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

            <hibernate-configuration>
             <session-factory>
                  <property name="hibernate.connection.url ">jdbc:mysql:///localhost/hibernate_first</property>
                  <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
                  <property name="hibernate.connection.username">root</property>
                  <property name="hibernate.connection.password">root</property>
                  <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
  
                  <mapping resource="com/test/hibernate/User.hbm.xml"/>
             </session-factory>
        </hibernate-configuration>

实体类User的映射文件配置：
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
 "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
 <class name="com.test.hibernate.User">
  <id name="id">
   <generator class="uuid"/>
  </id>
  
  <property name="userName"/>
  <property name="password"/>
  <property name="createDate"/>
  <property name="expireDate"/>
 </class>
 
</hibernate-mapping>

下面是连接数据库的类：

package com.test.hibernate;

import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class ExportDB {

 public static void main(String[] args) {
  
  Configuration cfg = new Configuration().configure();
  
  SchemaExport export = new SchemaExport(cfg);
  
  export.create(true, true);
 }

}

<taglib>
    <taglib-uri>http://java.sun.com/jstl/core-rt</taglib-uri>
    <taglib-location>/WEB-INF/tlds/c-rt.tld</taglib-location>
</taglib>

........................
</web-app>

4.可以用Arrays.asList( )方法把数组改造成List：实际上它只是部分地实现了Collection 和List 接口。调用其它方法会引发一个UnsupportedOperationException 异常。Arrays.asList( )返回的是一个由固定容量的数组支撑的List。如果要创建普通容器，随时都可以把Arrays.asList( )的结果当作构造函数的参数传给List 或Set，这样就能使用它的完整接口了。