A. 导入坐标

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0"
  3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  5.     <modelVersion>4.0.0</modelVersion>
  7.     <groupId>org.example</groupId>
  8.     <artifactId>LearnSpringDataJpa</artifactId>
  9.     <version>1.0-SNAPSHOT</version>
  11.     <properties>
  12.         <spring.version>5.2.12.RELEASE</spring.version>
  13.         <hibernate.version>5.4.27.Final</hibernate.version>
  14.     </properties>
  16.     <dependencies>
  17.         <dependency>
  18.             <groupId>junit</groupId>
  19.             <artifactId>junit</artifactId>
  20.             <version>4.13.1</version>
  21.         </dependency>
  22.         <dependency>
  23.             <groupId>mysql</groupId>
  24.             <artifactId>mysql-connector-java</artifactId>
  25.             <version>5.1.49</version>
  26.         </dependency>
  28.         <!-- Spring AoP -->
  29.         <dependency>
  30.             <groupId>org.aspectj</groupId>
  31.             <artifactId>aspectjweaver</artifactId>
  32.             <version>1.9.6</version>
  33.         </dependency>
  35.         <dependency>
  36.             <groupId>org.springframework</groupId>
  37.             <artifactId>spring-aop</artifactId>
  38.             <version>${spring.version}</version>
  39.         </dependency>
  41.         <!-- Spring IoC -->
  42.         <dependency>
  43.             <groupId>org.springframework</groupId>
  44.             <artifactId>spring-context</artifactId>
  45.             <version>${spring.version}</version>
  46.         </dependency>
  47.         <dependency>
  48.             <groupId>org.springframework</groupId>
  49.             <artifactId>spring-context-support</artifactId>
  50.             <version>${spring.version}</version>
  51.         </dependency>
  52.         <dependency>
  53.             <groupId>org.springframework</groupId>
  54.             <artifactId>spring-beans</artifactId>
  55.             <version>${spring.version}</version>
  56.         </dependency>
  57.         <dependency>
  58.             <groupId>org.springframework</groupId>
  59.             <artifactId>spring-core</artifactId>
  60.             <version>${spring.version}</version>
  61.         </dependency>
  63.         <!-- Spring ORM -->
  64.         <dependency>
  65.             <groupId>org.springframework</groupId>
  66.             <artifactId>spring-orm</artifactId>
  67.             <version>${spring.version}</version>
  68.         </dependency>
  70.         <!-- Hibernate -->
  71.         <dependency>
  72.             <groupId>org.hibernate</groupId>
  73.             <artifactId>hibernate-core</artifactId>
  74.             <version>${hibernate.version}</version>
  75.         </dependency>
  76.         <dependency>
  77.             <groupId>org.hibernate</groupId>
  78.             <artifactId>hibernate-entitymanager</artifactId>
  79.             <version>${hibernate.version}</version>
  80.         </dependency>
  81.         <dependency>
  82.             <groupId>org.hibernate.validator</groupId>
  83.             <artifactId>hibernate-validator</artifactId>
  84.             <version>6.1.6.Final</version>
  85.         </dependency>
  87.         <!-- c3p0 -->
  88.         <dependency>
  89.             <groupId>com.mchange</groupId>
  90.             <artifactId>c3p0</artifactId>
  91.             <version>0.9.5.5</version>
  92.         </dependency>
  94.         <!-- Spring Data Jpa -->
  95.         <dependency>
  96.             <groupId>org.springframework.data</groupId>
  97.             <artifactId>spring-data-jpa</artifactId>
  98.             <version>2.3.6.RELEASE</version>
  99.         </dependency>
  100.         <dependency>
  101.             <groupId>org.springframework</groupId>
  102.             <artifactId>spring-test</artifactId>
  103.             <version>${spring.version}</version>
  104.         </dependency>
  106.         <!-- el beg 使用 Spring Data Jpa 必须导入的 -->
  107.         <dependency>
  108.             <groupId>javax.el</groupId>
  109.             <artifactId>javax.el-api</artifactId>
  110.             <version>3.0.0</version>
  111.         </dependency>
  112.         <dependency>
  113.             <groupId>org.glassfish</groupId>
  114.             <artifactId>javax.el</artifactId>
  115.             <version>3.0.0</version>
  116.         </dependency>
  118.     </dependencies>
  119. </project>

B. SpringDataJpa 的配置文件 applicationContext.xml:

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
  4.        xmlns:context="http://www.springframework.org/schema/context"
  5.        xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx"
  6.        xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:task="http://www.springframework.org/schema/task"
  7.        xsi:schemaLocation="
  8.         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
  9.         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
  10.         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
  11.         http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
  12.         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
  13.         http://www.springframework.org/schema/data/jpa
  14.         http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">
  16.     <!--spring 和 spring data jpa的配置-->
  18.     <!-- 1.创建entityManagerFactory对象交给spring容器管理-->
  19.     <bean id="entityManagerFactoty" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
  20.         <property name="dataSource" ref="dataSource" />
  21.         <!--配置的扫描的包（实体类所在的包） -->
  22.         <property name="packagesToScan" value="com.example.domain" />
  23.         <!-- jpa的实现厂家 -->
  24.         <property name="persistenceProvider">
  25.             <bean class="org.hibernate.jpa.HibernatePersistenceProvider"/>
  26.         </property>
  28.         <!--jpa的供应商适配器 -->
  29.         <property name="jpaVendorAdapter">
  30.             <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
  31.                 <!--配置是否自动创建数据库表 -->
  32.                 <property name="generateDdl" value="false" />
  33.                 <!--指定数据库类型 -->
  34.                 <property name="database" value="MYSQL" />
  35.                 <!--数据库方言：支持的特有语法  比如 mysql的分页-->
  36.                 <property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
  37.                 <!--是否显示sql -->
  38.                 <property name="showSql" value="true" />
  39.             </bean>
  40.         </property>
  42.         <!--jpa的方言 ：高级的特性 -->
  43.         <property name="jpaDialect" >
  44.             <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
  45.         </property>
  47.     </bean>
  49.     <!--2.创建数据库连接池 -->
  50.     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
  51.         <property name="user" value="root"/>
  52.         <property name="password" value="123456"/>
  53.         <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/jpaTest"/>
  54.         <property name="driverClass" value="com.mysql.jdbc.Driver"/>
  55.     </bean>
  57.     <!--3.整合spring dataJpa-->
  58.     <jpa:repositories base-package="com.example.dao" transaction-manager-ref="transactionManager"
  59.                       entity-manager-factory-ref="entityManagerFactoty"/>
  61.     <!--4.配置事务管理器 -->
  62.     <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
  63.         <property name="entityManagerFactory" ref="entityManagerFactoty"/>
  64.     </bean>
  66.     <!-- 5. 配置包扫描-->
  67.     <context:component-scan base-package="com.example"/>
  68. </beans>

C. 编写实体类，使用 jpa 注解配置映射关系

D. 编写 DAO 层接口