Jv jdbc intro hw solution

pom.xml

@@ -18,6 +18,15 @@
         </maven.checkstyle.plugin.configLocation>
     </properties>
 
+    <dependencies>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>8.3.0</version>
+        </dependency>
+
+    </dependencies>
+
     <build>
         <plugins>
             <plugin>

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

@@ -1,7 +1,29 @@
 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 mainCamp = new Book();
+        mainCamp.setTitle("Main Camp");
+        mainCamp.setPrice(BigDecimal.valueOf(19.99));
+        bookDao.create(mainCamp);
+
+        Book lordOfTheRing = new Book();
+        lordOfTheRing.setTitle("Lord of the ring");
+        lordOfTheRing.setPrice(BigDecimal.valueOf(20.50));
+        bookDao.create(lordOfTheRing);
 
+        bookDao.findAll();
+        bookDao.findById(1L);
+        bookDao.update(lordOfTheRing).setPrice(BigDecimal.valueOf(40));
+        bookDao.deleteById(1L);
     }
 }

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

@@ -0,0 +1,26 @@
+package mate.academy.connection;
+
+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/test";
+    private static final Properties DB_PROPERTIES;
+
+    static {
+        DB_PROPERTIES = new Properties();
+        DB_PROPERTIES.put("user", "root");
+        DB_PROPERTIES.put("password", "Z170191erg");
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("Can`t load JDBC driver", e);
+        }
+    }
+
+    public static Connection getConnection(String sql) throws SQLException {
+        return DriverManager.getConnection(DB_URL,DB_PROPERTIES);
+    }
+}

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 +1,118 @@
+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.connection.ConnectionUtil;
+import mate.academy.exception.DataProcessingException;
+import mate.academy.model.Book;
+
+public class BookDaoImpl implements BookDao {
+    @Override
+    public Book create(Book book) {
+        String sql = "INSERT INTO books(title, price) VALUES (?, ?)";
+        try (Connection connection = ConnectionUtil.getConnection(sql);
+                PreparedStatement statement = connection.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 RuntimeException("Expected to insert at least one row");
+            }
+            ResultSet generatedKeys = statement.getGeneratedKeys();
+            if (generatedKeys.next()) {
+                Long id = generatedKeys.getLong(1);
+                book.setId(id);
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException("Cannot save data", e);
+        }
+        return book;
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        String sql = "SELECT * FROM books WHERE id = ?";
+        try (Connection connection = ConnectionUtil.getConnection(sql);
+                PreparedStatement statement = connection.prepareStatement(sql)) {
+            statement.setLong(1, id);
+            ResultSet resultSet = statement.executeQuery();
+            if (resultSet.next()) {
+                Long bookId = resultSet.getLong("id");
+                String title = resultSet.getString("title");
+                BigDecimal price = resultSet.getBigDecimal("price");
+                Book book = new Book();
+                book.setId(bookId);
+                book.setTitle(title);
+                book.setPrice(price);
+                return Optional.of(book);
+            } else {
+                return Optional.empty();
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Failed to find book with id: " + id);
+        }
+    }
+
+    @Override
+    public List<Book> findAll() {
+        String sql = "SELECT * FROM books";
+        List<Book> bookList = new ArrayList<>();
+        try (Connection connection = ConnectionUtil.getConnection(sql);
+                PreparedStatement statement = connection.prepareStatement(sql)) {
+            ResultSet resultSet = statement.executeQuery();
+            while (resultSet.next()) {
+                long id = resultSet.getLong("id");
+                String title = resultSet.getString("title");
+                BigDecimal price = resultSet.getBigDecimal("price");
+                Book book = new Book();
+                book.setId(id);
+                book.setTitle(title);
+                book.setPrice(price);
+                bookList.add(book);
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("can`t get book from DataBase ", e);
+        }
+        return bookList;
+    }
+
+    @Override
+    public Book update(Book book) {
+        String sql = "UPDATE books SET title = ?, price = ? WHERE id = ?";
+        try (Connection connection = ConnectionUtil.getConnection(sql);
+                PreparedStatement statement = connection.prepareStatement(sql)) {
+            statement.setString(1, book.getTitle());
+            statement.setBigDecimal(2, book.getPrice());
+            statement.setLong(3, book.getId());
+            int rowsUpdated = statement.executeUpdate();
+            if (rowsUpdated == 0) {
+                throw new DataProcessingException("Failed to update book with id: " + book.getId());
+            }
+            return book;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Failed to update book with id: " + book.getId() + e);
+        }
+    }
+
+    @Override
+    public boolean deleteById(Long id) {
+        String sql = "DELETE FROM books WHERE id = ?";
+        try (Connection connection = ConnectionUtil.getConnection(sql);
+                PreparedStatement statement = connection.prepareStatement(sql)) {
+            statement.setLong(1, id);
+            int rowsDeleted = statement.executeUpdate();
+            return rowsDeleted > 0;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Failed to delete book with id: " + id + e);
+        }
+    }
+}

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

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

@@ -0,0 +1,47 @@
+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/resources/init_db.sql

@@ -0,0 +1,6 @@
+CREATE TABLE `books` (
+    `id` INT NOT NULL AUTO_INCREMENT,
+    `bookTitle` VARCHAR(50),
+    `price` BIGINT,
+    PRIMARY KEY (`id`)
+);