<?xml version="1.0" encoding="utf-8"?>

<persistence xmlns="http://java.sun.com/xml/ns/persistence"

             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence

                   http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"

                version="1.0">



	<persistence-unit name="msg" transaction-type="RESOURCE_LOCAL">

		<provider>org.hibernate.ejb.HibernatePersistence</provider>

		<properties>

		 <property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect"/>   

		  <!-- 建表方式，value值为creat-drop时表示创建应用的时候建表，结束应用的时候表自动删除；

     				值为update表示如果映射元数据不存在则建立表，如果映射元数据存在并新增加了字段则会添加到数据库表中 -->

         <property name="hibernate.hbm2ddl.auto" value="update"/>

          <property name="hibernate.show_sql" value="true"/>

         <property name="hibernate.connection.driver_class" value="oracle.jdbc.OracleDriver"/>

         <property name="hibernate.connection.username" value="....没错...."/>

         <property name="hibernate.connection.password" value=".......没错...."/>

         <property name="hibernate.connection.url" value="jdbc:oracle:thin:@localhost:1521:orcl"/>    

		</properties>

	</persistence-unit>

</persistence>

package com.demo.entity;



import java.io.Serializable;



import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.SequenceGenerator;

import javax.persistence.Table;



@Entity

@Table(name = "User")

public class User implements Serializable {



	/**

	 * 

	 */

	private static final long serialVersionUID = 1L;

	@Id

	@GeneratedValue(strategy = GenerationType.SEQUENCE)

	@SequenceGenerator(name = "ID_sqe")

	private int id;

	@Column(name = "User_name", length = 20, nullable = true)

	private String username;

	@Column(name = "User_pwd", length = 40, nullable = true)

	private String password;

	@Column(name = "User_lev", length = 1, nullable = true)

	private int level=0;//0为普通用户，1管理员



	public User() {}

	public User(int id, String name, String password) {

		this.id = id;

		this.username = name;

		this.password = password;

	}



	public int getId() {

		return id;

	}



	public void setI