jpa+maven+hibernate4环境搭建

1.pom.xml

<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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>

<groupId>com.jin.jpa</groupId>
<artifactId>jpamaven</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>jpamaven</name>
<url>http://maven.apache.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.hibernate.version>4.1.7.Final</project.hibernate.version>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${project.hibernate.version}</version>
</dependency>

<!-- connection pooling with c3p0 -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>${project.hibernate.version}</version>
</dependency>

<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>

<!-- Mysql and MariaDB -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>

</dependencies>
</project>

2.在src/main/resources目录下包含两个文件

2.1 src/main/resources/META-INF/persistence.xml

<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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>

<groupId>com.jin.jpa</groupId>
<artifactId>jpamaven</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>jpamaven</name>
<url>http://maven.apache.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.hibernate.version>4.1.7.Final</project.hibernate.version>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${project.hibernate.version}</version>
</dependency>

<!-- connection pooling with c3p0 -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>${project.hibernate.version}</version>
</dependency>

<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>

<!-- Mysql and MariaDB -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>

</dependencies>
</project>

2.2 src/main/resources/log4j.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!-- /* * Copyright (C) 2012 Daniel Medina <http://danielme.com> * * This
file is part of "MavenJpaHibernateLog4jDemo". * * "MavenJpaHibernateLog4jDemo"
is free software: you can redistribute it and/or modify * it under the terms
of the GNU General Public License as published by * the Free Software Foundation,
version 3. * * "MavenJpaHibernateLog4jDemo" is distributed in the hope that
it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty
of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General
Public License for more details. * * You should have received a copy of the
GNU General Public License version 3 * along with this program. If not, see
<http://www.gnu.org/licenses/gpl-3.0.html/> */ -->
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<!-- http://wiki.apache.org/logging-log4j/Log4jXmlFormat -->

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.out" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{ABSOLUTE} %5p %c{1}:%L - %m%n" />
</layout>
</appender>

<appender name="file" class="org.apache.log4j.RollingFileAppender">
<param name="file" value="logs/logger.log" />
<param name="MaxFileSize" value="5MB" />
<param name="MaxBackupIndex" value="10" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{MM-dd-yyyy hh:mm:ss,SSS a} %5p %c{1}:%L - %m%n" />
</layout>

</appender>

<root>
<priority value="debug" />
<appender-ref ref="console" />
<appender-ref ref="file" />
</root>

</log4j:configuration>

3.写一个bean来测试这个环境

src/main/java/com/jin/beans/Person.java

public class PersonTest {

@Test
public void save() {
EntityManagerFactory factory = Persistence.createEntityManagerFactory("persistence-unit_demo");
EntityManager manager = factory.createEntityManager();
manager.getTransaction().begin();
manager.persist(new Person("小天天"));
manager.getTransaction().commit();
manager.close();
factory.close();
}

}

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代码结构图：