Java tutorial
/** * myJerry | Evenstar * Copyright (C) 2010 myJerry Development Team * http://www.myjerry.org * * The file is licensed under the the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * * See the License for the specific language governing permissions and * limitations under the License. * */ package org.myjerry.evenstar.web.admin; import java.util.ArrayList; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.myjerry.evenstar.service.BlogService; import org.myjerry.util.StringUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.multiaction.MultiActionController; import com.google.appengine.api.users.UserService; import com.google.appengine.api.users.UserServiceFactory; public class CreateBlogController extends MultiActionController { @Autowired private BlogService blogService; public ModelAndView view(HttpServletRequest request, HttpServletResponse response) throws Exception { ModelAndView mav = new ModelAndView(); UserService userService = UserServiceFactory.getUserService(); if (!userService.isUserAdmin()) { mav.setViewName(".noaccess"); } mav.setViewName(".admin.create.blog"); return mav; } public ModelAndView submit(HttpServletRequest request, HttpServletResponse response) throws Exception { // check for requisite parameters String blogTitle = request.getParameter("blogTitle"); String blogAddress = request.getParameter("blogAddress"); String blogAlias = request.getParameter("blogAlias"); ModelAndView mav = new ModelAndView(); mav.setViewName(".admin.create.blog"); List<String> validationErrors = new ArrayList<String>(); if (StringUtils.isNotBlank(blogTitle) && StringUtils.isNotBlank(blogAddress)) { if (this.blogService.existsBlogName(blogTitle)) { validationErrors.add("A blog with the same name already exists."); } if (this.blogService.existsBlogAddress(blogAddress)) { validationErrors.add("A blog with the same address already exists."); } if (this.blogService.existsBlogAlias(blogAlias)) { validationErrors.add("A blog with the same alias already exists."); } if (validationErrors.size() == 0) { try { boolean result = this.blogService.createBlog(blogTitle, blogAddress, blogAlias); if (!result) { validationErrors.add("Error creating blog"); } else { mav.setViewName(".admin.create.blog.complete"); } } catch (Exception e) { validationErrors.add("Error creating blog"); } } } else { } mav.addObject("validationErrors", validationErrors); return mav; } /** * @return the blogService */ public BlogService getBlogService() { return blogService; } /** * @param blogService the blogService to set */ public void setBlogService(BlogService blogService) { this.blogService = blogService; } }