Java tutorial
/* * 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. */ package color; import com.google.gson.JsonObject; import java.io.IOException; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.SQLException; import java.sql.SQLNonTransientConnectionException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import support.DBHelper; import support.Library; /** * * @author bhaumik */ public class AddUpdateColorMaster 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 { final DBHelper helper = DBHelper.GetDBHelper(); final Connection dataConnection = helper.getConnMpAdmin(); final Library lb = Library.getInstance(); String colour_cd = request.getParameter("colour_cd"); final String colour_name = request.getParameter("colour_name"); final String user_id = request.getParameter("user_id"); final JsonObject jResultObj = new JsonObject(); if (dataConnection != null) { try { if (colour_cd.equalsIgnoreCase("")) { colour_cd = lb.generateKey(dataConnection, "COLOURMST", "COLOUR_CD", "C", 7); String sql = "insert into COLOURMST (COLOUR_CD,colour_name,user_id) values(?,?,?)"; PreparedStatement pstLocal = dataConnection.prepareStatement(sql); pstLocal.setString(1, colour_cd); pstLocal.setString(2, colour_name); pstLocal.setString(3, user_id); pstLocal.executeUpdate(); } else if (!colour_cd.equalsIgnoreCase("")) { String sql = "update COLOURMST set colour_name=?,edit_no=edit_no+1,user_id=?,time_stamp=current_timestamp where COLOUR_CD=?"; PreparedStatement pstLocal = dataConnection.prepareStatement(sql); pstLocal.setString(1, colour_name); pstLocal.setString(2, user_id); pstLocal.setString(3, colour_cd); pstLocal.executeUpdate(); } jResultObj.addProperty("result", 1); jResultObj.addProperty("Cause", "success"); jResultObj.addProperty("colour_cd", colour_cd); } catch (SQLNonTransientConnectionException ex1) { jResultObj.addProperty("result", -1); jResultObj.addProperty("Cause", "Server is down"); } catch (SQLException ex) { jResultObj.addProperty("result", -1); jResultObj.addProperty("Cause", ex.getMessage()); } } response.getWriter().print(jResultObj); } // <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 { processRequest(request, response); } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> }