Java tutorial
/* MetaDB: A Distributed Metadata Collection Tool Copyright 2011, Lafayette College, Eric Luhrs, Haruki Yamaguchi, Long Ho. This file is part of MetaDB. MetaDB is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. MetaDB is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with MetaDB. If not, see <http://www.gnu.org/licenses/>. */ package edu.lafayette.metadb.web.userman; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; 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; import edu.lafayette.metadb.model.commonops.MetaDbHelper; import edu.lafayette.metadb.model.userman.User; import edu.lafayette.metadb.model.userman.UserManDAO; /** * Servlet implementation class ShowUsers */ public class ShowUsers extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub PrintWriter out = response.getWriter(); JSONObject output = new JSONObject(); JSONArray admins = new JSONArray(); JSONArray workers = new JSONArray(); JSONObject permissions = new JSONObject(); try { ArrayList<User> userList = UserManDAO.getUserList(); for (User u : userList) { JSONObject user = new JSONObject(); JSONObject info = new JSONObject(); info.put("auth_type", u.getAuthType()); info.put("user_type", u.getType()); user.put("username", u.getUserName()); permissions.put(u.getUserName(), info); if (u.getType().equals("admin")) admins.put(user); else workers.put(user); } output.put("admins", admins); output.put("workers", workers); output.put("permissions", permissions); out.print(output); } catch (Exception e) { MetaDbHelper.logEvent(e); } out.flush(); } }