diff --git a/pom.xml b/pom.xml
index 683e84ec..1cc5b503 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,6 +18,16 @@
+
+
+
+ com.mysql
+ mysql-connector-j
+ 9.1.0
+
+
+
+
diff --git a/src/main/java/mate/academy/Main.java b/src/main/java/mate/academy/Main.java
index 0058fbf9..045de590 100644
--- a/src/main/java/mate/academy/Main.java
+++ b/src/main/java/mate/academy/Main.java
@@ -1,7 +1,28 @@
package mate.academy;
+import java.math.BigDecimal;
+import java.util.Arrays;
+import java.util.List;
+import mate.academy.dao.BookDao;
+import mate.academy.lib.Injector;
+import mate.academy.model.Book;
+
public class Main {
- public static void main(String[] args) {
+ private static final Injector injector = Injector.getInstance("mate.academy.dao");
+ public static void main(String[] args) {
+ BookDao bookDao = (BookDao) injector.getInstance(BookDao.class);
+ List books = Arrays.asList(
+ new Book(1L, "Book1", BigDecimal.valueOf(5.99)),
+ new Book(2L, "Book2", BigDecimal.valueOf(4.35)),
+ new Book(3L, "Book3", BigDecimal.valueOf(10.00))
+ );
+ books.forEach(bookDao::create);
+ Book secondBook = books.get(1);
+ secondBook.setTitle("Book4");
+ bookDao.update(secondBook);
+ System.out.println(bookDao.findById(2L));
+ System.out.println(bookDao.findAll());
+ bookDao.deleteById(3L);
}
}
diff --git a/src/main/java/mate/academy/dao/BookDao.java b/src/main/java/mate/academy/dao/BookDao.java
new file mode 100644
index 00000000..76326cd5
--- /dev/null
+++ b/src/main/java/mate/academy/dao/BookDao.java
@@ -0,0 +1,18 @@
+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 findById(long id);
+
+ List findAll();
+
+ Book update(Book book);
+
+ boolean deleteById(long id);
+
+}
diff --git a/src/main/java/mate/academy/dao/BookDaoImpl.java b/src/main/java/mate/academy/dao/BookDaoImpl.java
new file mode 100644
index 00000000..f4c514ca
--- /dev/null
+++ b/src/main/java/mate/academy/dao/BookDaoImpl.java
@@ -0,0 +1,112 @@
+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.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 String CREATE = "INSERT INTO books (title, price) VALUES (?, ?)";
+ private static final String FIND_BY_ID = "SELECT * FROM books WHERE id = ?";
+ private static final String FIND_ALL = "SELECT * FROM books";
+ private static final String UPDATE = "UPDATE books SET title = ?, price = ? WHERE id = ?";
+ private static final String DELETE_BY_ID = "DELETE FROM books WHERE id = ?";
+
+ @Override
+ public Book create(Book book) {
+ try (Connection connection = ConnectionUtil.getConnection();
+ PreparedStatement statement
+ = connection.prepareStatement(CREATE, Statement.RETURN_GENERATED_KEYS)) {
+ statement.setString(1, book.getTitle());
+ statement.setBigDecimal(2, book.getPrice());
+ statement.executeUpdate();
+
+ ResultSet generatedKeys = statement.getGeneratedKeys();
+ if (generatedKeys.next()) {
+ book.setId(generatedKeys.getLong(1));
+ }
+ } catch (SQLException e) {
+ throw new DataProcessingException("Can't create book: " + book, e);
+ }
+ return book;
+ }
+
+ @Override
+ public Optional findById(long id) {
+ try (Connection connection = ConnectionUtil.getConnection();
+ PreparedStatement statement = connection.prepareStatement(FIND_BY_ID)) {
+ statement.setLong(1, id);
+ ResultSet resultSet = statement.executeQuery();
+ if (resultSet.next()) {
+ return Optional.of(takeBook(resultSet));
+ }
+ } catch (SQLException e) {
+ throw new DataProcessingException("Can't find book by id: " + id, e);
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public List findAll() {
+ List books = new ArrayList<>();
+ try (Connection connection = ConnectionUtil.getConnection();
+ PreparedStatement statement = connection.prepareStatement(FIND_ALL)) {
+ ResultSet resultSet = statement.executeQuery();
+ while (resultSet.next()) {
+ books.add(takeBook(resultSet));
+ }
+ } catch (SQLException e) {
+ throw new DataProcessingException("Can't find all books", e);
+ }
+ return books;
+ }
+
+ @Override
+ public Book update(Book book) {
+ try (Connection connection = ConnectionUtil.getConnection();
+ PreparedStatement statement = connection.prepareStatement(UPDATE)) {
+ statement.setString(1, book.getTitle());
+ statement.setBigDecimal(2, book.getPrice());
+ statement.setLong(3, book.getId());
+ if (statement.executeUpdate() < 1) {
+ throw new DataProcessingException("Book with id "
+ + book.getId() + " does not found for update");
+ }
+ } catch (SQLException e) {
+ throw new DataProcessingException("Can't update book: " + book, e);
+ }
+ return book;
+ }
+
+ @Override
+ public boolean deleteById(long id) {
+ try (Connection connection = ConnectionUtil.getConnection();
+ PreparedStatement statement = connection.prepareStatement(DELETE_BY_ID)) {
+ statement.setLong(1, id);
+ return statement.executeUpdate() > 0;
+ } catch (SQLException e) {
+ throw new DataProcessingException("Can't delete book by id: " + id, e);
+ }
+ }
+
+ private Book takeBook(ResultSet resultSet) throws SQLException {
+ Long id = resultSet.getObject("id", Long.class);
+ String title = resultSet.getString("title");
+ BigDecimal price = resultSet.getBigDecimal("price");
+ Book book = new Book();
+ book.setId(id);
+ book.setTitle(title);
+ book.setPrice(price);
+ return book;
+ }
+}
diff --git a/src/main/java/mate/academy/exception/DataProcessingException.java b/src/main/java/mate/academy/exception/DataProcessingException.java
new file mode 100644
index 00000000..02f156f9
--- /dev/null
+++ b/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 ex) {
+ super(message, ex);
+ }
+
+ public DataProcessingException(String message) {
+ super(message);
+ }
+}
diff --git a/src/main/java/mate/academy/model/Book.java b/src/main/java/mate/academy/model/Book.java
new file mode 100644
index 00000000..fc3566e0
--- /dev/null
+++ b/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() {
+
+ }
+
+ public Book(Long id, String title, BigDecimal price) {
+ this.id = id;
+ 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
+ + '}';
+ }
+}
diff --git a/src/main/java/mate/academy/util/ConnectionUtil.java b/src/main/java/mate/academy/util/ConnectionUtil.java
new file mode 100644
index 00000000..e9aab3a8
--- /dev/null
+++ b/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/jdbc_intro";
+ private static final Properties DB_PROPERTIES;
+
+ static {
+ DB_PROPERTIES = new Properties();
+ DB_PROPERTIES.put("user", "root");
+ DB_PROPERTIES.put("password", "root");
+ try {
+ Class.forName("com.mysql.cj.jdbc.Driver");
+ } catch (ClassNotFoundException e) {
+ throw new RuntimeException("Cannot load the JDBC driver", e);
+ }
+ }
+
+ public static Connection getConnection() throws SQLException {
+ return DriverManager.getConnection(DB_URL, DB_PROPERTIES);
+ }
+}
diff --git a/src/main/resources/init_db.sql b/src/main/resources/init_db.sql
new file mode 100644
index 00000000..576c355f
--- /dev/null
+++ b/src/main/resources/init_db.sql
@@ -0,0 +1,5 @@
+CREATE TABLE books (
+ id BIGINT AUTO_INCREMENT PRIMARY KEY,
+ title VARCHAR(255) NOT NULL,
+ price DECIMAL(10, 2) NOT NULL
+);
\ No newline at end of file