一、简介
(一)需要的jar包
1、需要的jar包:spring、hibernate、mysql、xml、apache-commons等等的jar包。
2、以上jar包,如spring、xml和commos都是冗余的。
(二)分析
1、涉及到的实体、service、dao接口、jdbc配置文件以及service实现类都可以通用,只需要实现不同的dao实现类、配置、测试类。
2、通用的源码如下:
1)实体:
<span style="font-size:18px;">@Entity @Table(name="spring_person") //@Cache(usage=CacheConcurrencyStrategy.READ_WRITE,region="main.java.com.spring.entity.PersonEntity") // region用于设置单独的缓存机制,在ehcache.xml 中定义。 public class PersonEntity { @Id @Column(name="person_id",nullable=true ) @GeneratedValue(strategy=GenerationType.AUTO) private int personId; private String name; public PersonEntity() { } public int getPersonId() { return personId; } public void setPersonId(int personId) { this.personId = personId; } public String getName() { return name; } public void setName(String name) { this.name = name; } } </span>
2)service接口:
<span style="font-size:18px;">/** * 业务接口 * PersonService * @title * @desc * @author SAM-SHO * @Jan 17, 2015 */ public interface PersonService { /** * 保存用户实体 * @param name */ public void save(PersonEntity persionEntity); /** * 删除用户实体 * @param id */ public void delete(int id); /** * 查询编号为id的使用用户姓名 * @param id */ public String queryPersonName(int id); /** * 查询编号为id的用户 * @param id */ public PersonEntity getPerson(int id); /** * 查询所有的PersonEntity * @return */ public List<PersonEntity> getAllPerson(); /** * 更新实体 * @param name * @param id */ public void update(String name ,int id); } </span>
3)service实现类,注入dao的接口。
<span style="font-size:18px;">/** * 业务实现类 * PersionServiceImpl * @title * @desc * @author SAM-SHO * @Jan 17, 2015 */ @Service @Transactional public class PersonServiceImpl implements PersonService { @Resource private PersonDao personDao;//利用接口 @Transactional(readOnly=true,timeout=100,isolation=Isolation.DEFAULT) @Override public void save(PersonEntity persionEntity) { personDao.save(persionEntity); } @Transactional(rollbackFor=Exception.class)//任何异常就回滚 @Override public void delete(int id) { personDao.delete(id); } @Override public String queryPersonName(int id) { return personDao.queryPersonName(id); } @Transactional(noRollbackFor=RuntimeException.class)//运行异常就不会回滚 @Override public void update(String name, int id) { personDao.update(name, id); } public PersonDao getPersonDao() { return personDao; } public void setPersonDao(PersonDao personDao) { this.personDao = personDao; } @Override public PersonEntity getPerson(int id) { return personDao.getPerson(id); } @Override public List<PersonEntity> getAllPerson() { return personDao.getAllPerson(); } } </span>
4)dao接口
<span style="font-size:18px;">/** * * @Title: * @Description: * @Copyright: Copyright (c) 2015 * @Company: * * @author: SAM-SHO * @version: 1.0 * @CreateDate:Jan 21, 2015 */ public interface PersonDao { /** * 保存用户实体 * @param name */ public void save(PersonEntity persionEntity); /** * 删除用户实体 * @param id */ public void delete(int id); /** * 查询编号为id的使用用户姓名 * @param id */ public String queryPersonName(int id); /** * 查询编号为id的用户 * @param id */ public PersonEntity getPerson(int id); /** * 查询所有的PersonEntity * @return */ public List<PersonEntity> getAllPerson(); /** * 更新实体 * @param name * @param id */ public void update(String name ,int id); } </span>
5)jdbc配置文件:
<span style="font-size:18px;">driverClassName=com.mysql.jdbc.Driver url=jdbc\:mysql\://localhost\:3306/spring?useUnicode\=true&characterEncoding\=UTF-8 username=root password=root initialSize=1 maxActive=500 maxIdle=2 minIdle=1 </span>
3、spring中Bean管理与注入,事务都采用注解。
二、spring 整合jdbc
(一)配置文件:
<span style="font-size:18px;"><?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <!-- 自动扫描 --> <context:component-scan base-package="main.java.com.spring.jdbc" /> <!-- 打开aop 注解 --> <aop:aspectj-autoproxy /> <!-- 配置数据源 --> <context:property-placeholder location="classpath:jdbc.properties" /><!-- location指向jdbc.properties配置 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${driverClassName}" /> <property name="url" value="${url}" /> <property name="username" value="${username}" /> <property name="password" value="${password}" /> <!-- 连接池启动时的初始值 --> <property name="initialSize" value="${initialSize}" /> <!-- 连接池的最大值 --> <property name="maxActive" value="${maxActive}" /> <!-- 最大空闲值.当经过一个高峰时间后,连接池可以慢慢将已经用不到的连接慢慢释放一部分,一直减少到maxIdle为止 --> <property name="maxIdle" value="${maxIdle}" /> <!-- 最小空闲值.当空闲的连接数少于阀值时,连接池就会预申请去一些连接,以免洪峰来时来不及申请 --> <property name="minIdle" value="${minIdle}" /> </bean> <!-- 需要把 dataSource 注入到jdbcTemplate--> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 配置JDBC的事物管理器:DataSourceTransactionManager --> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 注解事物 --> <!-- <tx:annotation-driven transaction-manager="txManager" /> --> <!-- XML事物 --> <aop:config> <aop:pointcut id="transationPointCut" expression="execution(* main.java.com.spring.jdbc.service..*.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="transationPointCut"/> </aop:config> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="get*" read-only="true" propagation="NOT_SUPPORTED"/> <tx:method name="*" propagation="REQUIRED" isolation="DEFAULT" /> </tx:attributes> </tx:advice> </beans> </span>
1、JDBC的事务管理器为:DataSourceTransactionManager
(二)、dao实现类:使用 JdbcTemplate
<span style="font-size:18px;">/** * * PersonDaoImpl * @title * @desc * @author SAM-SHO * @Dec 28, 2014 */ @Repository public class PersonDaoImpl implements PersonDao { //使用JdbcTemplate,注意需要在配置中,把dataSource数据源注入到jdbcTemplate @Resource private JdbcTemplate jdbcTemplate; @Override public void save(PersonEntity persionEntity) { String sql = "insert into spring_person (person_id, name) values(?,?)"; jdbcTemplate.update(sql, new Object[]{persionEntity.getPersonId(),persionEntity.getName()}, new int[]{Types.INTEGER,Types.VARCHAR}); } @Override public void delete(int id) { String sql = "delete from spring_person where person_id = ?"; jdbcTemplate.update(sql, new Object[]{id}, new int[]{Types.INTEGER}); } @Override public String queryPersonName(int id) { String sql = "select a.name from spring_person a where a.person_id = ?"; String name = jdbcTemplate.queryForObject(sql, new Object[]{id}, String.class); return name; } public PersonEntity getPerson(int id) { String sql = "select a.* from spring_person a where a.person_id = ?"; PersonEntity personEntity = jdbcTemplate.queryForObject(sql, new Object[]{id},new RowMapper<PersonEntity>(){ @Override public PersonEntity mapRow(ResultSet rs, int index) throws SQLException { PersonEntity person = new PersonEntity(); person.setPersonId(rs.getInt("person_id")); person.setName(rs.getString("name")); return person; } }); return personEntity; } @Override public List<PersonEntity> getAllPerson() { String sql = "select a.* from spring_person a"; List<PersonEntity> lists = jdbcTemplate.query(sql, new RowMapper<PersonEntity>(){ @Override public PersonEntity mapRow(ResultSet rs, int index) throws SQLException { PersonEntity person = new PersonEntity(); person.setPersonId(rs.getInt("person_id")); person.setName(rs.getString("name")); return person; } }); return lists; } @Override public void update(String name, int id) { String sql = "update spring_person a set a.name = ? where a.person_id = ?"; jdbcTemplate.update(sql, new Object[]{name,id}, new int[]{Types.VARCHAR,Types.INTEGER}); } } </span>
1、使用JdbcTemplate,注意需要在配置中,把dataSource数据源注入到jdbcTemplate
(三)、测试
<span style="font-size:18px;">/** * SpringJdbcTest * @Title: spring整合jdbc测试 * @Description: * @Copyright: Copyright (c) 2015 * @Company: * * @author: SAM-SHO * @version: 1.0 * @CreateDate:Jan 21, 2015 */ public class SpringJdbcTest { private PersonService mPersonService; @Before public void init(){ ApplicationContext cxt = new ClassPathXmlApplicationContext("application-Jdbc-Context.xml"); mPersonService = (PersonService) cxt.getBean("personServiceImpl"); } @Test public void save() { PersonEntity persionEntity = new PersonEntity(); persionEntity.setName("Sam-Sho-99"); //增 mPersonService.save(persionEntity); } @Test public void delete() { //删除 mPersonService.delete(5); } @Test public void update() { //修改 mPersonService.update("蓝胖子", 6); } @Test public void query() { //查询一个实体 PersonEntity persionEntity = mPersonService.getPerson(9); System.out.println(persionEntity.getPersonId()); System.out.println(persionEntity.getName()); // 查询名字 String personName = mPersonService.queryPersonName(8); System.out.println(personName); //查询多个实体 ArrayList<PersonEntity> lists = (ArrayList<PersonEntity>) mPersonService.getAllPerson(); for (PersonEntity personEntity : lists) { System.out.println(personEntity.getPersonId()); System.out.println(personEntity.getName()); } } }</span>
三、spring 整合hibernate
(一)配置
<span style="font-size:18px;"><?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <!-- 自动扫描 --> <context:component-scan base-package="main.java.com.spring.hibernate" /> <!-- 打开aop 注解 --> <aop:aspectj-autoproxy /> <!-- 配置数据源 --> <context:property-placeholder location="classpath:jdbc.properties" /> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${driverClassName}" /> <property name="url" value="${url}" /> <property name="username" value="${username}" /> <property name="password" value="${password}" /> <!-- 连接池启动时的初始值 --> <property name="initialSize" value="${initialSize}" /> <!-- 连接池的最大值 --> <property name="maxActive" value="${maxActive}" /> <!-- 最大空闲值.当经过一个高峰时间后,连接池可以慢慢将已经用不到的连接慢慢释放一部分,一直减少到maxIdle为止 --> <property name="maxIdle" value="${maxIdle}" /> <!-- 最小空闲值.当空闲的连接数少于阀值时,连接池就会预申请去一些连接,以免洪峰来时来不及申请 --> <property name="minIdle" value="${minIdle}" /> </bean> <!-- Hibernate 的 sessionFactory(使用注解) ,注入数据源和配置 --> <!-- <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" hibernate4的配置--> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" destroy-method="destroy"> <property name="dataSource" ref="dataSource" /> <!-- 自动扫描entity包下所有实体 --> <property name="packagesToScan"> <list> <value>main.java.com.spring.entity</value> </list> </property> <property name="hibernateProperties"> <value> hibernate.dialect=org.hibernate.dialect.MySQL5Dialect hibernate.hbm2ddl.auto=update hibernate.show_sql=false hibernate.format_sql=false hibernate.cache.use_second_level_cache=true hibernate.cache.use_query_cache=false hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider </value> </property> </bean> <!-- 配置Hibernate的事物管理器 :HibernateTransactionManager--> <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <!-- 注解事物 --> <tx:annotation-driven transaction-manager="txManager" /> </beans> </span>
1、启用hibernate的 二级缓存:EhCacheProvider
<span style="font-size:18px;"> hibernate.cache.use_second_level_cache=true hibernate.cache.use_query_cache=false hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider </span>
2、配置Hibernate的事物管理器 :HibernateTransactionManager 。
(二)dao实现类
<span style="font-size:18px;">/** * * PersonDaoImpl * @title * @desc * @author SAM-SHO * @Dec 28, 2014 */ @Repository public class PersonDaoImpl implements PersonDao { @Resource private SessionFactory sessionFactory; private Session getSession(){ return sessionFactory.getCurrentSession(); } @Override public void save(PersonEntity persionEntity) { getSession().persist(persionEntity); } @Override public void delete(int id) { sessionFactory.getCurrentSession().delete(sessionFactory.getCurrentSession().load(PersonEntity.class, id)); } @Override public String queryPersonName(int id) { String sql = "select a.name from spring_person a where a.person_id = ?"; String name = (String) sessionFactory.getCurrentSession().createSQLQuery(sql).setParameter(0, id).uniqueResult(); return name; } public PersonEntity getPerson(int id) { return (PersonEntity) sessionFactory.getCurrentSession().get(PersonEntity.class, id); } @SuppressWarnings("unchecked") @Override public List<PersonEntity> getAllPerson() { String hql = "from PersonEntity"; return sessionFactory.getCurrentSession().createQuery(hql).list();//使用hql } @Override public void update(String name, int id) { String sql = "update spring_person a set a.name = ? where a.person_id = ?"; sessionFactory.getCurrentSession().createSQLQuery(sql)//使用sql .setParameter(0, name) .setParameter(1, id) .executeUpdate(); } public SessionFactory getSessionFactory() { return sessionFactory; } public void setSessionFactory(SessionFactory sessionFactory) { this.sessionFactory = sessionFactory; } } </span>
(三)测试
<span style="font-size:18px;">/** * * @Title: * @Description: * @Copyright: Copyright (c) 2015 * @Company: * * @author: SAM-SHO * @version: 1.0 * @CreateDate:Jan 21, 2015 */ public class SpringHibernateTest { private PersonService mPersonService; @Before public void init(){ ApplicationContext cxt = new ClassPathXmlApplicationContext("application-hibernate-Context.xml"); mPersonService = (PersonService) cxt.getBean("personServiceImpl"); } @Test public void save() { PersonEntity persionEntity = new PersonEntity(); persionEntity.setName("Sam-Sho-99"); //增 mPersonService.save(persionEntity); } @Test public void delete() { //删除 mPersonService.delete(16); } @Test public void update() { //修改 mPersonService.update("蓝胖子", 13); } @Test public void query() { //查询一个实体 // PersonEntity persionEntity = mPersonService.getPerson(9); // System.out.println(persionEntity.getPersonId()); // System.out.println(persionEntity.getName()); // // // 查询名字 // String personName = mPersonService.queryPersonName(8); // System.out.println(personName); //查询多个实体 ArrayList<PersonEntity> lists = (ArrayList<PersonEntity>) mPersonService.getAllPerson(); for (PersonEntity personEntity : lists) { System.out.println(personEntity.getPersonId()); System.out.println(personEntity.getName()); } } } </span>
(四)使用二级缓存 ehcache.xml
<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?> <!-- defaultCache节点为缺省的缓存策略 maxElementsInMemory 内存中最大允许存在的对象数量 eternal 设置缓存中的对象是否永远不过期 true overflowToDisk 把溢出的对象存放到硬盘上 timeToIdleSeconds 指定缓存对象空闲多长时间就过期,过期的对象会被清除掉 timeToLiveSeconds 指定缓存对象总的存活时间 diskPersistent 当jvm结束是是否持久化对象 diskExpiryThreadIntervalSeconds 指定专门用于清除过期对象的监听线程的轮询时间 --> <ehcache> <diskStore path="D:\cache"/> <defaultCache maxElementsInMemory="1000" eternal="false" overflowToDisk="true" timeToIdleSeconds="120" timeToLiveSeconds="180" diskPersistent="false" diskExpiryThreadIntervalSeconds="60"/> <cache name="main.java.com.spring.entity.PersonEntity" maxElementsInMemory="100" eternal="false" overflowToDisk="true" timeToIdleSeconds="300" timeToLiveSeconds="600" diskPersistent="false"/> <!-- 使用自定义cache,需要在该entity中使用 Cache 的region属性指定--> </ehcache> </span>
(五)解决中文和懒加载问题:修改web.xml配置
<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!-- 加载Spring初始化容器对象的监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 设置Spring容器加载配置文件路径 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:applicationContext.xml</param-value> </context-param> <!--中文过滤器 START --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!--中文过滤器 END --> <!-- 解决懒加载 --> <filter> <filter-name>openSessionInView</filter-name> <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> <init-param> <param-name>sessionFactoryBeanName</param-name> <param-value>sessionFactory</param-value> </init-param> </filter> <filter-mapping> <filter-name>openSessionInView</filter-name> <url-pattern>*.action</url-pattern> </filter-mapping> <!-- 设置Struts2 START--> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- Struts2 END--> </web-app> </span>
四、spring 整合jpa
(一)配置
<span style="font-size:18px;"><?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <!-- 自动扫描 --> <context:annotation-config/> <context:component-scan base-package="main.java.com.spring.jpa" /> <!-- JPA 当jpa底层使用hibernate实现,那么entityManagerFactory实际上就是sessionFactory--> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"> <!-- 持久化单元的名称,value的值必须与persistence.xml文件中 persistence-unit标签中 name属性的值保持一致 --> <property name="persistenceUnitName" value="springJpa"/> </bean> <!-- JPA的事物管理器: JpaTransactionManager--> <bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory"/> </bean> <!-- 注解方式的事务 --> <tx:annotation-driven transaction-manager="txManager"/> </beans> </span>
(二)Jpa持久化单元配置(代替jdbc.properties)
<span style="font-size:18px;"><?xml version="1.0"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"> <persistence-unit name="springJpa" transaction-type="RESOURCE_LOCAL"><!-- 本地事务 --> <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/> <property name="hibernate.connection.driver_class" value="org.gjt.mm.mysql.Driver"/> <property name="hibernate.connection.username" value="root"/> <property name="hibernate.connection.password" value="root"/> <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/spring?useUnicode=true&characterEncoding=UTF-8"/> <property name="hibernate.max_fetch_depth" value="3"/> <property name="hibernate.hbm2ddl.auto" value="update"/> <property name="hibernate.show_sql" value="false"/> <property name="hibernate.format_sql" value="false"/> </properties> </persistence-unit> </persistence> <!-- 1. persistence.xml名称不能更改 ,持久化单元名称 2. name="springJpa" 对应 beans.xml中的<property name="persistenceUnitName" value="springJpa"/> --></span>
1、Jpa的实现使用的还是Hibernate 。
2、持久化单元的配置,一定要放在classpath下 META-INF/ 文件夹下。
(三)dao的实现类
<span style="font-size:18px;">/** * * @Title: * @Description: * @Copyright: Copyright (c) 2015 * @Company: * * @author: SAM-SHO * @version: 1.0 * @CreateDate:Jan 21, 2015 */ @Repository public class PersonDaoImpl implements PersonDao { //注入EntityManager @PersistenceContext EntityManager entityManager; @Override public void save(PersonEntity persionEntity) { entityManager.persist(persionEntity); } @Override public void delete(int id) { //getReference类似于sessionFactory的load方法 entityManager.remove(entityManager.getReference(PersonEntity.class, id)); } @Override public String queryPersonName(int id) { String sql = "select a.name from PersonEntity a where a.personId = ?"; return (String) entityManager.createQuery(sql).setParameter(1, id).getSingleResult(); } public PersonEntity getPerson(int id) { return entityManager.find(PersonEntity.class, id); } @SuppressWarnings("unchecked") @Override public List<PersonEntity> getAllPerson() { String hql = "select o from PersonEntity o"; return entityManager.createQuery(hql).getResultList(); } @Override public void update(String name, int id) { String sql = "update PersonEntity a set a.name = ? where a.personId = ?"; entityManager.createQuery(sql) .setParameter(1, name) .setParameter(2, id)//这边的参数位置与sessionFaction的不同,从1开始 .executeUpdate(); // entityManager.merge(PersonEntity) } } </span>
(四)测试
<span style="font-size:18px;">/** * * @Title: * @Description: * @Copyright: Copyright (c) 2015 * @Company: * * @author: SAM-SHO * @version: 1.0 * @CreateDate:Jan 21, 2015 */ public class SpringJpaTest { private PersonService mPersonService; @Before public void init(){ ApplicationContext cxt = new ClassPathXmlApplicationContext("application-jpa-Context.xml"); mPersonService = (PersonService) cxt.getBean("personServiceImpl"); } @Test public void save() { PersonEntity persionEntity = new PersonEntity(); persionEntity.setName("Sam-Sho-JPA"); //增 mPersonService.save(persionEntity); } @Test public void delete() { //删除 mPersonService.delete(16); } @Test public void update() { //修改 mPersonService.update("蓝胖子", 16); } @Test public void query() { //查询一个实体 // PersonEntity persionEntity = mPersonService.getPerson(16); // System.out.println(persionEntity.getPersonId()); // System.out.println(persionEntity.getName()); // // // 查询名字 String personName = mPersonService.queryPersonName(16); System.out.println(personName); //查询多个实体 // ArrayList<PersonEntity> lists = (ArrayList<PersonEntity>) mPersonService.getAllPerson(); // for (PersonEntity personEntity : lists) { // System.out.println(personEntity.getPersonId()); // System.out.println(personEntity.getName()); // } } } </span>
时间: 2024-10-10 08:04:33