Spring整合HibernateJPA
JPA: 由Sun公司提供了一对对于持久层操作的标准(接口+文档)
Hibernate: 是Gavin King开发的一套对于持久层操作的自动的ORM框架。
Hibernate JPA: 是在Hibernate3.2 版本那种提供了对于JPA的标准的实现。提供了一套按照JPA标准来实现持久层开发的API。
创建项目
copy上一个项目
在项目中导入HibernateJPA相关Jar包
导入一个新的jar包
选中Jar包右键——>Build Path——>Add to Build Path
修改配置文件
applicationContext.xml
<?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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 配置读取properties文件的工具类 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 配置c3p0数据库连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="driverClass" value="${jdbc.driver.class}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- Spring 整合 JPA 配置EntityManagerFactory-->
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<!-- hibernate相关的属性的注入 -->
<!-- 配置数据库类型 -->
<property name="database" value="MYSQL"/>
<!-- 正向工程 自动创建表 -->
<property name="generateDdl" value="true"/>
<!-- 显示执行的SQL -->
<property name="showSql" value="true"/>
</bean>
</property>
<!-- 扫描实体的包 -->
<property name="packagesToScan">
<list>
<value>com.bjsxt.pojo</value>
</list>
</property>
</bean>
<!-- 配置Hibernate的事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<!-- 配置开启注解事务处理 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
<!-- 配置springIOC的注解扫描 -->
<context:component-scan base-package="com.bjsxt"/>
</beans>
Hibernate JPA 的CRUD操作
添加用户
package com.bjsxt.dao.impl;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import org.hibernate.hql.internal.ast.tree.RestrictableStatement;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import com.bjsxt.dao.UsersDao;
import com.bjsxt.pojo.Users;
@Repository
public class UserDaoImpl implements UsersDao{
@PersistenceContext(name="entityManagerFactory")
private EntityManager entityManager;
/**
* JPA 新增
*/
@Override
public void insertUsers(Users users) {
entityManager.persist(users);
}
@Override
public void updateUsers(Users users) {
}
@Override
public void deleteUsers(Users users) {
}
@Override
public Users selectUsersById(Integer userid) {
return null;
}
@Override
public List<Users> selectUserByName(String username) {
return null;
}
@Override
public List<Users> selectUserByNameUseSQL(String username) {
return null;
}
@Override
public List<Users> selectUserByNameUseCriteria(String username) {
return null;
}
}
/**
* 添加用户
*/
@Test
@Transactional//如果在测试类中对于事务提交方式默认的是回滚。
@Rollback(false) //把默认的回滚改为false
public void testInsertUsers() {
Users users = new Users();
users.setUserage(24);
users.setUsername("张佳琪");
this.usersDao.insertUsers(users);
}
成功
更新用户
package com.bjsxt.dao.impl;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import org.hibernate.hql.internal.ast.tree.RestrictableStatement;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import com.bjsxt.dao.UsersDao;
import com.bjsxt.pojo.Users;
@Repository
public class UserDaoImpl implements UsersDao{
@PersistenceContext(name="entityManagerFactory")
private EntityManager entityManager;
/**
* JPA 新增
*/
@Override
public void insertUsers(Users users) {
entityManager.persist(users);
}
/**
* JPA 更新
*/
@Override
public void updateUsers(Users users) {
entityManager.merge(users);
}
@Override
public void deleteUsers(Users users) {
}
@Override
public Users selectUsersById(Integer userid) {
return null;
}
@Override
public List<Users> selectUserByName(String username) {
return null;
}
@Override
public List<Users> selectUserByNameUseSQL(String username) {
return null;
}
@Override
public List<Users> selectUserByNameUseCriteria(String username) {
return null;
}
}
/**
* 更新用户
*/
@Test
@Transactional//如果在测试类中对于事务提交方式默认的是回滚。
@Rollback(false) //把默认的回滚改为false
public void testUpdateUsers() {
Users users = new Users();
users.setUserid(6);
users.setUserage(18);
users.setUsername("张佳琪");
this.usersDao.updateUsers(users);
}
测试成功
根据id查询
package com.bjsxt.dao.impl;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import org.hibernate.hql.internal.ast.tree.RestrictableStatement;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import com.bjsxt.dao.UsersDao;
import com.bjsxt.pojo.Users;
@Repository
public class UserDaoImpl implements UsersDao{
@PersistenceContext(name="entityManagerFactory")
private EntityManager entityManager;
/**
* JPA 新增
*/
@Override
public void insertUsers(Users users) {
entityManager.persist(users);
}
/**
* JPA 更新
*/
@Override
public void updateUsers(Users users) {
entityManager.merge(users);
}
@Override
public void deleteUsers(Users users) {
}
/**
* JPA 根据userid查询用户
*/
@Override
public Users selectUsersById(Integer userid) {
return this.entityManager.find(Users.class, userid);
}
@Override
public List<Users> selectUserByName(String username) {
return null;
}
@Override
public List<Users> selectUserByNameUseSQL(String username) {
return null;
}
@Override
public List<Users> selectUserByNameUseCriteria(String username) {
return null;
}
}
/**
* 根据userid查询用户
*/
@Test
public void testSelectUsers() {
Users users = this.usersDao.selectUsersById(6);
System.out.println(users);
}
删除操作
package com.bjsxt.dao.impl;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import org.hibernate.hql.internal.ast.tree.RestrictableStatement;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import com.bjsxt.dao.UsersDao;
import com.bjsxt.pojo.Users;
@Repository
public class UserDaoImpl implements UsersDao{
@PersistenceContext(name="entityManagerFactory")
private EntityManager entityManager;
/**
* JPA 新增
*/
@Override
public void insertUsers(Users users) {
entityManager.persist(users);
}
/**
* JPA 更新
*/
@Override
public void updateUsers(Users users) {
entityManager.merge(users);
}
@Override
public void deleteUsers(Users users) {
Users u = this.selectUsersById(users.getUserid());
this.entityManager.remove(u);
}
/**
* JPA 根据userid查询用户
*/
@Override
public Users selectUsersById(Integer userid) {
return this.entityManager.find(Users.class, userid);
}
@Override
public List<Users> selectUserByName(String username) {
return null;
}
@Override
public List<Users> selectUserByNameUseSQL(String username) {
return null;
}
@Override
public List<Users> selectUserByNameUseCriteria(String username) {
return null;
}
}
/**
* 删除用户
*/
@Test
@Transactional//如果在测试类中对于事务提交方式默认的是回滚。
@Rollback(false) //把默认的回滚改为false
public void testDeleteUsers() {
Users users = new Users();
users.setUserid(5);
this.usersDao.deleteUsers(users);
}
Hibernate JPA中的HQL语句
package com.bjsxt.dao.impl;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import org.hibernate.hql.internal.ast.tree.RestrictableStatement;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import com.bjsxt.dao.UsersDao;
import com.bjsxt.pojo.Users;
@Repository
public class UserDaoImpl implements UsersDao{
@PersistenceContext(name="entityManagerFactory")
private EntityManager entityManager;
/**
* JPA 新增
*/
@Override
public void insertUsers(Users users) {
entityManager.persist(users);
}
/**
* JPA 更新
*/
@Override
public void updateUsers(Users users) {
entityManager.merge(users);
}
@Override
public void deleteUsers(Users users) {
Users u = this.selectUsersById(users.getUserid());
this.entityManager.remove(u);
}
/**
* JPA 根据userid查询用户
*/
@Override
public Users selectUsersById(Integer userid) {
return this.entityManager.find(Users.class, userid);
}
/**
* JPA 编写hql
*/
@Override
public List<Users> selectUserByName(String username) {
return this.entityManager.createQuery(" from Users where username = :abc").setParameter("abc", username).getResultList();
}
@Override
public List<Users> selectUserByNameUseSQL(String username) {
return null;
}
@Override
public List<Users> selectUserByNameUseCriteria(String username) {
return null;
}
}
/**
* HQL测试
*/
@Test
@Transactional
public void testSelectUserByName() {
List<Users> list = this.usersDao.selectUserByName("张佳琪");
for(Users u:list) {
System.out.println(u);
}
}
Hibernate JPA中的SQL语句
package com.bjsxt.dao.impl;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import org.hibernate.hql.internal.ast.tree.RestrictableStatement;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import com.bjsxt.dao.UsersDao;
import com.bjsxt.pojo.Users;
@Repository
public class UserDaoImpl implements UsersDao{
@PersistenceContext(name="entityManagerFactory")
private EntityManager entityManager;
/**
* JPA 新增
*/
@Override
public void insertUsers(Users users) {
entityManager.persist(users);
}
/**
* JPA 更新
*/
@Override
public void updateUsers(Users users) {
entityManager.merge(users);
}
@Override
public void deleteUsers(Users users) {
Users u = this.selectUsersById(users.getUserid());
this.entityManager.remove(u);
}
/**
* JPA 根据userid查询用户
*/
@Override
public Users selectUsersById(Integer userid) {
return this.entityManager.find(Users.class, userid);
}
/**
* JPA 编写hql
*/
@Override
public List<Users> selectUserByName(String username) {
return this.entityManager.createQuery(" from Users where username = :abc").setParameter("abc", username).getResultList();
}
/**
* JPA 编写sql
*/
@Override
public List<Users> selectUserByNameUseSQL(String username) {
//在Hibernate JPA如果通过?的方式来绑定参数,那么他的查数是从1开始的,而Hibernate中是从0开始。
return this.entityManager.createNativeQuery("select * from t_users where username = ?", Users.class).setParameter(1, username).getResultList();
}
@Override
public List<Users> selectUserByNameUseCriteria(String username) {
return null;
}
}
/**
* SQL测试
*/
@Test
@Transactional
public void testSelectUserByNameUseSQL() {
List<Users> list = this.usersDao.selectUserByNameUseSQL("张佳琪");
for(Users u:list) {
System.out.println(u);
}
}
Hibernate JPA中的QBC执行
package com.bjsxt.dao.impl;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import org.hibernate.hql.internal.ast.tree.RestrictableStatement;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;
import com.bjsxt.dao.UsersDao;
import com.bjsxt.pojo.Users;
@Repository
public class UserDaoImpl implements UsersDao{
@PersistenceContext(name="entityManagerFactory")
private EntityManager entityManager;
/**
* JPA 新增
*/
@Override
public void insertUsers(Users users) {
entityManager.persist(users);
}
/**
* JPA 更新
*/
@Override
public void updateUsers(Users users) {
entityManager.merge(users);
}
@Override
public void deleteUsers(Users users) {
Users u = this.selectUsersById(users.getUserid());
this.entityManager.remove(u);
}
/**
* JPA 根据userid查询用户
*/
@Override
public Users selectUsersById(Integer userid) {
return this.entityManager.find(Users.class, userid);
}
/**
* JPA 编写hql
*/
@Override
public List<Users> selectUserByName(String username) {
return this.entityManager.createQuery(" from Users where username = :abc").setParameter("abc", username).getResultList();
}
/**
* JPA 编写sql
*/
@Override
public List<Users> selectUserByNameUseSQL(String username) {
//在Hibernate JPA如果通过?的方式来绑定参数,那么他的查数是从1开始的,而Hibernate中是从0开始。
return this.entityManager.createNativeQuery("select * from t_users where username = ?", Users.class).setParameter(1, username).getResultList();
}
/**
* JPA 中的QBC
*/
@Override
public List<Users> selectUserByNameUseCriteria(String username) {
//CriteriaBuilder对象:创建一个CriteriaQuery,创建查询条件。
CriteriaBuilder criteriaBuilder = this.entityManager.getCriteriaBuilder();
//CriteriaQuery对象:执行查询Criteria对象
//等同于select * from t_users
CriteriaQuery<Users> query = criteriaBuilder.createQuery(Users.class);
//获取要查询的实体类的对象
Root<Users> root = query.from(Users.class);
//封装查询条件
Predicate cate = criteriaBuilder.equal(root.get("username"), username);
//等同于select * from t_users where username = ?
query.where(cate);
//执行查询
TypedQuery<Users> typeQuery = this.entityManager.createQuery(query);
return typeQuery.getResultList();
}
}
/**
* QBC测试
*/
@Test
@Transactional
public void testSelectUserByNameUseCriteria() {
List<Users> list = this.usersDao.selectUserByNameUseCriteria("张佳琪");
for(Users u:list) {
System.out.println(u);
}
}