workspace.java Source code

Java tutorial

  1. HOME
  2. Java
  3. workspace.java

Introduction

Here is the source code for workspace.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
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 javax.servlet.http.HttpSession;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;

/**
 *
 * @author root
 */
@WebServlet(urlPatterns = { "/workspace" })
public class workspace 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");
        PrintWriter out = response.getWriter();
        try {
            /* 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 workspace</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet workspace at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        } finally {
            out.close();
        }
    }

    private JSONArray getJsonArrayFromStringArray(String[] a, String[] b) {
        JSONObject[] obj = new JSONObject[a.length];
        JSONArray ja = new JSONArray();
        for (int i = 0; i < a.length; i++) {
            obj[i] = new JSONObject();
            obj[i].put("pa", b[i]);
            obj[i].put("stud", a[i]);
            ja.add(obj[i]);
        }
        return ja;
    }

    private void current(PrintWriter out, String class1) throws Exception {
        String[] students = util.getStudents(class1);

        JSONArray ja = new JSONArray(), ja1 = new JSONArray();
        JSONObject mainObj = new JSONObject();
        ja = getJsonArrayFromStringArray(students, util.pa);
        mainObj.put("students", ja);
        StringWriter out1 = new StringWriter();
        mainObj.writeJSONString(out1);

        String jsonText = out1.toString();
        out.println(jsonText);
    }

    private void importlast(PrintWriter out, String class1, String hour) throws Exception {
        String[] students = util.getStudents(class1);
        String[] pa = util.getpa(class1, hour);
        JSONArray ja = new JSONArray(), ja1 = new JSONArray();
        JSONObject mainObj = new JSONObject();
        ja = getJsonArrayFromStringArray(students, pa);
        mainObj.put("students", ja);
        StringWriter out1 = new StringWriter();
        mainObj.writeJSONString(out1);

        String jsonText = out1.toString();
        out.println(jsonText);
    }

    // <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 {
        PrintWriter out = response.getWriter();
        String class1 = request.getParameter("class");
        String hour = request.getParameter("hour");
        HttpSession session = request.getSession(false);
        if (session == null) {
            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        } else {
            if (hour == null) {
                try {
                    current(out, class1);
                } catch (Exception e) {
                }
            } else {
                try {
                    importlast(out, class1, hour);
                } catch (Exception e) {
                }
            }
        }
    }

    /**
     * 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 {
        doGet(request, response);

    }

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

}