Java tutorial
/* * Copyright 2002-2014 the original author or authors. * * Licensed under 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 com.work.petclinic.web; import java.util.Collection; import javax.validation.Valid; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.support.RedirectAttributes; import com.work.petclinic.model.Message; import com.work.petclinic.repository.MessageRepository; /** * @author Rob Winch * @author Arnaldo Piccinelli */ @Controller @RequestMapping("/messages") public class MessageController { @Autowired private MessageRepository messageRepository; @RequestMapping public String list(Model model) { Collection<Message> messages = this.messageRepository.findAll(); model.addAttribute("messages", messages); return "messages/messageList"; } @RequestMapping("{id}") public ModelAndView view(@PathVariable("id") Message message) { return new ModelAndView("messages/messageView", "message", message); } @RequestMapping(params = "form", method = RequestMethod.GET) public String createForm(@ModelAttribute Message message) { return "messages/messageForm"; } @RequestMapping(method = RequestMethod.POST) public ModelAndView create(@Valid Message message, BindingResult result, RedirectAttributes redirect) { if (result.hasErrors()) { return new ModelAndView("messages/messageForm", "formErrors", result.getAllErrors()); } message = this.messageRepository.save(message); redirect.addFlashAttribute("statusMessage", "Successfully created a new message"); return new ModelAndView("redirect:/messages/{message.id}", "message.id", message.getId()); } @RequestMapping("foo") public String foo() { throw new RuntimeException("Expected exception in controller"); } }