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Spring2.5整合JPA

發布時間：2024/9/27 javascript 23 豆豆

生活随笔收集整理的這篇文章主要介紹了 Spring2.5整合JPA 小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

在網上找了很多Spring整合JPA的文章，試著去寫了很多但沒有成功，主要原因可能是jar不正確導致的。花了一些時間自已寫了一個小例子，Spring2.5整合JPA（Hibernate實現）。

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上傳不了，上面的jar下載地址：（http://download.csdn.net/source/1933969）

1，配置我們的Spring配置文件beans.xml內空如下：

Xml代碼

<?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/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://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中出顯了一個錯誤提示，請你自手在你的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）內空如下：

Xml代碼

<?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&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&characterEncoding=gbk" /></properties></persistence-unit> </persistence>

3，構建我們的實體Bean如下：

Java代碼

@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;}@Overridepublic int hashCode() {final int PRIME = 31;int result = 1;result = PRIME * result + ((stu_id == null) ? 0 : stu_id.hashCode());return result;}@Overridepublic 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，構建我們的DAO接口及實現：

Java代碼

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(); }

Java代碼

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 {@PersistenceContextEntityManager 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的接口及實現：

Java代碼

@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();}

Java代碼

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;}}

事務只需@Transactional及可，Spring2.5自動幫我們提供事務，事務配置在我們service中。

6，測試我們的service：

Java代碼

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);?

??????? }?

??? }?

總結

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