servlets.StudentServlet.java Source code

Introduction

Here is the source code for servlets.StudentServlet.java
Source

/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package servlets;

import daos.StudentDAO;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import models.IdCard;
import models.Student;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;

/**
 *
 * @author GeForce
 */
public class StudentServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet StudentServlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet StudentServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try (PrintWriter out = response.getWriter()) {
            try {
                StudentDAO stDao = new StudentDAO();
                Student st = new Student();
                IdCard idCard = new IdCard();
                JSONParser parser = new JSONParser();
                try {
                    JSONObject jsonObj = (JSONObject) parser.parse(new BufferedReader(request.getReader()));
                    st.setName((String) jsonObj.get("name"));
                    idCard.setIdNumber((String) jsonObj.get("idCard"));
                    st.setIdCard(idCard);
                    stDao.addStudent(st);
                } catch (Exception e) {
                    out.println(e.getCause());
                }
            } catch (Exception e) {
                out.println(e.getCause());
            }
        }
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}