hibernate中的查询（一）

1：pojo

package com.hibernate1.entity;


import java.io.Serializable;


public class User implements Serializable {


   private Integer id;
   private String loginName;
   private String loginPwd;
   private String realName;
   private String address;
   private String phone;
   private String email;
   public User() {
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getLoginName() {
return loginName;
}
public void setLoginName(String loginName) {
this.loginName = loginName;
}
public String getLoginPwd() {
return loginPwd;
}
public void setLoginPwd(String loginPwd) {
this.loginPwd = loginPwd;
}
public String getRealName() {
return realName;
}
public void setRealName(String realName) {
this.realName = realName;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "User [id=" + id + ", loginName=" + loginName + ", loginPwd="
+ loginPwd + ", realName=" + realName + ", address=" + address
+ ", phone=" + phone + ", email=" + email + "]";
}


}

  2:hibernate.cfg.xml

<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">


<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://127.0.0.1:3306/mydatabase</property>
<property name="connection.username">root</property>
<property name="connection.password">123456</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<mapping resource="com/hibernate1/entity/User.hbm.xml"/>
</session-factory>
</hibernate-configuration>

  3:user.hbm.xml

<?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">


<hibernate-mapping>
        <!--对象映射文件-->
    <class name="com.hibernate1.entity.User" table="users" catalog="mydatabase">
       <id name="id" type="java.lang.Integer">
            <column name="id"/>
            <!--指定主键的生成方式  -->
            <generator class="native"></generator>
       </id>
       <property name="loginName" type="java.lang.String">
        <column name="login_name" length="20"/>
       </property>
        <property name="loginPwd" type="java.lang.String">
        <column name="login_pwd" length="20"/>
       </property>
        <property name="realName" type="java.lang.String">
        <column name="real_name" length="20"/>
       </property>
        <property name="address" type="java.lang.String">
        <column name="Address"/>
       </property>
        <property name="phone" type="java.lang.String">
        <column name="Phone"/>
       </property>
         <property name="email" type="java.lang.String">
        <column name="Email"/>
       </property>
    </class>
</hibernate-mapping>

  4:test

package com.test;


import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.query.Query;


import com.hibernate1.entity.User;


import java.util.List;
import java.util.Iterator;




public class TestHQL {


public static void main(String[] args) {
new TestHQL().test_HQL1();


}
    public void test_HQL1()
    {
    Configuration configuare = new Configuration().configure();
    SessionFactory sessionFactory = configuare.buildSessionFactory();
Session session = sessionFactory.openSession();
Transaction  transaction = session.beginTransaction();
String hql="from User";
Query query=session.createQuery(hql);
List list=query.list();
Iterator iter=list.iterator();
while(iter.hasNext()){
User user=(User)iter.next();
System.out.println(user);
}
transaction.commit();
// 7:关闭session
session.close();
// 8:关闭sessionFactory
sessionFactory.close();
    }
}