package cs3220.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/HelloJDBC")
public class HelloJDBC extends HttpServlet {
private static final long serialVersionUID = 1L;
public HelloJDBC()
{
super();
}
public void init( ServletConfig config ) throws ServletException
{
super.init( config );
try
{
Class.forName( "com.mysql.cj.jdbc.Driver" );
}
catch( ClassNotFoundException e )
{
throw new ServletException( e );
}
}
protected void doGet( HttpServletRequest request,
HttpServletResponse response ) throws ServletException, IOException
{
PrintWriter out = response.getWriter();
out.println( "<!DOCTYPE html>" );
out.println( "<html><head><title>Hello JDBC</title></head><body>" );
Connection c = null;
try
{
String url = "jdbc:mysql://localhost/cs3220stu31";
String username = "cysun";
String password = "abcd";
c = DriverManager.getConnection( url, username, password );
Statement stmt = c.createStatement();
ResultSet rs = stmt.executeQuery( "select * from items" );
while( rs.next() )
{
out.println( rs.getString( "name" ) );
out.println( rs.getString( "price" ) );
out.println( rs.getFloat( "quantity" ) );
out.println( "<br>" );
}
c.close();
}
catch( SQLException e )
{
throw new ServletException( e );
}
finally
{
try
{
if( c != null ) c.close();
}
catch( SQLException e )
{
throw new ServletException( e );
}
}
out.print( "</body></html>" );
}
}