Maven3路程（五）用Maven创建Hibernate项目

本文将用Maven3、Hibernate3.6、Oracle10g整合，作为例子。

环境清单：

1.Maven3.0.5

2.Hibernate3.6.5 Final

3.JDK1.7.0.11

4.Oracle10g

一.首先创建表BDUSER

create table DBUSER
(
  user_id      NUMBER(5) not null,
  username     VARCHAR2(20),
  created_by   VARCHAR2(20),
  created_date DATE
)

二.用Maven3创建一个web项目，项目名称：maven-hibernate-demo

创建项目参考：Maven3路程（三）用Maven创建第一个web项目(1)

三.添加Hibernate和Oracle依赖，pom.xml如下

Hibernate有些依赖包必须添加

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.lei.demo</groupId>
  <artifactId>maven-hibernate-demo</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>maven-hibernate-demo Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.8.2</version>
      <scope>test</scope>
    </dependency>
    <!-- Oracle Jdbc Driver -->
    <dependency>
        <groupId>com.oracle</groupId>
        <artifactId>ojdbc14</artifactId>
        <version>10.2.0.4.0</version>
    </dependency>
    <!-- Hibernate 配置 -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>3.6.5.Final</version>
    </dependency>
    <dependency>
        <groupId>javassist</groupId>
        <artifactId>javassist</artifactId>
        <version>3.12.0.GA</version>
    </dependency>
    <dependency>
        <groupId>antlr</groupId>
        <artifactId>antlr</artifactId>
        <version>2.7.6</version>
    </dependency>
    <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
        <version>3.1</version>
    </dependency>
    <dependency>
        <groupId>dom4j</groupId>
        <artifactId>dom4j</artifactId>
        <version>1.6.1</version>
    </dependency>
    <dependency>
        <groupId>javax.transaction</groupId>
        <artifactId>jta</artifactId>
        <version>1.1</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.6.1</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate.javax.persistence</groupId>
        <artifactId>hibernate-jpa-2.0-api</artifactId>
        <version>1.0.0.Final</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>maven-hibernate-demo</finalName>
  </build>
</project>

四.创建Hibernate Map文件和Model类

1.创建Dbuser.hbm.xml映射文件

路径src/main/resources/com/sulei/demo下

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 2013-10-22 15:28:34 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
    <class name="com.sulei.demo.Dbuser" table="DBUSER" schema="GZIP_BASE">
        <id name="userId" type="int">
            <column name="USER_ID" precision="5" scale="0" />
            <generator class="assigned" />
        </id>
        <property name="username" type="string">
            <column name="USERNAME" length="20" />
        </property>
        <property name="createdBy" type="string">
            <column name="CREATED_BY" length="20" />
        </property>
        <property name="createdDate" type="date">
            <column name="CREATED_DATE" length="7" />
        </property>
    </class>
</hibernate-mapping>

2. 创建实体类Dbuser

路径src/main/java/com/sulei/demo下

package com.sulei.demo;

// Generated 2013-10-22 15:28:34 by Hibernate Tools 3.4.0.CR1

import java.util.Date;

/**
 * Dbuser generated by hbm2java
 */
public class Dbuser implements java.io.Serializable {

    private int userId;
    private String username;
    private String createdBy;
    private Date createdDate;

    public Dbuser() {
    }

    public Dbuser(int userId) {
        this.userId = userId;
    }

    public Dbuser(int userId, String username, String createdBy,
            Date createdDate) {
        this.userId = userId;
        this.username = username;
        this.createdBy = createdBy;
        this.createdDate = createdDate;
    }

    public int getUserId() {
        return this.userId;
    }

    public void setUserId(int userId) {
        this.userId = userId;
    }

    public String getUsername() {
        return this.username;
    }

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

    public String getCreatedBy() {
        return this.createdBy;
    }

    public void setCreatedBy(String createdBy) {
        this.createdBy = createdBy;
    }

    public Date getCreatedDate() {
        return this.createdDate;
    }

    public void setCreatedDate(Date createdDate) {
        this.createdDate = createdDate;
    }

}

可以用Hibernate Tools反向工程自动声场代码，见以下另一篇文章：

用Hibernate Tools生成Hibernate Mapping映射文件

五.创建Hibernate.cfg.xml

创建Hibernate配置文件 “hibernate.cfg.xml” 把他放在resources目录下： “src/main/resources/hibernate.cfg.xml“填写数据库相关信息。

加入Map文件，“DBUser.hbm.xml“.

hibernate.cfg.xml如下：

<?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">
<hibernate-configuration>
 <session-factory name="">
  <property name="hibernate.connection.driver_class">oracle.jdbc.OracleDriver</property>
  <property name="hibernate.connection.password">password</property>
  <property name="hibernate.connection.url">jdbc:oracle:thin:@databaseip:1521:gzip</property>
  <property name="hibernate.connection.username">gzip_base</property>
  <property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
  <property name="show_sql">true</property>
  <mapping resource="com/sulei/demo/Dbuser.hbm.xml" />
 </session-factory>
</hibernate-configuration>

六.创建Session工场

创建 “HibernateUtil.java” 类管理Hibernate Session。路径：“src/main/java/com/sulei/util/HibernateUtil.java”

package com.sulei.util;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
    
    private static final SessionFactory sessionFactory = buildSessionFactory();
     
    private static SessionFactory buildSessionFactory() {
        try {
            // Create the SessionFactory from hibernate.cfg.xml
            return new Configuration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            // Make sure you log the exception, as it might be swallowed
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }
 
    public static SessionFactory getSessionFactory() {
　　　　 System.out.println("test----1");
        return sessionFactory;
    }
 
    public static void shutdown() {
        // Close caches and connection pools
        getSessionFactory().close();
    }

}

六. 代码测试

创建App.java向表中插入一条记录。

package com.sulei.test;

import java.util.Date;
import org.hibernate.Session;
import com.sulei.util.HibernateUtil;
import com.sulei.demo.Dbuser;

public class App {

    public static void main(String[] args) {
        System.out.println("Maven3 + Hibernate + Oracle10g");
        Session session = HibernateUtil.getSessionFactory().openSession();
 
        session.beginTransaction();
        Dbuser user = new Dbuser();
 
        user.setUserId(100);
        user.setUsername("leioolei");
        user.setCreatedBy("system");
        user.setCreatedDate(new Date());
 
        session.save(user);
        session.getTransaction().commit();
    }
}

项目组织好，目录结构见下图