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BookDAO_JDBC.java
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BookDAO_JDBC.java
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import java.util.ArrayList;
import java.util.List;
import java.sql.*;
public class BookDAO_JDBC implements BookDAO
{
Connection dbConnection;
public BookDAO_JDBC(Connection dbconn)
{
dbConnection = dbconn;
}
@Override
public Book getBookById(int id)
{
Book b = new Book();
String sql;
Statement stmt = null;
try
{
stmt = dbConnection.createStatement();
sql = "SELECT * FROM book where bid="+Integer.toString(id)+";";
ResultSet rs = stmt.executeQuery(sql);
while(rs.next())
{
int bid = rs.getInt("bid");
String name = rs.getString("name");
String author = rs.getString("author");
String publisher = rs.getString("publisher");
float price = rs.getFloat("price");
String edition = rs.getString("edition");
int totalcount = rs.getInt("totalcount");
int availablecount = rs.getInt("availablecount");
b.setId(bid);
b.setName(name);
b.setPublisher(publisher);
b.setAuthor(author);
b.setEdition(edition);
b.setPrice(price);
b.setTotalCount(totalcount);
b.setAvailableCount(availablecount);
break;
}
}
catch(SQLException e)
{
System.out.println("SQLException: "+e.getMessage());
System.out.println("SQLState: "+e.getSQLState());
System.out.println("VendorError: "+e.getErrorCode());
}
return b;
}
@Override
public void addBook(Book b)
{
PreparedStatement prepstmt = null;
String sql = "INSERT INTO book(bid, name, author, publisher, price, edition, totalcount, availablecount) VALUES (?, ?, ?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE totalcount=totalcount+?, availablecount=availablecount+?;";
try
{
prepstmt = dbConnection.prepareStatement(sql);
prepstmt.setInt(1, b.getId());
prepstmt.setString(2, b.getName());
prepstmt.setString(3, b.getAuthor());
prepstmt.setString(4, b.getPublisher());
prepstmt.setFloat(5, b.getPrice());
prepstmt.setString(6, b.getEdition());
prepstmt.setInt(7, b.getTotalCount());
prepstmt.setInt(8, b.getAvailableCount());
prepstmt.setInt(9, b.getTotalCount());
prepstmt.setInt(10, b.getTotalCount());
prepstmt.executeUpdate();
//dbConnection.commit();
System.out.println("Book "+b.getId()+" added to the database");
}
catch(SQLException e)
{
System.out.println(e.getMessage());
}
try
{
if(prepstmt!=null)
{
prepstmt.close();
}
}
catch(SQLException e)
{
System.out.println(e.getMessage());
}
}
}