2.1 POM文件

  1.   <!--单元测试jar-->
  2.         <dependency>
  3.             <groupId>junit</groupId>
  4.             <artifactId>junit</artifactId>
  5.             <version>4.12</version>
  6.             <scope>test</scope>
  7.         </dependency>
  8.         <!--spring-data-jpa 需要引⼊的jar,start-->
  9.         <dependency>
  10.             <groupId>org.springframework.data</groupId>
  11.             <artifactId>spring-data-jpa</artifactId>
  12.             <version>2.1.8.RELEASE</version>
  13.         </dependency>
  14.         <dependency>
  15.             <groupId>javax.el</groupId>
  16.             <artifactId>javax.el-api</artifactId>
  17.             <version>3.0.1-b04</version>
  18.         </dependency>
  19.         <dependency>
  20.             <groupId>org.glassfish.web</groupId>
  21.             <artifactId>javax.el</artifactId>
  22.             <version>2.2.6</version>
  23.         </dependency>
  24.         <!--spring-data-jpa 需要引⼊的jar,end-->
  25.         <!--spring 相关jar,start-->
  26.         <dependency>
  27.             <groupId>org.springframework</groupId>
  28.             <artifactId>spring-aop</artifactId>
  29.             <version>5.1.12.RELEASE</version>
  30.         </dependency>
  31.         <dependency>
  32.             <groupId>org.aspectj</groupId>
  33.             <artifactId>aspectjweaver</artifactId>
  34.             <version>1.8.13</version>
  35.         </dependency>
  36.         <dependency>
  37.             <groupId>org.springframework</groupId>
  38.             <artifactId>spring-context</artifactId>
  39.             <version>5.1.12.RELEASE</version>
  40.         </dependency>
  41.         <dependency>
  42.             <groupId>org.springframework</groupId>
  43.             <artifactId>spring-context-support</artifactId>
  44.             <version>5.1.12.RELEASE</version>
  45.         </dependency>
  46.         <!--spring对orm框架的⽀持包-->
  47.         <dependency>
  48.             <groupId>org.springframework</groupId>
  49.             <artifactId>spring-orm</artifactId>
  50.             <version>5.1.12.RELEASE</version>
  51.         </dependency>
  52.         <dependency>
  53.             <groupId>org.springframework</groupId>
  54.             <artifactId>spring-beans</artifactId>
  55.             <version>5.1.12.RELEASE</version>
  56.         </dependency>
  57.         <dependency>
  58.             <groupId>org.springframework</groupId>
  59.             <artifactId>spring-core</artifactId>
  60.             <version>5.1.12.RELEASE</version>
  61.         </dependency>
  62.         <!--spring 相关jar,end-->
  63.         <!--hibernate相关jar包,start-->
  64.         <dependency>
  65.             <groupId>org.hibernate</groupId>
  66.             <artifactId>hibernate-core</artifactId>
  67.             <version>5.4.0.Final</version>
  68.         </dependency>
  69.         <!--hibernate对jpa的实现jar-->
  70.         <dependency>
  71.             <groupId>org.hibernate</groupId>
  72.             <artifactId>hibernate-entitymanager</artifactId>
  73.             <version>5.4.0.Final</version>
  74.         </dependency>
  75.         <dependency>
  76.             <groupId>org.hibernate</groupId>
  77.             <artifactId>hibernate-validator</artifactId>
  78.             <version>5.4.0.Final</version>
  79.         </dependency>
  80.         <!--hibernate相关jar包,end-->
  81.         <!--mysql 数据库驱动jar-->
  82.         <dependency>
  83.             <groupId>mysql</groupId>
  84.             <artifactId>mysql-connector-java</artifactId>
  85.             <version>5.1.46</version>
  86.         </dependency>
  87.         <!--druid连接池-->
  88.         <dependency>
  89.             <groupId>com.alibaba</groupId>
  90.             <artifactId>druid</artifactId>
  91.             <version>1.1.21</version>
  92.         </dependency>
  93.         <!--spring-test-->
  94.         <dependency>
  95.             <groupId>org.springframework</groupId>
  96.             <artifactId>spring-test</artifactId>
  97.             <version>5.1.12.RELEASE</version>
  98.         </dependency>

2.2 配置ApplicationContext.xml文件

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3.        xmlns:context="http://www.springframework.org/schema/context"
  4.        xmlns:jpa="http://www.springframework.org/schema/data/jpa"
  5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  6.        xsi:schemaLocation="
  7.  http://www.springframework.org/schema/beans
  8.  https://www.springframework.org/schema/beans/spring-beans.xsd
  9.  http://www.springframework.org/schema/context
  10.  https://www.springframework.org/schema/context/spring-context.xsd
  11.  http://www.springframework.org/schema/data/jpa
  12.  https://www.springframework.org/schema/data/jpa/spring-jpa.xsd
  13. ">
  14.     <!--对spring和springDataJpa进行配置-->
  15.     <!--1. 创建数据库连接池-->
  16.     <context:property-placeholder location="classpath:jdbc.properties"/>
  17.     <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
  18.         <property name="driverClassName" value="${jdbc.driver}"/>
  19.         <property name="url" value="${jdbc.url}"/>
  20.         <property name="username" value="${jdbc.username}"/>
  21.         <property name="password" value="${jdbc.password}"/>
  22.     </bean>
  23.     <!--2. 配置一个JPA非常重要的对象，entityManagerFacotry
  24.     entitymanagerFactory类似于Mybatis中的SQLSessionFactory-->
  25.     <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
  26.         <!--配置一些细节-->
  27.         <!--配置数据源-->
  28.         <property name="dataSource" ref="dataSource"/>
  29.         <!--配置包扫描（pojo实体类所在的包）-->
  30.         <property name="packagesToScan" value="com.myjpa.pojo"/>
  31.         <!--JPA的具体实现，也就是hibernate-->
  32.         <property name="persistenceProvider">
  33.             <bean class="org.hibernate.jpa.HibernatePersistenceProvider"></bean>
  34.         </property>
  35.         <!-- JPA方言配置，不同的jpa实现对于雷士beginTransaction等细节实现起来是不一样的，所以传入JpaDialect具体的实现类-->
  36.         <property name="jpaDialect">
  37.             <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"></bean>
  38.         </property>
  40.         <!--配置具体的provider，hibernate框架的执行细节-->
  41.         <property name="jpaVendorAdapter">
  42.             <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
  43.                 <!--定义Hibernate框架的一些细节-->
  44.                 <!--配置数据库是否自动创建
  45.                 因为我们会建立pojo和数据表之间的映射关系，程序启动时，如果数据表还没有创建，是否要程序给创建一下-->
  46.                 <property name="generateDdl" value="false"/>
  47.                 <!--指定数据库类型，hibernate本身是一个dao层框架，可以支持多种数据库类型的，这里就指定本次使用的什么数据库-->
  48.                 <property name="database" value="MYSQL"/>
  49.                 <!--配置数据库的方言，hibernate可以帮助我们拼接sql语句，但是不同的数据库sql语法是不同的，所以需要
  50.                 我们注入具体的数据库方言-->
  51.                 <property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
  52.                 <!--是否显示sql-->
  53.                 <property name="showSql" value="true" />
  54.             </bean>
  55.         </property>
  56.     </bean>
  57.     <!--3. 引用上面创建的entityMangerFacotry
  58.      <jpa:repositories> 配置jpa的dao细节；base-package指定dao层接口所在的包
  59.     -->
  60.     <jpa:repositories base-package="com.myjpa.dao" entity-manager-factory-ref="entityManagerFactory"
  61.                       transaction-manager-ref="" />
  62.     <!--4. 配置事务管理器
  63.         jdbcTemplate/mybatis 使用的是DataSourceTransaction
  64.         jpa规范：JpaTransactionManger
  65.     -->
  66.     <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
  67.         <property name="entityManagerFactory" ref="entityManagerFactory"/>
  68.     </bean>
  69.     <!--5. 声明式事务配置
  70.      <tx:annotation-drivern />
  71.     -->
  73.     <!--6. 配置spring包扫描-->
  74.     <context:component-scan base-package="com.myjpa" />
  76. </beans>

2.3 Jdbc文件-jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/jpa?characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456