Java Mvc和休眠

我想學習Java，Hibernate和MVC模式。繼各種教程在線我設法映射我的數據庫，我創建了幾個主要的方法來測試它，它的工作原理。此外，我已經創建了幾個使用MVC模式的頁面，並且我能夠在視圖中顯示一些模擬數據。問題是我無法連接兩個。這是我所Java Mvc和休眠

我的觀點看起來這

<%@ include file="/WEB-INF/jsp/include.jsp" %> 
<html> 
    <head> 
     <title>Users</title> 
     <%@ include file="/WEB-INF/jsp/head.jsp" %> 
    </head> 
    <body> 
     <%@ include file="/WEB-INF/jsp/header.jsp" %> 
     <img src="images/rss.png" alt="Rss Feed"/>  
     <%@ include file="/WEB-INF/jsp/menu.jsp" %>  
     <div class="ContainerIntroText"> 
     <img src="images/usersList.png" class="marginL150px" alt="Add New User"/> 
     <br/> 
     <br/> 
     <div class="usersList"> 
      <div class="listHeaders"> 
       <div class="headerBox"> 
        <strong>FirstName</strong> 
       </div> 
       <div class="headerBox"> 
        <strong>LastName</strong> 
       </div> 
       <div class="headerBox"> 
        <strong>Username</strong> 
       </div> 
       <div class="headerAction"> 
        <strong>Edit</strong> 
       </div> 
       <div class="headerAction"> 
        <strong>Delete</strong> 
       </div> 
      </div> 
      <br><br> 
     <c:forEach items="${users}" var="user"> 
      <div class="listElement"> 
       <c:out value="${user.firstName}"/> 
      </div> 
      <div class="listElement"> 
       <c:out value="${user.lastName}"/> 
      </div> 
      <div class="listElement"> 
       <c:out value="${user.username}"/> 
      </div> 
      <div class="listElementAction"> 
       <input type="button" name="Edit" title="Edit" value="Edit"/> 
      </div> 
      <div class="listElementAction"> 
       <input type="image" src="images/delete.png" name="image" alt="Delete" > 
      </div> 
      <br />    
      </c:forEach> 
     </div> 
     </div> 

     <a id="addUser" href="addUser.htm" title="Click to add a new user">&nbsp;</a> 
    </body> 
</html>

我控制器

public class UsersController implements Controller { 

    private UserServiceImplementation userServiceImplementation; 

    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) 
      throws ServletException, IOException {   

     ModelAndView modelAndView = new ModelAndView("users");   

     List<User> users = this.userServiceImplementation.get(); 
     modelAndView.addObject("users", users); 

    return modelAndView; 

    } 
    public UserServiceImplementation getUserServiceImplementation() { 
     return userServiceImplementation; 
    } 

    public void setUserServiceImplementation(UserServiceImplementation userServiceImplementation) { 
     this.userServiceImplementation = userServiceImplementation; 
    } 
}

我的小服務程序定義

<?xml version="1.0" encoding="UTF-8"?> 

<beans xmlns="http://www.springframework.org/schema/beans" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 

    <!-- the application context definition for the springapp DispatcherServlet --> 

    <bean name="/home.htm" class="com.rssFeed.mvc.HomeController"/> 
    <bean name="/rssFeeds.htm" class="com.rssFeed.mvc.RssFeedsController"/> 
    <bean name="/addUser.htm" class="com.rssFeed.mvc.AddUserController"/> 
    <bean name="/users.htm" class="com.rssFeed.mvc.UsersController"> 
     <property name="userServiceImplementation" ref="userServiceImplementation"/> 
    </bean> 

    <bean id="userServiceImplementation" class="com.rssFeed.ServiceImplementation.UserServiceImplementation"> 
     <property name="users"> 
      <list> 
       <ref bean="user1"/> 
       <ref bean="user2"/> 
      </list> 
     </property> 
    </bean> 

    <bean id="user1" class="com.rssFeed.domain.User"> 
     <property name="firstName" value="firstName1"/> 
     <property name="lastName" value="lastName1"/> 
     <property name="username" value="username1"/> 
     <property name="password" value="password1"/> 
    </bean> 

    <bean id="user2" class="com.rssFeed.domain.User"> 
     <property name="firstName" value="firstName2"/> 
     <property name="lastName" value="lastName2"/> 
     <property name="username" value="username2"/> 
     <property name="password" value="password2"/> 
    </bean> 

    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
     <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property> 
     <property name="prefix" value="/WEB-INF/jsp/"></property> 
     <property name="suffix" value=".jsp"></property> 
    </bean> 

</beans>

最後這個類來訪問數據庫

public class HibernateUserDao extends HibernateDaoSupport implements UserDao { 

    public void addUser(User user) { 
     getHibernateTemplate().saveOrUpdate(user); 
    } 

    public List<User> get() { 

     User user1 = new User(); 
     user1.setFirstName("FirstName"); 
     user1.setLastName("LastName"); 
     user1.setUsername("Username"); 
     user1.setPassword("Password"); 

     List<User> users = new LinkedList<User>(); 
     users.add(user1); 
    return users; 
    } 

    public User get(int id) { 
     throw new UnsupportedOperationException("Not supported yet."); 
    } 

    public User get(String username) { 
     return null; 
    } 
}

數據庫連接在該文件中

<?xml version="1.0" encoding="UTF-8"?> 

<beans xmlns="http://www.springframework.org/schema/beans" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans-2.0.xsd"> 

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
     <property name="driverClassName" value="org.hsqldb.jdbcDriver"/> 
     <property name="url" value="jdbc:hsqldb:hsql://localhost/rss"/> 
     <property name="username" value="sa"/> 
     <property name="password" value=""/> 
    </bean> 

    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" > 
     <property name="dataSource" ref="dataSource" /> 
     <property name="mappingResources"> 
      <list> 
       <value>com/rssFeed/domain/User.hbm.xml</value> 
      </list> 
     </property> 
     <property name="hibernateProperties" > 
      <props> 
       <prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect</prop> 
      </props> 
     </property> 
    </bean> 

    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
     <property name="sessionFactory" ref="sessionFactory"/> 
    </bean> 

    <bean id="userDao" class="com.rssFeed.dao.hibernate.HibernateUserDao"> 
     <property name="sessionFactory" ref="sessionFactory"/> 
    </bean>  

</beans>

發生和UserServiceImplementation類看起來像這樣

public class UserServiceImplementation implements UserService { 

    private UserDao userDao; 

    public void setUserDao(UserDao userDao) { 
     this.userDao = userDao; 
    } 

    public void add(User user) throws UserAlreadyExistsException { 

     if (userDao.get(user.getUsername()) != null) { //user already exists 
      throw new UserAlreadyExistsException(); 
     } 
     else{ 
      userDao.addUser(user); 
     } 
    } 

    private static List<User> users; 


    static { 
     User user1 = new User(); 
     user1.setFirstName("FirstName"); 
       user1.setLastName("LastName"); 
       user1.setUsername("my username"); 
       user1.setPassword("my Password"); 

     users = new LinkedList<User>(); 
     users.add(user1); 
    } 

    public User createUser(User u) { 
    User user = new User(); 
    user.setId(users.size() + 1); 
    user.setFirstName(u.getFirstName()); 
     user.setLastName(u.getLastName()); 
     user.setUsername(u.getUsername()); 
     user.setPassword(u.getPassword()); 
     users.add(user); 
    return user; 
    } 

    public List<User> get() { 
     return users; 
    } 

    public void setUsers(List<User> users) { 
     this.users = users; 
    } 

    public User get(int id) { 
     throw new UnsupportedOperationException("Not supported yet."); 
    } 
}

你能幫我解決這個問題，我花了4天的夜晚在這個問題上沒有任何成功

謝謝

來源

2010-05-28 GigaPr

什麼不工作？你能向我們展示UserServiceImplementation的代碼嗎？ – oedo 2010-05-28 23:00:52

抱歉，我忘了它，我想用數據庫中的數據替換servelet定義文件中定義的模擬數據 – GigaPr 2010-05-28 23:04:58

@GigaPr發佈正確的答案，以便別人可以解決他的問題 – ant 2010-05-29 10:41:39

經過一個星期和這個問題的一個星期，我設法解決這個問題。我不確定我提出的解決方案是否正確，但它在這個學習階段對我有用並且足夠好。

這是我做了什麼：

我修改了豆userServiceImplementation如下

<bean id="userServiceImplementation" class="com.rssFeed.ServiceImplementation.UserServiceImplementation"> 
     <property name="userDao" ref="userDao" /> 
    </bean>

現在引用的UserDAO豆

<bean id="userDao" class="com.rssFeed.dao.hibernate.HibernateUserDao"> 
     <property name="sessionFactory" ref="sessionFactory"/> 
    </bean>

控制器保持，而HibernateUserDao相同如下更改：

public class HibernateUserDao extends HibernateDaoSupport implements UserDao { 

    private static final String User = User.class.getName(); 

    public void addUser(User user) { 
     getHibernateTemplate().saveOrUpdate(user); 
    } 

    public void save(User user){ 
     getHibernateTemplate().saveOrUpdate(user); 
    } 

    public List<User> get() { 

     return getHibernateTemplate().find("from " + User); 
    } 

    public User get(int id) { 
     return (User) (getHibernateTemplate().find("from " + User + " where id = " + id).get(0)); 
    } 

    public User get(String username) { 
     return null; 
    } 
}

我希望這會幫助你們！

來源

2010-05-30 10:50:53 GigaPr

如果您有任何問題，會幫助您瞭解有關錯誤的一些信息。

有些東西馬上就打擊我的是你的HTML - 你沒有形式，沒有輸入字段？也許你可以從那裏開始？

來源

2010-06-03 02:04:16 Deian

Pssh，他已經回答了他自己的問題。 – BalusC 2010-06-03 02:10:49

回答

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