RegistrationServlet.java Source code

Introduction

Here is the source code for RegistrationServlet.java

Source

/*
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import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Enumeration;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.simple.JSONObject;

/**
 *
 * @author Shaheed
 */
@WebServlet(urlPatterns = { "/RegistrationServlet" })
public class RegistrationServlet extends HttpServlet {

    private Connection conn = null;
    private Statement stmt = null;

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        JSONObject json = new JSONObject();

        Enumeration paramNames = request.getParameterNames();
        String params[] = new String[3];
        int i = 0;
        while (paramNames.hasMoreElements()) {
            String paramName = (String) paramNames.nextElement();
            //System.out.println("ParamName : " +paramName);

            String[] paramValues = request.getParameterValues(paramName);
            params[i] = paramValues[0];
            //System.out.println("ParamValue : " +params[i]);

            i++;
        }

        DatabaseHandler db = new DatabaseHandler();

        conn = db.makeConnection();
        try {
            stmt = conn.createStatement();

            //params[0]=password,params[1]=name,params[2]=email
            String query = "INSERT INTO user (name,email,password) VALUES (\"" + params[1] + "\",\"" + params[2]
                    + "\",\"" + params[0] + "\")";
            //System.out.println(query);

            int updatedRows = stmt.executeUpdate(query);
            if (updatedRows == 1) {
                json.put("reply", "done");
            } else {
                json.put("reply", "undone");
            }

        } catch (SQLException ex) {
            Logger.getLogger(RegistrationServlet.class.getName()).log(Level.SEVERE, null, ex);
        }

        //System.out.println(updatedRows);
        //System.out.println(json);

        response.setContentType("application/json");
        response.setCharacterEncoding("UTF-8");
        response.getWriter().write(json.toString());

        //closing mysql connection (now done in DatanaseHandler class)
        db.closeAllConnections(conn, stmt);

    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) {
        try {
            doGet(request, response);
        } catch (ServletException ex) {
            Logger.getLogger(RegistrationServlet.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(RegistrationServlet.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

}