在Spring框架中集成JPA实例
时间:2011-10-02 百度空间 守护地下铁
Hibernate 3.2支持JPA注解，Spring集成JPA是可选的。
下面是Spring集成JPA的一个例子。
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);
}
}
在Spring框架中集成JPA实例(2)
时间:2011-10-02 百度空间 守护地下铁
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 queryMyUser(String queryString);
public List queryAll();
}
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 db
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