Java tutorial
/* * The MIT License * * Copyright (c) 2015, Mahmoud Ben Hassine (mahmoud@benhassine.fr) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package io.github.benas.todolist.web.servlet.todo; import io.github.todolist.core.domain.Priority; import io.github.todolist.core.domain.Todo; import io.github.todolist.core.service.api.TodoService; import org.springframework.context.ApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.text.MessageFormat; import java.util.Date; import java.util.ResourceBundle; import static io.github.benas.todolist.web.util.Views.ERROR_PAGE; import static io.github.benas.todolist.web.util.Views.UPDATE_TODO_PAGE; /** * Servlet that controls todo update. * * @author Mahmoud Ben Hassine (mahmoud@benhassine.fr) */ @WebServlet(name = "UpdateTodoServlet", urlPatterns = { "/todos/update", "/todos/update.do" }) public class UpdateTodoServlet extends HttpServlet { private TodoService todoService; private ResourceBundle resourceBundle; @Override public void init(ServletConfig servletConfig) throws ServletException { ApplicationContext applicationContext = WebApplicationContextUtils .getWebApplicationContext(servletConfig.getServletContext()); todoService = applicationContext.getBean(TodoService.class); resourceBundle = ResourceBundle.getBundle("todolist"); } @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { final String id = request.getParameter("todoId"); try { long todoId = Long.parseLong(id); Todo todo = todoService.getTodoById(todoId); // FIXME security : may provide an id for a todo of another user! request.setAttribute("todo", todo); request.getRequestDispatcher(UPDATE_TODO_PAGE).forward(request, response); } catch (NumberFormatException e) { request.setAttribute("error", MessageFormat.format(resourceBundle.getString("no.such.todo"), id)); request.getRequestDispatcher(ERROR_PAGE).forward(request, response); } } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { long todoId = Long.parseLong(request.getParameter("todoId")); String title = request.getParameter("title"); String dueDate = request.getParameter("dueDate"); String priority = request.getParameter("priority"); String status = request.getParameter("status"); Todo todo = todoService.getTodoById(todoId); todo.setTitle(title); todo.setDueDate(new Date(dueDate)); todo.setDone(Boolean.valueOf(status)); todo.setPriority(Priority.valueOf(priority)); todoService.update(todo); request.getRequestDispatcher("/todos").forward(request, response); } }