JPA整合spring

快来打我* 2022-05-20 09:10 181阅读 0赞

这里使用hibernate支持JPA，首先说依赖

依赖可以分为hibernate、spring、mysql

hibernate：这里除了要导入hibernate的jar包之外还需要导入hibernate与JPA相关的jar包

需要链接数据库，所以需要导hibernate-c3p0及其依赖的jar包

spring：直接导入spring的所有jar包

mysql：mysqjar包

**下面是我的pom.xml文件**

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    	<modelVersion>4.0.0</modelVersion>
    	<parent>
    		<groupId>com.jpa.study</groupId>
    		<artifactId>jpaParent</artifactId>
    		<version>0.0.1-SNAPSHOT</version>
    	</parent>
    	<artifactId>jpa-2</artifactId>
    	<packaging>jar</packaging>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.hibernate</groupId>
    			<artifactId>hibernate-core</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>org.hibernate</groupId>
    			<artifactId>hibernate-entitymanager</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-webmvc</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-jdbc</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-orm</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>mysql</groupId>
    			<artifactId>mysql-connector-java</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>org.hibernate</groupId>
    			<artifactId>hibernate-c3p0</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>joda-time</groupId>
    			<artifactId>joda-time</artifactId>
    		</dependency>
    	</dependencies>
    
    </project>

**接下来是spring的配置文件**

<?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: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-4.3.xsd
    		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    
    	<context:property-placeholder location="classpath:db.properties"/>
    	<context:component-scan base-package="com.jpa"></context:component-scan>
    	
    	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    		<property name="user" value="${jdbc.user}"></property>
    		<property name="password" value="${jdbc.password}"></property>
    		<property name="driverClass" value="${jdbc.driverClass}"></property>
    		<property name="jdbcUrl" value="${jdbc.url}"></property>
    	</bean>
    
    	<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"></bean>
    		</property>
    		
    		<property name="packagesToScan" value="com.jpa.entities"></property>
    		
    		<property name="jpaProperties">
    			<props>
    				<prop key="hibernate.show_sql">true</prop>
    				<prop key="hibernate.format_sql">true</prop>
    				<prop key="hibernate.hbm2ddl.auto">update</prop>
    			</props>
    		</property>
    		
    	</bean>
    
    	
    	<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    		<property name="entityManagerFactory"  ref="entityManagerFactory"></property>
    	</bean>
    	
    	
    	<tx:annotation-driven transaction-manager="transactionManager"/>
    
    </beans>