London Student London Student - 1 month ago 9
SQL Question

Passing Date from an HTML form to a servlet to an SQL database

Hi guys I am having a problem getting an inputed date (yyyyMMdd) from an HTML form to a sql database via a servlet. The date from the form passes to the servlet as a string but then somehow I need to convert it to date for storing in the database.

I have tried a number of methods, date formatter etc.. A possible way of doing it is to convert it to a long and then format it however this seems like a slight bodge.

Any thoughts would be appreciated.

Okay this includes the code of the form and the servlet. I have left the buisness object out.

The form.....

<html>
<head>
<title>Inputing Episode Into Sons Of Anarchy Database</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>

<body>
<h1>Add Sons Of Anarchy Episode to Database</h1>
<form name="sonsOfAnarchyForm" method="get" action="EnterpriseCWEverything\src\coursework\Servlet2.java">
<p>Season Number:
<input name="seasonNumber" type="text" id="seasonNumber">
</p>
<p>Season Episode Number:
<input name="seasonEpisodeNumber" type="text" id="seasonEpisodeNumber">
</p>
<p>Series Episode Number:
<input name="seriesEpisodeNumber" type="text" id="seriesEpisodeNumber">
</p>
<p>Episode Title:
<input name="title" type="text" id="title">
</p>
<p>Written By:
<input name="writtenBy" type="text" id="writtenBy">
</p>
<p>DirectedBy:
<input name="directedBy" type="text" id="directedBy">
</p>
<p>Original Air Date (YYYY-MM-DD):
<input name="origionalAirDate" type="text" id="origionalAirDate">
</p>
<p>Viewing Figures US (Millions):
<input name="viewingFigures" type="text" id="viewingFigures">
</p>
<p>
<input name="addEpisode" type="submit" value="Add Episode">
</p>
</form>
</body>
</html>


The Servlet.... (Sorry tried using the code samle facility but for whatever reason It was not loving it.)

package coursework;

import javax.servlet.*;
import java.util.Date;
import javax.servlet.http.*;
import java.io.*;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;

public class Servlet2 extends HttpServlet
{

public void doGet (HttpServletRequest rq, HttpServletResponse rp) throws ServletException, IOException
{
rp.setContentType("text/html");
PrintWriter out = rp.getWriter();
out.println("<HTML>");
out.println("<HEAD><TITLE> Insert - Test </TITLE></HEAD>");
out.println("<BODY>");
try
{
ArrayList<Episode> episodes;
episodes = new ArrayList<Episode>();
String url = "jdbc:mysql://localhost:3306/sons_of_anarchy";
String driver = "com.mysql.jdbc.Driver";
Class.forName(driver);
Connection connection = DriverManager.getConnection(url,"root","password");

// Convert string to date
//String temp1;
//long temp;
//temp = Long.parseLong(rq.getParameter("origionalAirDate"));
//temp1 = rq.getParameter("origionalAirDate");

//Problem Code................................................
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
Date date = formatter.parse(rq.getParameter("origionalAirDate"));

//SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");
//Date date = formatter.format(rq.getParameter("origionalAirDate"));



// Set the new instance of the episode row
Episode temp;
episodes.add(temp = new Episode(Integer.parseInt(rq.getParameter("seasonNumber")), Integer.parseInt(rq.getParameter("seasonEpisodeNumber")), Integer.parseInt(rq.getParameter("seriesEpisodeNumber")), rq.getParameter("title"), rq.getParameter("directedBy"), rq.getParameter("writtenBy"), date , Float.parseFloat(rq.getParameter("viewingFigures"))));
PreparedStatement editStatement = connection.prepareStatement("INSERT into episode_guide");
// Put in database
editStatement.setInt(1, temp.getSeasonNumber());
editStatement.setInt(2, temp.getSeasonEpisodeNumber());
editStatement.setInt(3, temp.getSeriesEpisodeNumber());
editStatement.setString(4, temp.getTitle());
editStatement.setString(5, temp.getDirectedBy());
editStatement.setString(6, temp.getWrittenBy());
editStatement.setDate(7, (java.sql.Date) temp.getOrigionalAirDate());
editStatement.setFloat(8, temp.getViewingFigures());

editStatement.executeUpdate();
editStatement.close();
connection.close();

// Print out new entry
int i = 0;
while(i < episodes.size()){
out.print(episodes.get(i).getSeasonNumber()+
"\t"+ episodes.get(i).getSeasonEpisodeNumber()+
"\t"+ episodes.get(i).getSeriesEpisodeNumber() +
"\t"+ episodes.get(i).getTitle()+
"\t"+ episodes.get(i).getDirectedBy()+
"\t"+ episodes.get(i).getWrittenBy()+
"\t"+ episodes.get(i).getOrigionalAirDate()+
"\t"+ episodes.get(i).getViewingFigures());

out.print("<br>");
i++;
}
}
catch (Exception e)
{
out.println("Error" + e);
}
out.println("<H3> Basic Insert Servlet </H3>");
out.println("Result...");
out.println("</BODY></HTML>");
}
}


Sorry for the extended dribble but in context maybee it makes more sense.

Answer
            ArrayList<BuisnessObject> episodes;
        episodes = new ArrayList<BuisnessObject>();
        String url = "jdbc:mysql://localhost:3306/sons_of_anarchy";
        String driver = "com.mysql.jdbc.Driver";
        Class.forName(driver);          
        Connection connection = DriverManager.getConnection(url,"root","password");


        BuisnessObject newEpisode;

        // Takes the date from the form in String and converts it java.util.date which is how the buisness object is written
        java.util.Date date = new SimpleDateFormat("yyyy-MM-dd").parse(rq.getParameter("origionalAirDate")); 

        // Creates an instance of the buisness object
        episodes.add(newEpisode = new BuisnessObject(Integer.parseInt(rq.getParameter("seasonNumber")), Integer.parseInt(rq.getParameter("seasonEpisodeNumber")), Integer.parseInt(rq.getParameter("seriesEpisodeNumber")), rq.getParameter("title"), rq.getParameter("directedBy"), rq.getParameter("writtenBy"), date, Float.parseFloat(rq.getParameter("viewingFigures"))));
        PreparedStatement editStatement = connection.prepareStatement("INSERT into episode_guide VALUES (null,?,?,?,?,?,?,?,?)");

        // Takes date from java.util.date and converts it to java.sql.date
        java.sql.Date mySqlDate = new java.sql.Date(newEpisode.origionalAirDate.getTime());


        editStatement.setInt(1, newEpisode.getSeasonNumber());
        editStatement.setInt(2, newEpisode.getSeasonEpisodeNumber());
        editStatement.setInt(3, newEpisode.getSeriesEpisodeNumber());
        editStatement.setString(4, newEpisode.getTitle());          
        editStatement.setString(5, newEpisode.getDirectedBy());
        editStatement.setString(6, newEpisode.getWrittenBy());
        editStatement.setDate(7, mySqlDate);
        editStatement.setFloat(8, (float) newEpisode.getViewingFigures());

        editStatement.executeUpdate();
        editStatement.close();
        connection.close();

Several hours later and it works... Thanks