休眠时间映射在TIMESTAMP WITH时间00:00:00

Question

考虑代码：

import java.sql.Timestamp; 
import java.text.DateFormat; 
import java.text.SimpleDateFormat; 
import java.util.Calendar; 
import java.util.Date; 

import javax.servlet.ServletException; 

import model.UserModel; 

import org.hibernate.Session; 
import org.hibernate.SessionFactory; 
import org.hibernate.Transaction; 
import org.hibernate.cfg.Configuration; 
import org.hibernate.service.ServiceRegistry; 
import org.hibernate.service.ServiceRegistryBuilder; 


/** 
* This class adds initial values to the DB 
* @author X2 
* 
*/ 
public class InitialRecords { 

    private static SessionFactory sessionFactory; 
    private static ServiceRegistry serviceRegistry; 
    private static final String HIBERNATE_USERS = "usersModel.hbm.xml"; 

    /** 
    * 
    * @param myDabatase 
    * @throws ServletException 
    */ 
    public void insertInitialRecords(ChatDatabase myDabatase) throws ServletException 
    { 
     Session session = null; 
     java.util.Date date= new java.util.Date(); 
     Timestamp stamp = new Timestamp(date.getTime()); // get time & date 
     Timestamp stamp2 = new Timestamp(date.getTime()); // get time & date 
     UserModel user = new UserModel("jackson" , stamp , "Some cool message"); 
     UserModel user2 = new UserModel("yohan" , stamp2 , "Another cool message"); 

     // Setting up HIBERNATE 
     // now use Hibernate to put it in the DB 

     try 
     { 
      Configuration cfg = new Configuration().addResource(HIBERNATE_USERS).configure(); 
      serviceRegistry = new ServiceRegistryBuilder().applySettings(cfg.getProperties()).buildServiceRegistry(); 
      sessionFactory = cfg.buildSessionFactory(serviceRegistry); 

      // now insert the record of the person using Hibernate 

      session = sessionFactory.openSession(); 
      System.out.println("Inserting Person records"); 
      Transaction tx = session.beginTransaction(); 

      // save the persons before hibernating 

      session.save(user); 
      session.save(user2); 

      // execute 
      tx.commit(); 
      System.out.println("Done"); 
      session.close(); 
      sessionFactory.close(); 

     } 

     catch (Exception exp) 
     { 
      System.out.println("Error , here is the description :"); 
      System.out.println(exp.toString()); 
      System.exit(0); // abort the program 
     } 

    } 

} 

的的usermodel类：

package model; 

import java.sql.Timestamp; 

public class UserModel 
{ 

    static private int ctr; 
    private int id; 
    private String username; 
    private Timestamp date; 
    private String message; 

    /** 
    * Ctor 
    * @param username 
    * @param stamp 
    * @param msg 
    */ 
    public UserModel(String username , Timestamp stamp , String msg) 
    { 
     id = ctr + 1; 
     ctr++; 
     this.username = username; 
     this.date = stamp; 
     this.message = msg; 
    } 

    public int getId() { 
     return id; 
    } 

    public void setId(int id) { 
     this.id = id; 
    } 

    public String getUsername() { 
     return username; 
    } 

    public void setUsername(String username) { 
     this.username = username; 
    } 

    public Timestamp getDate() { 
     return date; 
    } 

    public void setDate(Timestamp date) { 
     this.date = date; 
    } 

    public String getMessage() { 
     return message; 
    } 

    public void setMessage(String message) { 
     this.message = message; 
    } 



} 

当我映射记录用户和user2时，Hibernate映射随着时间的00:00:00

如何ç记录我解决了它？

非常感谢

更新：

这里是我创建表：

public void createHibernateTableMessagesUsers() throws SQLException, Exception 
{ 

    // this code assumes that the database "DATABASE_NAME" already exists 
    // so the user must create that database before running the below code !!! 
    try 
    { 
     Class.forName(FORNAME_URL); 
     m_connectionHibernate = DriverManager.getConnection(URL , USERNAME , PASSWORD); 
     m_statementHibernate = m_connectionHibernate.createStatement(); 

     m_statementHibernate.executeQuery("USE " + DATABASE_NAME);  // the name of the DATABASE 
     m_statementHibernate.executeUpdate (
       "CREATE TABLE IF NOT EXISTS "+ MESSAGES_TABLE +" (" 
       + "Username CHAR(40) , Message TEXT , Date TIMESTAMP ," 
         + " id INT AUTO_INCREMENT primary key NOT NULL" + ")"); 
    } 

Answer 1

继@Sotirios Delimanolis评论的，这是该问题的解决方案：

考虑UserModel类的以下hbm映射文件：

<?xml version='1.0'?> 
<!DOCTYPE hibernate-mapping PUBLIC 
"-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 

<!-- name of the package --> 
<hibernate-mapping package="model"> 

<!-- name of the class & name of the table , that we want to translate the class-object to --> 
<class name="UserModel" table="messages_table"> 

<id name="id" type="int" column="Id" > 
<generator class="identity"/> 
</id> 

<property name="username" column="Username" type="string"/> 
<property name="date" column="Date" type="java.sql.Timestamp"/> 
<property name="message" column="Message" type="string"/> 

</class> 
</hibernate-mapping> 

在date的财产中，我没有指定type="java.sql.Timestamp"！相反，我写了'type = Date'。这是造成问题的原因！