Spring2.5整合JPA

在网上找了很多Spring整合JPA的文章，试着去写了很多但没有成功，主要原因可能是jar不正确导致的。花了一些时间自已写了一个小例子，Spring2.5整合JPA（Hibernate实现）。

所需要的Spring2.5的jar包如下：

所需要的JPA的jar包如下：

Spring2.5整合JPA所需要的jar如下：

文件太大javaeye上传不了，上面的jar下载地址：（http://download.csdn.net/source/1933969）

1，配置我们的Spring配置文件beans.xml内空如下：

<?xml  version="1.0" encoding="UTF-8"?>
<beans  xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-2.5.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

    <context:annotation-config  />

    <bean  id="entityManager"
        class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
        <property name="persistenceUnitName" value="mengya"></property>
    </bean>

    <bean  id="JPATranManager"
        class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManager"></property>
    </bean>

    <tx:annotation-driven transaction-manager="JPATranManager" />

    <bean  id="studentDAO"
        class="com.mengya.dao.imple.StudentDAOImple">
    </bean>

    <bean  id="studentSerivce"
        class="com.mengya.service.imple.StudentServiceImple">
        <property name="studao" ref="studentDAO"></property>
    </bean>

</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
		    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           	http://www.springframework.org/schema/context           
           	http://www.springframework.org/schema/context/spring-context-2.5.xsd
           	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           	http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

	<context:annotation-config  />

	<bean id="entityManager"
		class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
		<property name="persistenceUnitName" value="mengya"></property>
	</bean>

	<bean id="JPATranManager"
		class="org.springframework.orm.jpa.JpaTransactionManager">
		<property name="entityManagerFactory" ref="entityManager"></property>
	</bean>

	<tx:annotation-driven transaction-manager="JPATranManager" />

	<bean id="studentDAO"
		class="com.mengya.dao.imple.StudentDAOImple">
	</bean>

	<bean id="studentSerivce"
		class="com.mengya.service.imple.StudentServiceImple">
		<property name="studao" ref="studentDAO"></property>
	</bean>

</beans>

如查以上xml在你的MyEclipse中出显了一个错误提示，请你自手在你的MyEclipse的XML配置中配置http://www.springframework.org/schema/beans/spring-beans-2.5.xsd

2， 配置JPA的persistence.xml（在src/META-INF/persistence.xml中）内空如下：

<?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="mengya" transaction-type="RESOURCE_LOCAL">
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
            <property name="hibernate.hbm2ddl.auto" value="update" />
            <property name="hibernate.connection.driver_class" value="org.gjt.mm.mysql.Driver" />
            <property name="hibernate.connection.username" value="root" />
            <property name="hibernate.connection.password" value="###" />
            <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/mp?useUnicode=true&amp;characterEncoding=gbk" />
        </properties>
    </persistence-unit>
</persistence>

<?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="mengya" transaction-type="RESOURCE_LOCAL">
		<properties>
			<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
			<property name="hibernate.hbm2ddl.auto" value="update" />
			<property name="hibernate.connection.driver_class" value="org.gjt.mm.mysql.Driver" />
			<property name="hibernate.connection.username" value="root" />
			<property name="hibernate.connection.password" value="###" />
			<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/mp?useUnicode=true&amp;characterEncoding=gbk" />
		</properties>
	</persistence-unit>	
</persistence>

3，构建我们的实体Bean如下：

@Entity
public class Student {

    private Integer stu_id;

    private String stu_name;

    private String stu_sex;

    private Integer stu_age;

    private String stu_info;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    public Integer getStu_id() {
        return stu_id;
    }

    public void setStu_id(Integer stu_id) {
        this.stu_id = stu_id;
    }

    @Column(nullable = false)
    public String getStu_name() {
        return stu_name;
    }

    public void setStu_name(String stu_name) {
        this.stu_name = stu_name;
    }

    public Integer getStu_age() {
        return stu_age;
    }

    public void setStu_age(Integer stu_age) {
        this.stu_age = stu_age;
    }

    public String getStu_info() {
        return stu_info;
    }

    public void setStu_info(String stu_info) {
        this.stu_info = stu_info;
    }

    public String getStu_sex() {
        return stu_sex;
    }

    public void setStu_sex(String stu_sex) {
        this.stu_sex = stu_sex;
    }

    @Override
    public int hashCode() {
        final int PRIME = 31;
        int result = 1;
        result = PRIME * result + ((stu_id == null) ? 0 : stu_id.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        final Student other = (Student) obj;
        if (stu_id == null) {
            if (other.stu_id !=  null)
                return false;
        } else if (!stu_id.equals(other.stu_id))
            return false;
        return true;
    }

}

@Entity
public class Student {

	private Integer stu_id;

	private String stu_name;

	private String stu_sex;

	private Integer stu_age;

	private String stu_info;

	@Id
	@GeneratedValue(strategy = GenerationType.AUTO)
	public Integer getStu_id() {
		return stu_id;
	}

	public void setStu_id(Integer stu_id) {
		this.stu_id = stu_id;
	}

	@Column(nullable = false)
	public String getStu_name() {
		return stu_name;
	}

	public void setStu_name(String stu_name) {
		this.stu_name = stu_name;
	}

	public Integer getStu_age() {
		return stu_age;
	}

	public void setStu_age(Integer stu_age) {
		this.stu_age = stu_age;
	}

	public String getStu_info() {
		return stu_info;
	}

	public void setStu_info(String stu_info) {
		this.stu_info = stu_info;
	}

	public String getStu_sex() {
		return stu_sex;
	}

	public void setStu_sex(String stu_sex) {
		this.stu_sex = stu_sex;
	}

	@Override
	public int hashCode() {
		final int PRIME = 31;
		int result = 1;
		result = PRIME * result + ((stu_id == null) ? 0 : stu_id.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		final Student other = (Student) obj;
		if (stu_id == null) {
			if (other.stu_id != null)
				return false;
		} else if (!stu_id.equals(other.stu_id))
			return false;
		return true;
	}

}

4，构建我们的DAO接口及实现：

public interface StudentDao {
    public void save(Student stu);

    public void delete(Integer stu_id);

    public void update(Student stu);

    public Student getStudentByPK(Integer stu_id);

    public List<Student> queryAll();
}

public interface StudentDao {
	public void save(Student stu);

	public void delete(Integer stu_id);

	public void update(Student stu);

	public Student getStudentByPK(Integer stu_id);

	public List<Student> queryAll();
}

public class StudentDAOImple implements StudentDao {
    @PersistenceContext
    EntityManager em;

    public void save(Student stu) {
        em.persist(stu);
    }

    public void delete(Integer stu_id) {
        em.remove(em.getReference(Student.class, stu_id));
    }

    public void update(Student stu) {
        em.merge(stu);
    }

    public Student getStudentByPK(Integer stu_id) {
        return em.find(Student.class, stu_id);
    }

    public List<Student> queryAll() {
        return em.createQuery("select s from Student s").getResultList();
    }

}

public class StudentDAOImple implements StudentDao {
	@PersistenceContext
	EntityManager em;

	public void save(Student stu) {
		em.persist(stu);
	}

	public void delete(Integer stu_id) {
		em.remove(em.getReference(Student.class, stu_id));
	}

	public void update(Student stu) {
		em.merge(stu);
	}

	public Student getStudentByPK(Integer stu_id) {
		return em.find(Student.class, stu_id);
	}

	public List<Student> queryAll() {
		return em.createQuery("select s from Student s").getResultList();
	}

}

5，service的接口及实现：

@Transactional
public interface StudentService {

    public void save(Student stu);

    public void delete(Integer stu_id);

    public void update(Student stu);

    @Transactional(propagation = Propagation.NOT_SUPPORTED, readOnly = true)
    public Student getStudentByPK(Integer stu_id);

    @Transactional(propagation = Propagation.NOT_SUPPORTED, readOnly = true)
    public List<Student> queryAll();

}

@Transactional
public interface StudentService {

	public void save(Student stu);

	public void delete(Integer stu_id);

	public void update(Student stu);

	@Transactional(propagation = Propagation.NOT_SUPPORTED, readOnly = true)
	public Student getStudentByPK(Integer stu_id);

	@Transactional(propagation = Propagation.NOT_SUPPORTED, readOnly = true)
	public List<Student> queryAll();

}

public class StudentServiceImple implements StudentService {

    private StudentDao studao;

    public void delete(Integer stu_id) {
        studao.delete(stu_id);
    }

    public Student getStudentByPK(Integer stu_id) {
        return studao.getStudentByPK(stu_id);
    }

    public List<Student> queryAll() {
        return studao.queryAll();
    }

    public void save(Student stu) {
        studao.save(stu);
    }

    public void update(Student stu) {
        studao.update(stu);
    }

    public void setStudao(StudentDao studao) {
        this.studao = studao;
    }

}

public class StudentServiceImple implements StudentService {
	
	private StudentDao studao;
	
	public void delete(Integer stu_id) {
		studao.delete(stu_id);
	}

	public Student getStudentByPK(Integer stu_id) {
		return studao.getStudentByPK(stu_id);
	}

	public List<Student> queryAll() {
		return studao.queryAll();
	}

	public void save(Student stu) {
		studao.save(stu);
	}

	public void update(Student stu) {
		studao.update(stu);
	}

	public void setStudao(StudentDao studao) {
		this.studao = studao;
	}

}

事务只需@Transactional及可，Spring2.5自动帮我们提供事务，事务配置在我们service中。

6，测试我们的service：

public class StudentServiceTest extends TestCase {

    public void testSave() {
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "beans.xml");
        StudentService stuMght = (StudentService) context
                .getBean("studentSerivce");
        Student stu = new Student();
        stu.setStu_name("xiaobo");
        stu.setStu_age(22);
        stu.setStu_sex("男");
        stu.setStu_info("C++");
        stuMght.save(stu);
        System.out.println(stu);
    }

    public void testDelete() {
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "beans.xml");
        StudentService stuMght = (StudentService) context
                .getBean("studentSerivce");
        stuMght.delete(3);
    }

    public void testUpdate() {
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "beans.xml");
        StudentService stuMght = (StudentService) context
                .getBean("studentSerivce");
        Student stu = stuMght.getStudentByPK(4);
        stu.setStu_age(23);
        stuMght.update(stu);
    }

    public void testGetStudentByPK() {
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "beans.xml");
        StudentService stuMght = (StudentService) context
                .getBean("studentSerivce");
        Student stu = stuMght.getStudentByPK(5);
        System.out.println(stu);
    }

    public void testQueryAll() {
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "beans.xml");
        StudentService stuMght = (StudentService) context
                .getBean("studentSerivce");
        List<Student> stuList = stuMght.queryAll();
        for (Student stu : stuList) {
            System.out.println(stu);
        }
    }

}