一、引入依赖

<properties>

        <spring.version>4.2.4.RELEASE</spring.version>

        <hibernate.version>5.0.7.Final</hibernate.version>

        <slf4j.version>1.6.6</slf4j.version>

        <log4j.version>1.2.12</log4j.version>

        <c3p0.version>0.9.1.2</c3p0.version>

        <mysql.version>5.1.6</mysql.version>

        <maven.compiler.source>1.8</maven.compiler.source>

        <maven.compiler.target>1.8</maven.compiler.target>

    </properties>

    <dependencies>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>4.12</version>

            <scope>test</scope>

        </dependency>

        <!--spring start-->

        <dependency>

            <groupId>org.aspectj</groupId>

            <artifactId>aspectjweaver</artifactId>

            <version>1.6.8</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-aop</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context-support</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-orm</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-beans</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-core</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <!--spring end-->

        <!--hibernate start-->

        <dependency>

            <groupId>org.hibernate</groupId>

            <artifactId>hibernate-core</artifactId>

            <version>${hibernate.version}</version>

        </dependency>

        <dependency>

            <groupId>org.hibernate</groupId>

            <artifactId>hibernate-entitymanager</artifactId>

            <version>${hibernate.version}</version>

        </dependency>

        <dependency>

            <groupId>org.hibernate</groupId>

            <artifactId>hibernate-validator</artifactId>

            <version>5.2.1.Final</version>

        </dependency>

        <!--hibernate end-->

        <dependency>

            <groupId>c3p0</groupId>

            <artifactId>c3p0</artifactId>

            <version>${c3p0.version}</version>

        </dependency>

        <dependency>

            <groupId>log4j</groupId>

            <artifactId>log4j</artifactId>

            <version>${log4j.version}</version>

        </dependency>

        <dependency>

            <groupId>org.slf4j</groupId>

            <artifactId>slf4j-api</artifactId>

            <version>${slf4j.version}</version>

        </dependency>

        <dependency>

            <groupId>org.slf4j</groupId>

            <artifactId>slf4j-log4j12</artifactId>

            <version>${slf4j.version}</version>

        </dependency>

        <dependency>

            <groupId>mysql</groupId>

            <artifactId>mysql-connector-java</artifactId>

            <version>${mysql.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework.data</groupId>

            <artifactId>spring-data-jpa</artifactId>

            <version>1.9.0.RELEASE</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-test</artifactId>

            <version>4.2.4.RELEASE</version>

        </dependency>

        <dependency>

            <groupId>javax.el</groupId>

            <artifactId>javax.el-api</artifactId>

            <version>2.2.4</version>

        </dependency>

        <dependency>

            <groupId>org.glassfish.web</groupId>

            <artifactId>javax.el</artifactId>

            <version>2.2.4</version>

        </dependency>

    </dependencies>

　　

二、编写配置文件

<?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:aop="http://www.springframework.org/schema/aop"

       xmlns:context="http://www.springframework.org/schema/context"

       xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx"

       xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:task="http://www.springframework.org/schema/task"

       xsi:schemaLocation="

http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd

http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd

http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd

http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd

http://www.springframework.org/schema/data/jpa

http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">

   <!--1 dataSource-->

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

        <property name="driverClass" value="com.mysql.jdbc.Driver"/>

        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/springdata?characterEncoding=utf-8"/>

        <property name="user" value="root"/>

        <property name="password" value="169695"/>

    </bean>

    <!--2 工厂类对象-->

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">

        <!--数据源-->

        <property name="dataSource" ref="dataSource"/>

        <property name="packagesToScan" value="cn.zrf.jpa.entity"/>

        <!--配置供应商适配器-->

        <property name="jpaVendorAdapter">

            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">

                <property name="showSql" value="true"/>

                <property name="generateDdl" value="true"/>

                <!--是否向控制台输出语句 update hibernate.hbm2ddl.auto-->

                <property name="database" value="MYSQL"/>

            </bean>

        </property>

    </bean>

    <!--配置事物-->

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">

        <property name="entityManagerFactory" ref="entityManagerFactory"/>

    </bean>

    <tx:advice id="txAdvice" transaction-manager="transactionManager">

        <tx:attributes>

            <tx:method name="save*" propagation="REQUIRED"/>

            <tx:method name="insert*" propagation="REQUIRED"/>

            <tx:method name="update*" propagation="REQUIRED"/>

            <tx:method name="delete*" propagation="REQUIRED"/>

            <tx:method name="get*" read-only="true"/>

            <tx:method name="find*" read-only="true"/>

            <tx:method name="*" propagation="REQUIRED"></tx:method>

        </tx:attributes>

    </tx:advice>

    <aop:config>

        <aop:pointcut id="pointcut" expression="execution(* cn.zrf.jpa.service.*.*(..))"/>

        <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>

    </aop:config>

    <!--dao-->

    <jpa:repositories base-package="cn.zrf.jpa.dao"

                        transaction-manager-ref="transactionManager"

                        entity-manager-factory-ref="entityManagerFactory"/>

</beans>

　　

三、编写实体类

四、编写dao，继承JpaRepository<Customer,Long>

public interface CustomerDao extends JpaRepository<Customer,Long> {

}

　　

五、测试文件

package cn.zrf.jpa;

import cn.zrf.jpa.dao.CustomerDao;

import cn.zrf.jpa.entity.Customer;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.data.domain.Page;

import org.springframework.data.domain.PageRequest;

import org.springframework.data.domain.Sort;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration("classpath:applicationContext.xml")

public class TestJpa {

    @Autowired

    CustomerDao customerDao;

    //添加

    @Test

    public void add(){

        for (int i=0;i<10;i++){

            Customer customer = new Customer();

            customer.setCustAddress("北京"+i+"号院");

            customer.setCustName("校长"+i+"号");

            customer.setCustLevel("VIP");

            customerDao.save(customer);

        }

    }

    //删除

    @Test

    public void del(){

        customerDao.delete(2l);

    }

    //更新

    @Test

    public void update(){

        Customer customer = new Customer();

        customer.setCustId(10l);

        customer.setCustAddress("天安门");

        customer.setCustName("张三");

        customer.setCustLevel("一日游");

        customerDao.save(customer);

    }

    //根据ID查询一条

    @Test

    public void findById(){

        Customer one = customerDao.findOne(10l);

        System.out.println(one);

    }

    @Test

    @Transactional// 加上事物注解   在方法执行结束之前   连接不会断

    public  void testGetOne(){

        Customer one = customerDao.getOne(1l);

        System.out.println("-----------------------");

        System.out.println(one);

    }

    //查询所有

    @Test

    public void testFindAll(){

        List<Customer> customerDaoAll = customerDao.findAll();

        for(Customer customer:customerDaoAll){

            System.out.println(customer);

        }

    }

    //分页查询

    @Test

    public void findPage(){

        PageRequest pageRequest = new PageRequest(0, 2);

        Page<Customer> page = customerDao.findAll(pageRequest);

        long totalElements = page.getTotalElements();

        System.out.println("总记录数"+totalElements);

        int totalPages = page.getTotalPages();

        System.out.println("总页码数"+totalPages);

        List<Customer> content = page.getContent();

        for (Customer customer:content){

            System.out.println(customer);

        }

    }

    //查询所有待排序

    @Test

    public void findAllWithSort(){

        //创建一个Sort对象

        //参数1、排序方式  参数2、排序的字段，对应实体类的属性名

        Sort custId = new Sort(Sort.Direction.DESC, "custId");

        List<Customer> list = customerDao.findAll(custId);

        for (Customer customer:list){

            System.out.println(customer);

        }

    }

    //统计数据

    @Test

    public void testCount(){

        long count = customerDao.count();

        System.out.println(count);

    }

    //判断查询数据是否存在

    @Test

    public void testExists(){

        boolean exists = customerDao.exists(2l);

        System.out.println(exists);

    }

}

　　

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