Hibernate_until

pom.xml

@@ -18,6 +18,15 @@
         </maven.checkstyle.plugin.configLocation>
     </properties>
 
+    <dependencies>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.33</version>
+        </dependency>
+
+    </dependencies>
+
     <build>
         <plugins>
             <plugin>

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

@@ -0,0 +1,38 @@
+package mate.academy;
+
+public class Book {
+    private Long id;
+    private String title;
+    private int price;
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return this.title;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public void setPrice(int price) {
+        this.price = price;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{" + "id=" + id
+                + ", title='" + title + '\''
+                + ", price=" + price + '}';
+    }
+}

src/main/java/mate/academy/ConnectionUtill.java

@@ -0,0 +1,28 @@
+package mate.academy;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+public class ConnectionUtill {
+    private static final String DB_URL = "jdbc:mysql://localhost:3306/book";
+    private static final Properties DB_PROPERTIES;
+
+    static {
+        DB_PROPERTIES = new Properties();
+        DB_PROPERTIES.put("user", "Admin");
+        DB_PROPERTIES.put("password", "admin");
+
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("Can not load JDBC driver",e);
+        }
+    }
+
+    public static Connection getConnection() throws SQLException {
+        return DriverManager.getConnection(DB_URL, DB_PROPERTIES);
+    }
+
+}

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

@@ -1,7 +1,20 @@
 package mate.academy;
 
+import mate.academy.dao.BookDao;
+import mate.academy.dao.BookDaoImpl;
+
 public class Main {
     public static void main(String[] args) {
+        BookDao bookDao = new BookDaoImpl();
+        System.out.println(bookDao.get(3L));
+
+        Book kobzar = new Book();
+        kobzar.setTitle("Kobzar");
+        kobzar.setPrice(30);
+
+        Book kobzarUpdated = bookDao.save(kobzar);
+        System.out.println(kobzarUpdated);
 
     }
 }
+

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

@@ -0,0 +1,16 @@
+package mate.academy.dao;
+
+import java.util.Optional;
+import mate.academy.Book;
+
+public interface BookDao {
+    Book save(Book book);
+
+    Book get(Long id);
+
+    Optional<Book> findById(Long id);
+
+    Book update(Book book);
+
+    boolean delete(Book book);
+}

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

@@ -0,0 +1,74 @@
+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.Optional;
+import mate.academy.Book;
+import mate.academy.ConnectionUtill;
+
+public class BookDaoImpl implements BookDao {
+
+    @Override
+    public Book save(Book book) {
+        String sql = "INSERT INTO books (title, price) VALUES (?, ?)";
+        try (Connection connection = ConnectionUtill.getConnection();
+                    PreparedStatement statement = connection.prepareStatement(sql,
+                            Statement.RETURN_GENERATED_KEYS)) {
+            statement.setString(1, book.getTitle());
+            statement.setInt(2, book.getPrice());
+            int affectedRows = statement.executeUpdate();
+            if (affectedRows < 1) {
+                throw new RuntimeException("Expected to insert at least one row, "
+                        + "but inserted 0 rows");
+            }
+            ResultSet generatedKeys = statement.getGeneratedKeys();
+            if (generatedKeys.next()) {
+                Long id = generatedKeys.getObject(1, Long.class);
+                book.setId(id);
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException("Can't add new book: " + book, e);
+        }
+        return book;
+    }
+
+    @Override
+    public Book get(Long id) {
+        String sql = "SELECT * FROM books WHERE id = ?";
+        try (Connection connection = ConnectionUtill.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)) {
+            statement.setLong(1, id);
+            ResultSet resultSet = statement.executeQuery();
+            if (resultSet.next()) {
+                String title = resultSet.getString("title");
+                int price = resultSet.getObject("price", Integer.class);
+                Book book = new Book();
+                book.setId(id);
+                book.setPrice(price);
+                book.setTitle(title);
+                return book;
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException("Cannot create a connection to the DB", e);
+        }
+        return null;
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        return Optional.empty();
+    }
+
+    @Override
+    public Book update(Book book) {
+        return null;
+    }
+
+    @Override
+    public boolean delete(Book book) {
+        return false;
+    }
+}

src/main/resources/init_db.sql

@@ -0,0 +1,10 @@
+SELECT * FROM books;
+
+INSERT INTO books (id, title, price) VALUE (1,'Harry Potter', 25);
+
+
+UPDATE books SET title = 'Harry Potter' WHERE id = 1;
+
+DELETE FROM books WHERE id = 5;
+
+