injector.getInstance("mate.academy.dao");
 
+    public static void main(String[] args) {
+        BookDao bookDao = (BookDao) injector.getInstance(BookDao.class);
+        Book book = new Book();
+        book.setTitle("Sample");
+        book.setPrice(BigDecimal.valueOf(5.99));
+        bookDao.create(book);
+        Long bookId = 1L;
+        Optional<Book> foundBook = bookDao.findById(bookId);
+        bookDao.findAll();
+        Book updatedBook = foundBook.orElseThrow();
+        bookDao.update(updatedBook);
+        bookDao.deleteById(bookId);
     }
 }

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

@@ -0,0 +1,13 @@
+package mate.academy.dao;
+
+import mate.academy.model.Book;
+import java.util.List;
+import java.util.Optional;
+
+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 +1,126 @@
+package mate.academy.dao;
+
+import mate.academy.DataProcessingException;
+import mate.academy.model.Book;
+import mate.academy.lib.Dao;
+import java.math.BigDecimal;
+import java.sql.Connection;
+import java.sql.DriverManager;
+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 java.util.Properties;
+
+@Dao
+public class BookDaoImpl implements BookDao {
+    private static final String CREATE_QUERY = "INSERT INTO books (title, price) VALUES (?, ?)";
+    private static final String FIND_BY_ID_QUERY = "SELECT * FROM books WHERE id = ?";
+    private static final String FIND_ALL_QUERY = "SELECT * FROM books";
+    private static final String UPDATE_QUERY = "UPDATE books SET title = ?, price = ? WHERE id = ?";
+    private static final String DELETE_BY_ID_QUERY = "DELETE FROM books WHERE id = ?";
+
+    @Override
+    public Book create(Book book) {
+        try (Connection connection = getConnection();
+             PreparedStatement statement = connection.prepareStatement(CREATE_QUERY,
+                     PreparedStatement.RETURN_GENERATED_KEYS)) {
+            setBookParameters(statement, book);
+            statement.executeUpdate();
+            try (ResultSet generatedKeys = statement.getGeneratedKeys()) {
+                if (generatedKeys.next()) {
+                    book.setId(generatedKeys.getLong(1));
+                } else {
+                    throw new SQLException("Creating book " + book + " failed, no ID obtained.");
+                }
+            }
+            return book;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Failed to create book " + book, e);
+        }
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        try (Connection connection = getConnection();
+             PreparedStatement statement = connection.prepareStatement(FIND_BY_ID_QUERY)) {
+
+            statement.setLong(1, id);
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
+                    return Optional.of(parseBook(resultSet));
+                }
+            }
+            return Optional.empty();
+        } catch (SQLException e) {
+            throw new DataProcessingException("Failed to find book by ID " + id, e);
+        }
+    }
+
+    @Override
+    public List<Book> findAll() {
+        try (Connection connection = getConnection();
+             PreparedStatement statement = connection.prepareStatement(FIND_ALL_QUERY);
+             ResultSet resultSet = statement.executeQuery()) {
+
+            List<Book> books = new ArrayList<>();
+            while (resultSet.next()) {
+                books.add(parseBook(resultSet));
+            }
+            return books;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Failed to get all books", e);
+        }
+    }
+
+    @Override
+    public Book update(Book book) {
+        try (Connection connection = getConnection();
+             PreparedStatement statement = connection.prepareStatement(UPDATE_QUERY)) {
+            setBookParameters(statement, book);
+            statement.setLong(3, book.getId());
+            statement.executeUpdate();
+            return book;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Failed to update book" + book, e);
+        }
+    }
+
+    @Override
+    public boolean deleteById(Long id) {
+        try (Connection connection = getConnection();
+             PreparedStatement statement = connection.prepareStatement(DELETE_BY_ID_QUERY)) {
+
+            statement.setLong(1, id);
+            int rowsDeleted = statement.executeUpdate();
+            return rowsDeleted > 0;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Failed to delete book by ID " + id, e);
+        }
+    }
+
+    private Connection getConnection() throws SQLException {
+        Properties dbProperties = new Properties();
+        dbProperties.put("user", "root");
+        dbProperties.put("password", "Vika07012000");
+        return DriverManager.getConnection("jdbc:mysql://localhost:3306/books", dbProperties);
+    }
+
+    private Book parseBook(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;
+    }
+
+    private void setBookParameters(PreparedStatement statement, Book book) throws SQLException {
+        statement.setString(1, book.getTitle());
+        statement.setBigDecimal(2, book.getPrice());
+    }
+}

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

@@ -0,0 +1,36 @@
+package mate.academy.model;
+
+import java.math.BigDecimal;
+
+public class Book {
+    private Long id;
+    private String title;
+    private BigDecimal price;
+
+    public Book() {
+    }
+
+    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;
+    }
+}

src/main/resources/init_db.sql

@@ -0,0 +1,6 @@
+CREATE TABLE `books` (
+  `id` BIGINT NOT NULL AUTO_INCREMENT,
+  `title` VARCHAR(255) NOT NULL,
+  `price` DECIMAL(10, 2) NOT NULL,
+  PRIMARY KEY (id)
+);