implemented CRUD operations

pom.xml

@@ -17,7 +17,13 @@
             https://raw.githubusercontent.com/mate-academy/style-guides/master/java/checkstyle.xml
         </maven.checkstyle.plugin.configLocation>
     </properties>
-
+    <dependencies>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>8.1.0</version>
+        </dependency>
+    </dependencies>
     <build>
         <plugins>
             <plugin>

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

@@ -1,7 +1,37 @@
 package mate.academy;
 
+import java.math.BigDecimal;
+import java.util.List;
+import java.util.Optional;
+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();
+        book.setTitle("Java to Wood People");
+        book.setPrice(BigDecimal.valueOf(350));
+
+        //Create
+        Book createdBook = bookDao.create(book);
+
+        //findById
+        Optional<Book> bookById = bookDao.findById(3L);
+        System.out.println(bookById);
+
+        //findAll
+        List<Book> allBooksFromDb = bookDao.findAll();
+
+        //update
+        book.setTitle("JDBC for wood people, Part2");
+        book.setPrice(BigDecimal.valueOf(500));
+        Book updatedBook = bookDao.update(book);
 
+        //delete
+        bookDao.deleteById(4L);
     }
 }

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 +1,109 @@
+package mate.academy.dao;
+
+import java.sql.Connection;
+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 {
+    private static final int FIRST_PARAM = 1;
+    private static final int SECOND_PARAM = 2;
+    private static final int THIRD_PARAM = 3;
+    private static final long THIRD_ID = 3L;
+
+    @Override
+    public Book create(Book book) {
+        String query = "INSERT INTO books (title, price) VALUES (?, ?)";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement statement =
+                        connection.prepareStatement(query, Statement.RETURN_GENERATED_KEYS)) {
+            statement.setString(FIRST_PARAM, book.getTitle());
+            statement.setBigDecimal(SECOND_PARAM, book.getPrice());
+            ResultSet generatedKeys = statement.getGeneratedKeys();
+            if (generatedKeys.next()) {
+                Long id = generatedKeys.getObject(1, Long.class);
+                book.setId(id);
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can`t create a new book: " + book, e);
+        }
+        return book;
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        String query = "SELECT * FROM books WHERE id = ?";
+        Book bookFromDb = null;
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement statement = connection.prepareStatement(query)) {
+            statement.setLong(FIRST_PARAM, id);
+            ResultSet resultSet = statement.executeQuery();
+            if (resultSet.next()) {
+                bookFromDb = parseResultSetInBook(resultSet);
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can not find Book with id: " + id, e);
+        }
+        return Optional.ofNullable(bookFromDb);
+    }
+
+    @Override
+    public List<Book> findAll() {
+        String query = "SELECT * FROM books";
+        List<Book> allBooksFromDb = new ArrayList<>();
+        try (Connection connection = ConnectionUtil.getConnection();
+                 Statement statement = connection.createStatement()) {
+            ResultSet resultSet = statement.executeQuery(query);
+            while (resultSet.next()) {
+                allBooksFromDb.add(parseResultSetInBook(resultSet));
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can`t get all elements from DB.", e);
+        }
+        return allBooksFromDb;
+    }
+
+    @Override
+    public Book update(Book book) {
+        String query = "UPDATE books SET title = ?, price = ? WHERE id = ?";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement statement = connection.prepareStatement(query)) {
+            statement.setString(FIRST_PARAM, book.getTitle());
+            statement.setBigDecimal(SECOND_PARAM, book.getPrice());
+            statement.setLong(THIRD_PARAM, THIRD_ID);
+            statement.executeUpdate();
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can not update book with id: " + book.getId(), e);
+        }
+        return book;
+    }
+
+    @Override
+    public boolean deleteById(Long id) {
+        String query = "DELETE FROM books WHERE id = ?";
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement statement = connection.prepareStatement(query)) {
+            statement.setLong(FIRST_PARAM, id);
+            return statement.executeUpdate() > 0;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can not delete book by the id: " + id, e);
+        }
+    }
+
+    private Book parseResultSetInBook(ResultSet resultSet) throws SQLException {
+        Book dbBook = new Book();
+        dbBook.setId(resultSet.getObject("id", Long.class));
+        dbBook.setTitle(resultSet.getString("title"));
+        dbBook.setPrice(resultSet.getBigDecimal("price"));
+        return dbBook;
+    }
+}

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 ex) {
+        super(message, ex);
+    }
+}

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

@@ -1,8 +1,11 @@
 package mate.academy.lib;
 
+import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
 
 @Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
 public @interface Dao {
 }

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

@@ -0,0 +1,42 @@
+package mate.academy.model;
+
+import java.math.BigDecimal;
+
+public class Book {
+    private Long id;
+    private String title;
+    private BigDecimal 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
+                + '}';
+    }
+}

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/books_db";
+    private static final Properties DB_PROPERTIES;
+
+    static {
+        DB_PROPERTIES = new Properties();
+        DB_PROPERTIES.put("user", "root");
+        DB_PROPERTIES.put("password", "V11M07k2001mm");
+
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("Can not load the JDBC DRIVER", e);
+        }
+    }
+
+    public static Connection getConnection() throws SQLException {
+        return DriverManager.getConnection(DB_URL, DB_PROPERTIES);
+    }
+}

src/main/resources/init_db.sql

@@ -0,0 +1,11 @@
+CREATE database books_db;
+
+USE books_db;
+
+CREATE TABLE books (
+      id BIGINT NOT NULL AUTO_INCREMENT,
+      title VARCHAR(255),
+      price DECIMAL,
+      PRIMARY KEY (id)
+);
+