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Hibernate 3.2支持JPA注解，Spring集成JPA是可选的。
实体类MyUser，使用JPA注解实现到数据库表myUser的映射，如下所示：
package org.shirdrn.entity; import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Transient; @Entity
public class MyUser {
private Long id; private String userName; private String password; private String gender; private Integer age; private Integer birthYear; private String addr; private String email; @Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Column(name="userName")
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
@Column(name="password")
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Column(name="gender")
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
@Column(name="age")
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Column(name="addr")
public String getAddr() {
return addr;
}
public void setAddr(String addr) {
this.addr = addr;
}
@Column(name="email")
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Transient
public Integer getBirthYear() {
return new Integer(2008-age);
}
public void setBirthYear(Integer age) {
this.birthYear = new Integer(2008-age);
}
}
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其中，birthYear不是数据库中的字段，使用JPA的@Transient注解，在映射的时候，会忽略掉该成员。
持久层DAO接口如下：
package org.shirdrn.dao; import java.util.List; import org.shirdrn.entity.MyUser; import org.springframework.transaction.annotation.Transactional; @Transactional
public interface MyUserDAO {
public void createMyUser(MyUser myUser);
public void deleteMyUser(MyUser myUser);
public void updateMyUser(MyUser myUser);
public List
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这里，使用了JPA注解，声明事务。
DAO实现类，如下所示：
package org.shirdrn.dao.impl; import java.util.List; import org.shirdrn.dao.MyUserDAO; import org.shirdrn.entity.MyUser; import org.springframework.orm.jpa.support.JpaDaoSupport; public class MyUserDAOImpl extends JpaDaoSupport implements MyUserDAO {
public void createMyUser(MyUser myUser) {
getJpaTemplate().persist(myUser);
}
public void deleteMyUser(MyUser myUser) {
MyUser dbMyUser = getJpaTemplate().find(MyUser.class, myUser.getId());
getJpaTemplate().remove(dbMyUser);
}
public void updateMyUser(MyUser myUser) {
MyUser dbMyUser = getJpaTemplate().find(MyUser.class, myUser.getId());
if(myUser.getUserName() != null){
dbMyUser.setUserName(myUser.getUserName());
}
if(myUser.getAddr() != null){
dbMyUser.setAddr(myUser.getAddr());
}
getJpaTemplate().merge(dbMyUser);
}
@SuppressWarnings("unchecked")
public List
@SuppressWarnings("unchecked")
public List
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因为继承了JpaDaoSupport，索引需要获取一个JpaTemplate来实现访问数据库，在Spring的配置文件中要注入一个org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean。
Spring的配置文件applicationContext.xml的内容如下所示：
<BEANSXMLNS="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
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在META-INF目录下，还要加一个persistence.xml配置文件，如下所示：
<PERSISTENCEXMLNS="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">
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接着，对增删改查操作进行测试，如下所示：
插入记录：
packageorg.shirdrn.test; importorg.shirdrn.dao.MyUserDAO; importorg.shirdrn.entity.MyUser; importorg.springframework.context.ApplicationContext; importorg.springframework.context.support.ClassPathXmlApplicationContext; publicclassTestCreateMyUser{
publicstaticvoidmain(String[]args){
MyUserDAOmyUserDAO=(MyUserDAO)ctx.getBean("myUserDAOImpl");
MyUsermyUser=newMyUser();
myUser.setUserName("JohnXa");
myUser.setPassword("123456");
myUser.setGender("男");
myUser.setAge(newInteger(25));
myUser.setAddr("NewYork");
myUser.setEmail("john@hotmail.com");
myUserDAO.createMyUser(myUser);
}
}
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删除记录：
packageorg.shirdrn.test; importorg.shirdrn.dao.MyUserDAO; importorg.shirdrn.entity.MyUser; importorg.springframework.context.ApplicationContext; importorg.springframework.ClassPathXmlApplicationContext; publicclassTestDeleteMyUser{
publicstaticvoidmain(String[]args){
ApplicationContextctx=newClassPathXml("applicationContext.xml");
MyUserDAOmyUserDAO=(MyUserDAO)ctx.getBean("myUserDAOImpl");
MyUsermyUser=newMyUser();
myUser.setId(newLong(29));
myUserDAO.deleteMyUser(myUser);
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修改记录：
packageorg.shirdrn.test; importorg.shirdrn.dao.MyUserDAO; importorg.shirdrn.entity.MyUser; importorg.springframework.context.ApplicationContext; importorg.springframework.context.ClassPathXmlApplicationContext; publicclassTestUpdateMyUser{ |
查询记录：
packageorg.shirdrn.test; importjava.util.List; importorg.shirdrn.dao.MyUserDAO; importorg.shirdrn.entity.MyUser; importorg.springframework.context.ApplicationContext; importorg.springframework.context.ClassPathXmlApplicationContext; publicclassTestQueryAllMyUser{
publicstaticvoidmain(String[]args){
ApplicationContextctx=newClassPathXmContext("applicationContext.xml");
MyUserDAOmyUserDAO=(MyUserDAO)ctx.getBean("myUserDAOImpl");
List
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