Jv jdbc intro solution

pom.xml

@@ -55,4 +55,11 @@
             </plugins>
         </pluginManagement>
     </build>
+    <dependencies>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>9.0.0</version>
+        </dependency>
+    </dependencies>
 </project>

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

@@ -1,7 +1,50 @@
 package mate.academy;
 
+import java.math.BigDecimal;
+import java.util.List;
+import mate.academy.dao.BookDao;
+import mate.academy.lib.Injector;
+import mate.academy.models.Book;
+
 public class Main {
+    private static final Injector injector = Injector.getInstance("mate.academy.dao");
+
     public static void main(String[] args) {
+        BookDao bookDao = (BookDao) injector.getInstance(BookDao.class);
+
+        bookDao.create(new Book(1L, "Java Programming", new BigDecimal("1000.00")));
+        bookDao.create(new Book(2L, "Effective Java", new BigDecimal("1500.00")));
+        bookDao.create(new Book(3L, "Clean Code", new BigDecimal("2000.00")));
+        bookDao.create(new Book(4L, "Head First Java", new BigDecimal("2500.00")));
+        bookDao.create(new Book(5L, "Java Concurrency in Practice", new BigDecimal("3000.00")));
+
+        System.out.println("FULL list of books");
+        List<Book> list = bookDao.findAll();
+        for (Book book : list) {
+            System.out.println(book.getId() + " " + book.getTitle() + " " + book.getPrice());
+        }
+
+        System.out.println("\n" + "Finding book by index:" + list.get(0).getId());
+        Book book1 = bookDao.findById(list.get(0).getId())
+                .orElseThrow(() ->
+                        new RuntimeException("Objects with the specified ID do not exist"));
+        System.out.println(book1.getId() + " " + book1.getTitle() + " " + book1.getPrice());
+
+        System.out.println("\n" + "Updating book by index:" + list.get(0).getId());
+        bookDao.update(new Book(list.get(0).getId(), "Nikilen", new BigDecimal(100)));
+
+        Book book2 = bookDao.findById(list.get(0).getId())
+                .orElseThrow(() ->
+                        new RuntimeException("Objects with the specified ID do not exist"));
+
+        System.out.println(book2.getId() + " " + book2.getTitle() + " " + book2.getPrice());
+
+        System.out.println("\n" + "Deleting an object by index:" + list.get(0).getId());
 
+        if (bookDao.deleteById(list.get(0).getId())) {
+            System.out.println("The object is deleted");
+        } else {
+            System.out.println("The object does not exist");
+        }
     }
 }

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.models.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 +1,135 @@
+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.sql.Statement;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import mate.academy.exceptions.DataProcessingException;
+import mate.academy.lib.Dao;
+import mate.academy.models.Book;
+import mate.academy.util.ConnectionUtil;
+
+@Dao
+public class BookDaoImpl implements BookDao {
+    @Override
+    public Book create(Book book) {
+        String sqlCommand = "INSERT INTO books (title,price) VALUE (?,?)";
+
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement =
+                        connection.prepareStatement(sqlCommand, Statement.RETURN_GENERATED_KEYS)) {
+
+            preparedStatement.setString(1, book.getTitle());
+            preparedStatement.setBigDecimal(2, book.getPrice());
+
+            int affectedRows = preparedStatement.executeUpdate();
+            if (affectedRows < 1) {
+                throw new DataProcessingException("None of the rows have been added");
+            }
+
+            try (ResultSet generatedKeys = preparedStatement.getGeneratedKeys()) {
+                if (generatedKeys.next()) {
+                    long id = generatedKeys.getObject(1, Long.class);
+                    book.setId(id);
+                    return book;
+                } else {
+                    throw new DataProcessingException("Failed to retrieve the generated key");
+                }
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't add a book", e);
+        }
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        String sqlCommand = "SELECT * FROM books WHERE id = ?";
+
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement = connection.prepareStatement(sqlCommand)) {
+            preparedStatement.setLong(1, id);
+
+            try (ResultSet resultSet = preparedStatement.executeQuery()) {
+                if (resultSet.next()) {
+                    return Optional.of(getBookFromResultSet(resultSet));
+                }
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't find book by id", e);
+        }
+        return Optional.empty();
+    }
+
+    @Override
+    public List<Book> findAll() {
+        String sqlCommand = "SELECT * FROM books";
+        List<Book> result = new ArrayList<>();
+
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement = connection.prepareStatement(sqlCommand);
+                    ResultSet resultSet = preparedStatement.executeQuery()) {
+
+            while (resultSet.next()) {
+                result.add(getBookFromResultSet(resultSet));
+            }
+
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't find all books", e);
+        }
+
+        return result;
+    }
+
+    @Override
+    public Book update(Book book) {
+        String sqlCommand = "UPDATE books SET title=?, price=? WHERE id = ?";
+
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement = connection.prepareStatement(sqlCommand)) {
+
+            preparedStatement.setString(1, book.getTitle());
+            preparedStatement.setBigDecimal(2, book.getPrice());
+            preparedStatement.setLong(3, book.getId());
+
+            int affectedRows = preparedStatement.executeUpdate();
+            if (affectedRows < 1) {
+                throw new DataProcessingException("None of the rows have been updated");
+            }
+
+            return book;
+
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't update book", e);
+        }
+    }
+
+    @Override
+    public boolean deleteById(Long id) {
+        String sqlCommand = "DELETE FROM books WHERE id = ?";
+
+        try (Connection connection = ConnectionUtil.getConnection();
+                PreparedStatement preparedStatement = connection.prepareStatement(sqlCommand)) {
+
+            preparedStatement.setLong(1, id);
+
+            int affectedRows = preparedStatement.executeUpdate();
+            return affectedRows > 0;
+
+        } catch (SQLException e) {
+            throw new DataProcessingException("Can't delete book by id", e);
+        }
+    }
+
+    private Book getBookFromResultSet(ResultSet resultSet) throws SQLException {
+        Long id = resultSet.getObject("id", Long.class);
+        String title = resultSet.getObject("title", String.class);
+        BigDecimal price = resultSet.getObject("price", BigDecimal.class);
+
+        return new Book(id, title, price);
+    }
+}

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

@@ -0,0 +1,12 @@
+package mate.academy.exceptions;
+
+public class DataProcessingException extends RuntimeException {
+    public DataProcessingException(String message) {
+        super(message);
+    }
+
+    public DataProcessingException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
+

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

@@ -0,0 +1,39 @@
+package mate.academy.models;
+
+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 void setId(Long id) {
+        this.id = id;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+}

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

@@ -0,0 +1,22 @@
+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 URL = "jdbc:mysql://localhost:3306/test";
+    private static final Properties DB_PROPERTIES;
+
+    static {
+        DB_PROPERTIES = new Properties();
+        DB_PROPERTIES.put("user", "root");
+        DB_PROPERTIES.put("password", "henghfdf");
+    }
+
+    public static Connection getConnection() throws SQLException {
+        return DriverManager.getConnection(URL, DB_PROPERTIES);
+    }
+}

src/main/resources/init_db.sql

@@ -0,0 +1,6 @@
+CREATE TABLE `books`(
+    `id` BIGINT AUTO_INCREMENT,
+    `title` VARCHAR(255),
+    `price` DECIMAL,
+    PRIMARY KEY (`id`)
+);