要使用DataNucleus，必须要添加其jar包，因为其jar包比较多还涉及jar包依赖关系，所以最好是使用maven进行构建。下面是项目依赖：
<!-- JDO API --> <dependency> <groupId>javax.jdo</groupId> <artifactId>jdo-api</artifactId> <version>3.1-rc1</version> </dependency> <!-- mysql数据库驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.18</version> </dependency> <!-- junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.4</version> <scope>test</scope> </dependency> <!-- 下面为DataNucleus所需jar包 --> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-core</artifactId> <version>3.0.0-m4</version> </dependency> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-enhancer</artifactId> <version>3.0.0-m4</version> </dependency> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-api-jdo</artifactId> <version>3.0.0-m4</version> </dependency> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-jdo-query</artifactId> <version>3.0.0-m2</version> </dependency> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-cache</artifactId> <version>3.0.0-m2</version> </dependency> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-rdbms</artifactId> <version>3.0.0-m4</version> </dependency> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-management</artifactId> <version>1.0.2</version> </dependency>
<?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_2_0.xsd" version="2.0">
<!-- 一个配置文件中可以有多个持久化单元(persistence-unit) RESOURCE_LOCAL表示本地事务 -->
<persistence-unit name="xtayfjpk" transaction-type="RESOURCE_LOCAL">
<-- 包含一个Person实体 -->
<class>com.xtayfjpk.jdo.entity.Person</class>
<exclude-unlisted-classes/>
<properties>
<property name="datanucleus.ConnectionDriverName" value="com.mysql.jdbc.Driver"/>
<property name="datanucleus.ConnectionURL" value="jdbc:mysql://127.0.0.1:3306/test"/>
<property name="datanucleus.ConnectionUserName" value="root"/>
<property name="datanucleus.ConnectionPassword" value="******"/>
<property name="datanucleus.autoCreateSchema" value="true"/>
</properties>
</persistence-unit>
</persistence>
<property name="javax.jdo.option.ConnectionDriverName" value="com.mysql.jdbc.Driver"/> <property name="javax.jdo.option.ConnectionURL" value="jdbc:mysql://127.0.0.1:3306/test"/> <property name="javax.jdo.option.ConnectionUserName" value="root"/> <property name="javax.jdo.option.ConnectionPassword" value="******"/>
package com.xtayfjpk.jdo.entity;
import javax.jdo.annotations.Column;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.PrimaryKey;
@PersistenceCapable(table="JDO_PERSON")
public class Person {
@PrimaryKey
@Column(name="P_ID")
//如果ID要自增长请加上@Persistent(valueStrategy=IdGeneratorStrategy.IDENTITY)
private Integer id;
@Column(name="P_NAME")
private String name;
@Column(name="P_AGE")
private int age;
@Column(name="P_EMAIL")
private String email;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "Person [id=" + id + ", name=" + name + ", age=" + age
+ ", email=" + email + "]";
}
}
package com.xtayfjpk.jdo;
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory;
import javax.jdo.Transaction;
import org.junit.Before;
import org.junit.Test;
import com.xtayfjpk.jdo.entity.Person;
/**
* Unit test for JDO.
*/
public class JDOTest {
private static PersistenceManagerFactory pmf = null;
@Before
public void before() {
/*Properties properties = new Properties();
properties.setProperty("javax.jdo.option.ConnectionDriverName","com.mysql.jdbc.Driver");
properties.setProperty("javax.jdo.option.ConnectionURL","jdbc:mysql://127.0.0.1:3306/test");
properties.setProperty("javax.jdo.option.ConnectionUserName","root");
properties.setProperty("javax.jdo.option.ConnectionPassword","xtayfjpk");
properties.setProperty("javax.jdo.option.Optimistic","true");
properties.setProperty("datanucleus.autoCreateSchema","true");*/
//getPersistenceManagerFactory有很多重载的方法，具体请参看API
pmf = JDOHelper.getPersistenceManagerFactory("xtayfjpk");
}
@Test
public void testPersistenceManageFactory() {
System.out.println(pmf);
}
@Test
public void testSave() {
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
Person person = new Person();
person.setId(1);
person.setName("王五");
person.setAge(40);
person.setEmail("wangwu@qq.com");
Person p = pm.makePersistent(person);
tx.commit();
} catch (Exception e) {
e.printStackTrace();
if (tx.isActive()) {
tx.rollback();
}
} finally {
pm.close();
pmf.close();
}
}
}
然后添加DataNucleus支持(add DataNucleus support)，再选择enabel Auto-Ehancement启用自动增强。
DataNucleus之JDO操作例子,布布扣,bubuko.com
原文地址：http://blog.csdn.net/xtayfjpk/article/details/25320499
