commit

pom.xml

@@ -13,5 +13,19 @@
         <maven.compiler.target>17</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
+    <dependencies>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.28</version>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok-maven-plugin</artifactId>
+            <version>1.18.20.0</version>
+            <scope>provided</scope>
+        </dependency>
+
+    </dependencies>
 
 </project>

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

@@ -1,7 +1,28 @@
 package mate.academy;
 
+import mate.academy.dao.BookDao;
+import mate.academy.lib.Injector;
+import mate.academy.model.Book;
+
+import java.math.BigDecimal;
+
 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("Harry Potter", BigDecimal.valueOf(400));
+        Book book2 = new Book("Harry Potter2", BigDecimal.valueOf(450));
+        Book book3 = new Book("Harry Potter3", BigDecimal.valueOf(490));
+        System.out.println("added " + bookDao.create(book));
+        System.out.println("added " + bookDao.create(book2));
+        System.out.println("added " + bookDao.create(book3));
+        System.out.println("all books: " + bookDao.findAll());
+        book3.setTitle("Will");
+        book3.setPrice(BigDecimal.valueOf(300));
+        System.out.println("updated " + bookDao.update(book3));
+        System.out.println("all books with update " + bookDao.findAll());
+        System.out.println("find by id " + bookDao.findById(3L));
+        bookDao.deleteById(3l);
+        System.out.println("all books after delete " + bookDao.findAll());
     }
 }

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

@@ -0,0 +1,14 @@
+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/impl/BookDaoImpl.java

@@ -0,0 +1,103 @@
+package mate.academy.dao.impl;
+
+import mate.academy.dao.BookDao;
+import mate.academy.exception.DataProcessingException;
+import mate.academy.lib.Dao;
+import mate.academy.model.Book;
+import mate.academy.util.ConnectionUtil;
+
+import java.math.BigDecimal;
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+@Dao
+public class BookDaoImpl implements BookDao {
+    @Override
+    public Book create(Book book) {
+        String insert = "INSERT INTO books (title, price) VALUES (?, ?)";
+        try (Connection connection = ConnectionUtil.getConnection();
+             PreparedStatement statement = connection.prepareStatement(insert, Statement.RETURN_GENERATED_KEYS)) {
+            statement.setString(1, book.getTitle());
+            statement.setBigDecimal(2, book.getPrice());
+            statement.executeUpdate();
+            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 add book to db ", e);
+        }
+        return book;
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        String query = "SELECT id, title, price FROM books WHERE id = ?;";
+        Book book = null;
+        try (Connection connection = ConnectionUtil.getConnection();
+             PreparedStatement statement = connection.prepareStatement(query)) {
+            statement.setLong(1, id);
+            ResultSet resultSet = statement.executeQuery();
+            if (resultSet.next()) {
+                book = getBookFromResultSet(resultSet);
+            }
+            } catch(SQLException e){
+                throw new DataProcessingException("Couldn't find book by id " + id, e);
+            }
+            return Optional.ofNullable(book);
+        }
+
+    @Override
+    public List<Book> findAll () {
+        String query = "SELECT id, title, price FROM books";
+        List<Book> bookList = new ArrayList<>();
+        try (Connection connection = ConnectionUtil.getConnection();
+             PreparedStatement statement = connection.prepareStatement(query)) {
+            ResultSet resultSet = statement.executeQuery();
+            while (resultSet.next()) {
+                bookList.add(getBookFromResultSet(resultSet));
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Couldn't get all books", e);
+        }
+        return bookList;
+    }
+
+    @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(1, book.getTitle());
+            statement.setBigDecimal(2, book.getPrice());
+            statement.setLong(3, book.getId());
+            statement.executeUpdate();
+        } catch (SQLException e) {
+            throw new DataProcessingException("Couldn't update book by 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(1, id);
+            int deletedRows = statement.executeUpdate();
+            return deletedRows > 0;
+        } catch (SQLException e) {
+        throw new DataProcessingException("Couldn't delete book by id " + id, e);
+        }
+    }
+
+    private Book getBookFromResultSet(ResultSet resultSet) throws SQLException {
+        long id = resultSet.getObject(1, Long.class);
+        String title = resultSet.getString("title");
+        BigDecimal price = resultSet.getBigDecimal("price");
+        Book book = new Book(id, title, price);
+        return book;
+    }
+}

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) {
+        super(message);
+    }
+
+    public DataProcessingException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

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

@@ -0,0 +1,53 @@
+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 Book(String title, BigDecimal price) {
+    this.title = title;
+    this.price = 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 +1,32 @@
+package mate.academy.util;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+public class ConnectionUtil {
+    public static final String URL = "jdbc:mysql://localhost:3306/library";
+    public static final String USERNAME = "root";
+    public static final String PASSWORD = "olegAndriy";
+    private static final String JDBC_DRIVER = "com.mysql.cj.jdbc.Driver";
+
+    static {
+        try {
+            Class.forName(JDBC_DRIVER);
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("Can't load JDBC driver for MySQL", e);
+        }
+    }
+
+        public static Connection getConnection() {
+            Properties dbProperties = new Properties();
+            dbProperties.setProperty("user", USERNAME);
+            dbProperties.setProperty("password", PASSWORD);
+            try {
+                return DriverManager.getConnection(URL, dbProperties);
+            } catch (SQLException e) {
+                throw new RuntimeException("Can't create connection to DataBase", e);
+            }
+        }
+    }

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 NOT NULL,
+                       PRIMARY KEY (id)
+);