休眠不会插入数据库

Question

现在我有一个非常奇怪的问题，我无法理解。

我有休眠正确配置。我可以从我的MySQL数据库加载数据没有任何问题。但我无法插入数据。这是我的hibernate.cfg.xml：

<?xml version='1.0' encoding='utf-8'?> 
<!DOCTYPE hibernate-configuration PUBLIC 
"-//Hibernate/Hibernate Configuration DTD//EN" 
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 

<hibernate-configuration> 
<session-factory> 
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/bookmaker</property> 
<property name="hibernate.connection.username">root</property> 
<property name="hibernate.connection.password">password</property> 
<property name="hibernate.connection.pool_size">10</property> 
<property name="show_sql">true</property> 
<property name="dialect">org.hibernate.dialect.MySQLDialect</property> 
<property name="hibernate.current_session_context_class">thread</property> 
<property name="javax.persistence.validation.mode">none</property> 

<mapping class="de.wettprofi.objects.Bookmaker"/> 
<mapping class="de.wettprofi.objects.Match"/> 
<mapping class="de.wettprofi.objects.LogEntry"/> 

</session-factory> 
</hibernate-configuration> 

这是关于类LogEntry。下面是一些代码，应该persit对象到数据库：

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
    { 
     BufferedReader reader = request.getReader(); 
     String json = reader.readLine(); 

     try { 
      LogEntry log_entry = null; 

      if (json != null && !json.isEmpty()) { 
       log_entry = new LogEntry(); 

       JSONParser parser = new JSONParser(); 
       JSONObject json_dict = (JSONObject) parser.parse(json); 

       //initalize proper LogEntry object 
      } 
      if(log_entry != null) { 
       Session session = get_hibernate_session(); 
       System.out.println("Logging of LogEntry into the database\n" + log_entry.toString()); 
       session.save(log_entry); 
       session.flush(); 
       System.out.println("Logging DONE"); 
      } 

     } catch(Exception e) { 
      e.printStackTrace(); 
     } 
    } 



    public Session get_hibernate_session() 
    { 
     //Opening a hibernate session 
     SessionFactory sessionFactory = null; 
     try { 
      Configuration hibConfiguration = new Configuration().addResource("hibernate.cfg.xml").configure();  
      ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(hibConfiguration.getProperties()).buildServiceRegistry(); 
      sessionFactory = hibConfiguration.buildSessionFactory(serviceRegistry); 
     } catch(Exception e) { 
      e.printStackTrace(); 
     } 

     return sessionFactory.withOptions().openSession(); 
    } 

这是LogEntry类对象是什么样子（省略getter和setter）：

@Entity 
@Table(name = "LogEntries") 
public class LogEntry { 

    public static int MESSAGE = 1; 
    public static int BOOKMAKER = 2; 
    public static int CLICKLOG = 3; 

    @Id 
    @GeneratedValue(strategy=GenerationType.AUTO) 
    @Column(name = "lid") 
    public int lid; 

    @Column(name = "id") 
    public String id; 

    @Column(name = "date") 
    public Date date; 

    @Column(name = "type") 
    public int type; 

    @Column(name = "message") 
    public String message; 

    @Column(name = "bookmaker") 
    public String bookmaker; 

    @Column(name = "match_id") 
    public int match_id; 

    @Column(name = "result") 
    public String result; 


    public String toString() 
    { 
     StringBuffer sb = new StringBuffer(); 
     sb.append("  lid = " + lid + "\n"); 
     sb.append("  id = " + id + "\n"); 
     sb.append("  date = " + date.toString() + "\n"); 
     sb.append("  type = " + type + "\n"); 
     sb.append(" message = " + message + "\n"); 
     sb.append("bookmaker = " + bookmaker + "\n"); 
     sb.append(" match_id = " + match_id + "\n"); 
     sb.append(" result = " + result + "\n"); 
     return sb.toString(); 
    } 

所以，当我现在运行我的Tomcat实例，并且对什么确实发生了，我得到以下输出一看：

INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect 
Apr 24, 2013 9:55:18 PM org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService 
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions) 
Apr 24, 2013 9:55:18 PM org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init> 
INFO: HHH000397: Using ASTQueryTranslatorFactory 
Logging of LogEntry into the database 
     lid = 0 
     id = 50569803719166097161 
    date = Mon Apr 22 21:01:53 CEST 2013 
    type = 1 
    message = MainVC 
bookmaker = null 
match_id = 0 
    result = null 

Hibernate: insert into LogEntries (bookmaker, date, id, match_id, message, result, type) values (?, ?, ?, ?, ?, ?, ?) 
Logging DONE 

后然而，这在看看到我的数据库显示，什么也没有写入表。

这是我的表模式：

mysql> describe LogEntries; 
+-----------+--------------+------+-----+---------+----------------+ 
| Field  | Type   | Null | Key | Default | Extra   | 
+-----------+--------------+------+-----+---------+----------------+ 
| lid  | int(11)  | NO | PRI | NULL | auto_increment | 
| bookmaker | varchar(255) | YES |  | NULL |    | 
| date  | datetime  | YES |  | NULL |    | 
| id  | varchar(255) | YES |  | NULL |    | 
| match_id | int(11)  | YES |  | NULL |    | 
| message | varchar(255) | YES |  | NULL |    | 
| result | varchar(255) | YES |  | NULL |    | 
| type  | int(11)  | YES |  | NULL |    | 
+-----------+--------------+------+-----+---------+----------------+ 
8 rows in set (0.00 sec) 

有没有人有一个想法是什么可能会导致这样的麻烦。我无言以对:(

Answer 1

实体类应该有getter和setter对于

同样的属性。您收到会议结束后，你需要开始您的交易。

http://docs.jboss.org/hibernate/orm/3.5/javadoc/org/hibernate/Session.html

Session sess = factory.openSession(); 
Transaction tx; 
try { 
    tx = sess.beginTransaction(); 
    //do some work 
    ... 
    sess.save(entityObjectToBeinserted); 
    tx.commit(); 
} 
catch (Exception e) { 
    if (tx!=null) tx.rollback(); 
    throw e; 
} 
finally { 
    sess.close(); 
} 

Answer 2

您需要declare get/set pairs每Hibernate文档的每个属性，这些方法可以是公共的，受保护的或私有的，但它们必须存在。