本篇是针对上一篇《spring整合jpa》文章进行优化

1.1.  使用接口代替dao层

1.1.1.   删除IpersonDao和PersonDaoImpl

1.1.2.   新建PersonDao.java

PersonDao.java

package com.morris.dao;
 
import org.springframework.data.repository.Repository;
 
import com.morris.entity.Person;
 
public interface PersonDao extends Repository<Person, Integer>{
 
  
   void save(Person person);
  
}

1.1.3.   测试结果

后台打印sql语句：

Hibernate: insert into Person (age, name) values (?, ?)

1.2.  去除persistence.xml

1.2.1.   删除META-INF和persistence.xml文件

1.2.2.   配置spring.xml

spring.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"
xmlns:p="http://www.springframework.org/schema/p"xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
 
xsi:schemaLocation="http://www.springframework.org/schema/beans  
          http://www.springframework.org/schema/beans/spring-beans-3.1.xsd   
          http://www.springframework.org/schema/context  
          http://www.springframework.org/schema/context/spring-context-3.1.xsd  
          http://www.springframework.org/schema/aop  
          http://www.springframework.org/schema/aop/spring-aop-3.1.xsd  
          http://www.springframework.org/schema/tx   
          http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
          http://www.springframework.org/schema/cache
          http://www.springframework.org/schema/cache/spring-cache-3.1.xsd
          http://www.springframework.org/schema/data/jpa
          http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">
 
 
<!-- 数据源 -->
<bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/mysql" />
<property name="username" value="root" />
<property name="password" value="root" />
<property name="initialSize" value="5" />
<property name="minIdle" value="5" />
<property name="maxIdle" value="30" />
<property name="maxActive" value="100" />
<property name="maxWait" value="1000" />
</bean>
 
<!-- 实体管理工厂 -->
<bean id="entityManagerFactory" name="mysql"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.morris.entity" />
<property name="jpaDialect">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
</property>
<property name="persistenceProvider">
<bean class="org.hibernate.jpa.HibernatePersistenceProvider" />
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.max_fetch_depth">3</prop>
<prop key="hibernate.jdbc.fetch_size">18</prop>
<prop key="hibernate.jdbc.batch_size">10</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
 
 
 
 
<!-- 定义扫描根路径，不使用默认的扫描方式 -->
<context:component-scan base-package="com.morris"
use-default-filters="false">
<!-- 扫描符合@Service @Repository的类 -->
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Service" />
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Repository" />
</context:component-scan>
 
 
<tx:annotation-driven transaction-manager="transactionManager" />
 
 
<bean id="transactionManager"class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
 
 
 
<jpa:repositories base-package="com.morris.dao"
entity-manager-factory-ref="entityManagerFactory"
transaction-manager-ref="transactionManager" />
</beans>

1.2.3.   测试结果

TestPerson运行后台打印sql：

Hibernate: insert into Person (age, name) values (?, ?)