使用myeclipse使用hibernate配置

 采用myeclipse开发hibernate，新建一个project，是myeclipse下的j2ee project中的web project，在工程中Add Hibernate Capabilities..。对src根目录下的hibernate.cfg.xml这个文件进行编辑，建立数据库的连接。
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

<session-factory>
 <property name="connection.username">root</property>
 <property name="connection.url">jdbc:mysql://localhost:3306/tibcomonitor</property>
 <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
 <property name="connection.password">111111</property>
 <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
 <property name="myeclipse.connection.profile">conmysql</property>
 <mapping resource="dao/User.hbm.xml" />

</session-factory>

</hibernate-configuration>
在数据库tibcomonitor中存在一个表，建表的语句为：

CREATE TABLE `user` (
  `id` int(11) NOT NULL auto_increment,
  `username` varchar(50) default NULL,
  `password` varchar(20) default NULL,
  `remark` varchar(100) default NULL,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;

在src中新建一个包，dao，在其下新建一个操作这个表的类User.java
package dao;

public class User {

 private int id;
 private String username;
 private String password;
 private String  remark;
 
 public int getId() {
  return id;
 }
 public void setId(int id) {
  this.id = id;
 }
 public String getPassword() {
  return password;
 }
 public void setPassword(String password) {
  this.password = password;
 }
 public String getRemark() {
  return remark;
 }
 public void setRemark(String remark) {
  this.remark = remark;
 }
 public String getUsername() {
  return username;
 }
 public void setUsername(String username) {
  this.username = username;
 }
 
}
在同一个包下(也就是dao中)建立这个表的对应的映射文件

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

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-mapping>
<class name="dao.User" table="user">
<id name="id" column="id" type="int">
<generator class="increment"/>
</id>
<property
 name="username"
 column="username"
 type="string"/>
<property
 name="password"
  column="password"
  type="string" />
<property
 name="remark"
  column="remark"
  type="string" />
</class>

</hibernate-mapping>

这个文件的路径要在hibernate.cfg.xml文件中进行声明，hibernate.cfg.xml文件中的<mapping resource="dao/User.hbm.xml" />这句就是这个映射文件的声明。
下面就可以进行测试：
import org.hibernate.cfg.*;
import org.hibernate.*;
import java.util.*;
import dao.User;
public class TestHib {

 public static SessionFactory sessionFactory;//数据存储源
 static {
        try {
            Configuration config = new Configuration().configure();
            sessionFactory = config.buildSessionFactory();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 /*
     * 将一个customer对象存入database
     * @Customer customer Object
     */
    public void saveUser(User ct) {
        Session session = sessionFactory.openSession();
        Transaction tx = null;
        try {
            tx = session.beginTransaction();
            session.save(ct);
            session.flush();
            tx.commit();
        } catch (Exception e) {
            tx.rollback();
            e.printStackTrace();
        } finally {
            session.close();
        }
    }
  public void delete(int id) {
     Session session = sessionFactory.openSession();
        Transaction tran = session.beginTransaction() ;
        String hql = "Delete FROM User Where id=?" ; //删除这时候使用的也是映射的时候的类，并不是数据库中的表名
        Query q = session.createQuery(hql) ;
        q.setInteger(0, id) ;
        q.executeUpdate() ;
        tran.commit() ;
    }
    public void test()
    {
        User ct = new User();
        //ct.setId(5);
        ct.setUsername("蔺洋");
        ct.setPassword("10007");
        ct.setRemark("我爱你中国");
        this.saveUser(ct);
  this.findAll();
        this.loadUpdate(ct.getId(),"phop");

    }
    /*
     * 查找所有的customer object
     */
    public void findAll() {
        Session session = sessionFactory.openSession();
        Transaction tx = null;
        try {
            tx = session.beginTransaction();
            List user = session.createQuery(
                    "from User").list(); //特别要注意的是:这个from后面的因该是对应的数据库表/的那个操作类而不是数据库中的表的名字
            Iterator it = user.iterator();
            System.out.println("append:"+user.size());
//            while()
            for(int i=0;i<user.size();i++)
            {
//                User c = (User)it.next();
                User c = (User)user.get(i);
                System.out.println("ID:" + c.getId());
                System.out.println("Name:" + c.getUsername());
                System.out.println("Pass:" + c.getPassword());
            }
            tx.commit();
        } catch (Exception e) {
            tx.rollback();
        } finally {
            session.close();
        }

    }
    /*
     * 修改customer Name
     * @name
     */
    public void loadUpdate(int id, String name) {
        Session session = sessionFactory.openSession();
        Transaction tx = null;
        try {
            tx = session.beginTransaction();
            User c = (User) session.load(User.class, id);
            c.setUsername(name);
            tx.commit();

        } catch (Exception e) {
            if (tx != null) {
                tx.rollback();
            }
            e.printStackTrace();

        } finally {
            session.close();
        }

    }
 /**
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  TestHib a=new TestHib();
  a.test();

 }

}