Added task solution

pom.xml

@@ -17,6 +17,13 @@
             https://raw.githubusercontent.com/mate-academy/style-guides/master/java/checkstyle.xml
         </maven.checkstyle.plugin.configLocation>
     </properties>
+    <dependencies>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.33</version>
+        </dependency>
+    </dependencies>
 
     <build>
         <plugins>

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

@@ -1,7 +1,25 @@
 package mate.academy;
 
+import java.math.BigDecimal;
+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);
+        Book book = new Book(1L, "Java Programming", new BigDecimal(200));
 
+        bookDao.create(book);
+        bookDao.findAll().forEach(System.out::println);
+        System.out.println();
+        System.out.println("Id 1 " + System.lineSeparator() + bookDao.findById(1L));
+        bookDao.deleteById(2L);
+        bookDao.findAll().forEach(System.out::println);
+        System.out.println();
+        bookDao.update(book);
+        bookDao.findAll().forEach(System.out::println);
     }
 }

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 +1,120 @@
+package mate.academy.dao;
+
+import java.math.BigDecimal;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+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;
+import mate.academy.util.ConnectionUtil;
+
+@Dao
+public class BookDaoImpl implements BookDao {
+
+    @Override
+    public Book create(Book book) {
+        String sql = "INSERT INTO books (title, price) VALUES (?, ?)";
+
+        try (PreparedStatement statement = ConnectionUtil.getConnection().prepareStatement(sql,
+                Statement.RETURN_GENERATED_KEYS)) {
+            statement.setString(1, book.getTitle());
+            statement.setBigDecimal(2, book.getPrice());
+
+            int affectedRows = statement.executeUpdate();
+
+            if (affectedRows < 1) {
+                throw new DataProcessingException("Creating book failed, no rows affected.");
+            }
+
+            try (ResultSet generatedKeys = statement.getGeneratedKeys()) {
+                if (generatedKeys.next()) {
+                    book.setId(generatedKeys.getObject(1, Long.class));
+                } else {
+                    throw new DataProcessingException("Creating book failed, no ID obtained.");
+                }
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't create book " + book, e);
+        }
+
+        return book;
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        String sql = "SELECT * FROM books WHERE id = ?";
+
+        try (PreparedStatement statement = ConnectionUtil.getConnection().prepareStatement(sql)) {
+            statement.setLong(1, id);
+
+            try (ResultSet resultSet = statement.executeQuery()) {
+                if (resultSet.next()) {
+                    return Optional.of(getBook(resultSet));
+                }
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't find by id for id = " + id, e);
+        }
+
+        return Optional.empty();
+    }
+
+    @Override
+    public List<Book> findAll() {
+        List<Book> books = new ArrayList<>();
+        String sql = "SELECT * FROM books";
+
+        try (PreparedStatement statement = ConnectionUtil.getConnection().prepareStatement(sql);
+                ResultSet resultSet = statement.executeQuery()) {
+
+            while (resultSet.next()) {
+                books.add(getBook(resultSet));
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't retrieve all books", e);
+        }
+
+        return books;
+    }
+
+    @Override
+    public Book update(Book book) {
+        String sql = "UPDATE books SET price = ?, title = ? WHERE id = ?";
+        try (PreparedStatement statement = ConnectionUtil.getConnection().prepareStatement(sql)) {
+            statement.setBigDecimal(1, book.getPrice());
+            statement.setString(2, book.getTitle());
+            statement.setLong(3, book.getId());
+            if (statement.executeUpdate() > 0) {
+                return book;
+            } else {
+                throw new DataProcessingException("No book found with id = " + book.getId(),
+                        new RuntimeException());
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't update book with id = " + book.getId(), e);
+        }
+    }
+
+    @Override
+    public boolean deleteById(Long id) {
+        String sql = "DELETE FROM books WHERE id = ?";
+        try (PreparedStatement statement = ConnectionUtil.getConnection().prepareStatement(sql)) {
+            statement.setLong(1, id);
+            return statement.executeUpdate() > 0;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't delete book with id = " + id, e);
+        }
+    }
+
+    private Book getBook(ResultSet resultSet) throws SQLException {
+        Long id = resultSet.getObject("id", Long.class);
+        BigDecimal price = resultSet.getObject("price", BigDecimal.class);
+        String title = resultSet.getString("title");
+        return new Book(id, title, price);
+    }
+}

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

@@ -0,0 +1,11 @@
+package mate.academy.exception;
+
+public class DataProcessingException extends RuntimeException {
+    public DataProcessingException(String message, Throwable ex) {
+        super(message, ex);
+    }
+
+    public DataProcessingException(String message) {
+        super(message);
+    }
+}

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

@@ -0,0 +1,48 @@
+package mate.academy.model;
+
+import java.math.BigDecimal;
+
+public class Book {
+    private Long id;
+    private String title;
+    private BigDecimal 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 BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{"
+                + "id = " + id
+                + " title = " + title
+                + " price = " + price
+                + '}';
+    }
+}

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

@@ -0,0 +1,27 @@
+package mate.academy.util;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+public class ConnectionUtil {
+    private static final String DB_URL = "jdbc:mysql://localhost:3306/bookstore";
+    private static final Properties DB_PROPERTIES;
+
+    static {
+        DB_PROPERTIES = new Properties();
+        DB_PROPERTIES.put("user", "root");
+        DB_PROPERTIES.put("password", "qwertyasd");
+
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("Can not load JDBC", e);
+        }
+    }
+
+    public static Connection getConnection() throws SQLException {
+        return DriverManager.getConnection(DB_URL, DB_PROPERTIES);
+    }
+}

src/main/resources/init_db.sql

@@ -0,0 +1,16 @@
+CREATE DATABASE IF NOT EXISTS BookStore DEFAULT CHARACTER SET utf8;
+
+USE BookStore;
+
+CREATE TABLE Books (
+    id BIGINT AUTO_INCREMENT,
+    title VARCHAR(255) NOT NULL,
+    price DECIMAL(10, 2) NOT NULL,
+    PRIMARY KEY (id)
+    );
+
+INSERT INTO Books (title, price) VALUES ('The Great Gatsby', 10.99);
+INSERT INTO Books (title, price) VALUES ('1984', 8.99);
+INSERT INTO Books (title, price) VALUES ('To Kill a Mockingbird', 12.50);
+INSERT INTO Books (title, price) VALUES ('Pride and Prejudice', 9.75);
+INSERT INTO Books (title, price) VALUES ('The Catcher in the Rye', 11.20);