SpringDataJpa实现增删改查分页
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); } }