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 mypackage; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import com.mongodb.MongoClient; import java.io.IOException; import java.io.PrintWriter; import java.util.Set; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.json.JSONArray; import org.json.JSONObject; /** * * @author Kapil Gehlot */ public class CreateColl extends HttpServlet { public boolean collectionExists(String name, DB db) { Set<String> collNames = db.getCollectionNames(); for (final String n : collNames) { if (n.equalsIgnoreCase(name)) { return true; } } return false; } protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); try (PrintWriter out = response.getWriter()) { try { String getDBName = request.getParameter("dbname"); String getCollName = request.getParameter("collname"); MongoClient mongoClient = new MongoClient("localhost", 27017); DB mongoDatabase = mongoClient.getDB(getDBName); DBObject bObject = new BasicDBObject(); bObject.put(getDBName, getCollName); if (!collectionExists(getDBName, mongoDatabase)) { mongoDatabase.createCollection(getCollName, bObject); //BasicDBObject doc = new BasicDBObject(); // doc.put("name",getCollName); // dBCollection.insert(doc); out.print("true"); } else { out.print("false"); } } catch (Exception e) { } } } // <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> }