Uczę się Springa + Hibernate i napotkałem na problem, gdyż nie mogę wczytać z bazy danych 2 tabel. Tworzę program na podstawie gotowego przykładu połączenia sprogna z hibernate. Mam mniej więcej coś takiego:
@Configuration
@ComponentScan("net.codejava.spring")
@EnableTransactionManagement
public class ApplicationContextConfig {
@Bean(name = "viewResolver")
public InternalResourceViewResolver getViewResolver() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/views/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
@Bean(name = "dataSource")
public DataSource getDataSource() {
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/mojabaza");
dataSource.setUsername("angolix");
dataSource.setPassword("mama11");
return dataSource;
}
private Properties getHibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.show_sql", "true");
properties.put("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
return properties;
}
@Autowired
@Bean(name = "sessionFactory")
public SessionFactory getSessionFactory(DataSource dataSource) {
LocalSessionFactoryBuilder sessionBuilder = new LocalSessionFactoryBuilder(dataSource);
sessionBuilder.addProperties(getHibernateProperties());
sessionBuilder.addAnnotatedClasses(Transaction.class);
return sessionBuilder.buildSessionFactory();
}
@Autowired
@Bean(name = "transactionManager")
public HibernateTransactionManager getTransactionManager(
SessionFactory sessionFactory) {
HibernateTransactionManager transactionManager = new HibernateTransactionManager(
sessionFactory);
return transactionManager;
}
@Autowired
@Bean(name = "transactionDao")
public TransactionDAO getTransactionDao(SessionFactory sessionFactory) {
return new TransactionDAOImpl(sessionFactory);
}
@Autowired
@Bean(name = "categoryDao")
public CategoryDAO getCategoryDao(SessionFactory sessionFactory) {
return new CategoryDAOImpl(sessionFactory);
}
public class SpringWebAppInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
AnnotationConfigWebApplicationContext appContext = new AnnotationConfigWebApplicationContext();
appContext.register(ApplicationContextConfig.class);
ServletRegistration.Dynamic dispatcher = servletContext.addServlet(
"SpringDispatcher", new DispatcherServlet(appContext));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
}
}
@Controller
public class HomeController {
@Autowired
private TransactionDAO transactionDao;
@Autowired
private CategoryDAO categoryDao;
@RequestMapping("/")
public ModelAndView handleRequest() throws Exception {
List<Transaction> listTransaction = transactionDao.list();
ModelAndView model = new ModelAndView("TransactionList");
model.addObject("transactionList", listTransaction);
return model;
}
@RequestMapping(value = "/category")
public ModelAndView getCategory() throws Exception {
List<Category> listCategory = categoryDao.list();
ModelAndView model = new ModelAndView("CategoryList");
model.addObject("categoryList", listCategory);
return model;
}
Klasy DAO oraz modelu danych są niemal identyczne. Różnią się nazwą tabeli oraz 1 polem. Problem polega na tym, gdy odpalę aplikację i przejdę na "/category", nic się nie wyświetla i nie ma informacji w konsoli o odpytywanie z hibernate. Dodam jeszcze plik widoku klasy która się nie wyświetla:
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>BudgetManager</title>
</head>
<body>
<div align="center">
<h1>Transactions List</h1>
<h2><a href="new">New Transaction</a></h2>
<table border="1">
<th>No</th>
<th>Name</th>
<th>Actions</th>
<c:forEach var="category" items="${categoryList}" varStatus="status">
<tr>
<td>${status.index + 1}</td>
<td>${category.name}</td>
<td>
<a href="delete?id=${category.id}">Delete</a>
</td>
</tr>
</c:forEach>
</table>
</div>
</body>
</html>