阅读目录
一、概述
Spring整合Hibernate有什么好处?
1、由IOC容器来管理Hibernate的SessionFactory
2、让Hibernate使用上Spring的声明式事务
二、整合步骤
1.大致步骤
1)、加入Hibernate
- 加入hibernate jar包
- 添加Hibernate的配置文件:hibernate.cfg.xml
2)、加入Spring
- 加入spring jar包
- 加入Spring配置文件
3)、编写测试类
下图为项目建立的目录结构:
2.具体分析:
1).导入jar包(若是maven工程则可以更加简单)
2).写类及配置文件
a).编写domain类
Classes.java代码如下:
1 package com.yanwu.www.spring_hibernate.domain; 2 3 import java.io.Serializable; 4 5 public class Classes implements Serializable{ 6 private Long cid; 7 private String cname; 8 public Long getCid() { 9 return cid; 10 } 11 12 public void setCid(Long cid) { 13 this.cid = cid; 14 } 15 16 public String getCname() { 17 return cname; 18 } 19 20 public void setCname(String cname) { 21 this.cname = cname; 22 } 23 24 public String getDescription() { 25 return description; 26 } 27 28 public void setDescription(String description) { 29 this.description = description; 30 } 31 32 private String description; 33 }
映射文件Classes.hbm.xml代码如下:
1 <?xml version="1.0" encoding="utf-8"?> 2 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 3 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 4 <hibernate-mapping> 5 <class name="com.yanwu.www.spring_hibernate.domain.Classes"> 6 <id name="cid" type="java.lang.Long" length="5"> 7 <column name="cid"></column> 8 <generator class="increment"></generator> 9 </id> 10 <property name="cname" length="20"></property> 11 <property name="description" length="50"></property> 12 </class> 13 </hibernate-mapping>
b).编写dao类
ClassesDao.java代码如下:
1 package com.yanwu.www.spring_hibernate.dao; 2 3 import com.yanwu.www.spring_hibernate.domain.Classes; 4 5 public interface ClassesDao { 6 public void saveClasses(Classes classes); 7 }
c).编写dao实现类Impl
ClassesDaoImpl.java代码如下:
1 package com.yanwu.www.spring_hibernate.dao.impl; 2 3 import org.springframework.orm.hibernate3.support.HibernateDaoSupport; 4 5 import com.yanwu.www.spring_hibernate.dao.ClassesDao; 6 import com.yanwu.www.spring_hibernate.domain.Classes; 7 8 public class ClassesDaoImpl extends HibernateDaoSupport implements ClassesDao{ 9 10 @Override 11 public void saveClasses(Classes classes) { 12 this.getHibernateTemplate().save(classes); 13 } 14 15 }
d).编写service类(业务层接口)
ClassesService.java代码如下:
1 package com.yanwu.www.spring_hibernate.service; 2 3 import com.yanwu.www.spring_hibernate.domain.Classes; 4 5 public interface ClassesService { 6 public void saveClasses(Classes classes); 7 }
e).编写service实现类Impl(业务层接口的实现)
ClassesServiceImpl.java代码如下:
1 package com.yanwu.www.spring_hibernate.service.impl; 2 import com.yanwu.www.spring_hibernate.dao.ClassesDao; 3 import com.yanwu.www.spring_hibernate.domain.Classes; 4 import com.yanwu.www.spring_hibernate.service.ClassesService; 5 6 public class ClassesServiceImpl implements ClassesService{ 7 private ClassesDao classesDao; 8 public ClassesDao getClassesDao() { 9 return classesDao; 10 } 11 public void setClassesDao(ClassesDao classesDao) { 12 this.classesDao = classesDao; 13 } 14 public void saveClasses(Classes classes){ 15 this.classesDao.saveClasses(classes); 16 } 17 }
f).spring的配置
applicationContext.xml的代码如下:
说明:利用配置来得到session工厂
1 <beans xmlns="http://www.springframework.org/schema/beans" 2 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 3 xmlns:aop="http://www.springframework.org/schema/aop" 4 xmlns:tx="http://www.springframework.org/schema/tx" 5 xsi:schemaLocation=" 6 http://www.springframework.org/schema/beans 7 http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 8 http://www.springframework.org/schema/aop 9 http://www.springframework.org/schema/aop/spring-aop-2.5.xsd 10 http://www.springframework.org/schema/tx 11 http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> 12 <!-- 13 Session 工厂配置 14 LocalSessionFactoryBean这个类实例化我们可以得到sessionfactory。 15 该类中有个属性configLocation通过这个属性我们就可以hibernate.cfg.xml建立联系了。 16 id="sessionFactory"的配置需要与hibernate.cfg.xml建立联系 17 --> 18 19 <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 20 <property name="configLocation"> 21 <value>classpath:hibernate.cfg.xml</value> 22 </property> 23 </bean> 24 25 26 27 28 <!-- 加载配置文件jdbc.properties ,在其中保存数据库信息,方便日后维护--> 29 <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> 30 <property name="locations"> 31 <value>classpath:jdbc.properties</value> 32 </property> 33 </bean> 34 35 <!-- 配置数据源 --> 36 <bean id="dataSource" destroy-method="close" 37 class="org.apache.commons.dbcp.BasicDataSource"> 38 <property name="driverClassName" value="${jdbc.driverClassName}" /> 39 <property name="url" value="${jdbc.url}" /> 40 <property name="username" value="${jdbc.username}" /> 41 <property name="password" value="${jdbc.password}" /> 42 </bean> 43 44 <bean id="sessionFactory1" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 45 46 <!-- 引用数据源 --> 47 <property name="dataSource" ref="dataSource"/> 48 49 <!-- 加载实体类的映射文件位置及名称,可以使用通配符 --> 50 <property name="mappingResources"> 51 <list> 52 <value>com/yanwu/www/spring_hibernate/domain/Classes.hbm.xml</value> 53 </list> 54 </property> 55 56 <!-- 配置数据库方言,这里是MySQL --> 57 <property name="hibernateProperties"> 58 <value> 59 hibernate.dialect=org.hibernate.dialect.MySQLDialect 60 </value> 61 </property> 62 63 </bean> 64 65 <bean id="classesDao" class="com.yanwu.www.spring_hibernate.dao.impl.ClassesDaoImpl"> 66 67 <property name="sessionFactory"> 68 <ref bean="sessionFactory1"/> 69 </property> 70 </bean> 71 72 <bean id="classesService" class="com.yanwu.www.spring_hibernate.service.impl.ClassesServiceImpl" > 73 <property name="classesDao"> 74 <ref bean="classesDao"/> 75 </property> 76 </bean> 77 78 <!-- 配置Spring声明式事务 --> 79 <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 80 <property name="sessionFactory"> 81 <ref bean="sessionFactory1"/> 82 </property> 83 </bean> 84 85 <!-- 配置事务事务属性 --> 86 87 <tx:advice id="tx" transaction-manager="transactionManager"> 88 <tx:attributes> 89 <!-- 方法对应的传播属性 --> 90 <tx:method name="save*" read-only="false"/> 91 </tx:attributes> 92 </tx:advice> 93 94 <!-- 配置事务切点,并把切点和事务属性关联起来,事务控制位置,一般在业务实现层 --> 95 <aop:config> 96 <aop:pointcut expression="execution(* com.yanwu.www.spring_hibernate.service.impl.ClassesServiceImpl.*(..))" id="perform"/> 97 <aop:advisor advice-ref="tx" pointcut-ref="perform"/> 98 </aop:config> 99 </beans>
g).hibernate和数据库信息的配置(可选)
hibernate.cfg.xml代码如下:
1 <?xml version='1.0' encoding='utf-8'?> 2 <!DOCTYPE hibernate-configuration PUBLIC 3 "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 4 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 5 <hibernate-configuration> 6 <session-factory> 7 <!-- 8 数据库的用户名 9 --> 10 <property name="connection.username">root</property> 11 <!-- 12 密码 13 --> 14 <property name="connection.password">root</property> 15 <!-- 16 url 17 --> 18 <property name="connection.url"> 19 jdbc:mysql://localhost:3306/test 20 </property> 21 <!-- 22 方言 23 告诉hibernate,要操作的数据库是mysql 24 --> 25 <property name="dialect"> 26 org.hibernate.dialect.MySQLDialect 27 </property> 28 <!-- 29 导入驱动 30 --> 31 <property name="connection.driver_class"> 32 com.mysql.jdbc.Driver 33 </property> 34 <!-- 35 validate 36 只检查结构 37 update 38 检查结构,更新或者创建表 39 create 40 每次启动hibernate时,都要创建表 41 create-drop 42 启动hibernate时创建表,当hibernate关闭时,删除表 43 --> 44 <property name="hbm2ddl.auto">update</property> 45 <property name="show_sql">true</property> 46 <property name="format_sql">true</property> 47 <mapping resource="com/yanwu/www/spring_hibernate/domain/Classes.hbm.xml" /> 48 49 50 </session-factory> 51 </hibernate-configuration>
jdbc.properties代码如下:
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=root
jdbc.password=root
3).写测试类
ClassesServiceTest.java代码如下:
1 package com.yanwu.www.spring_hibernate.test; 2 3 import org.junit.Test; 4 import org.springframework.context.ApplicationContext; 5 import org.springframework.context.support.ClassPathXmlApplicationContext; 6 import com.yanwu.www.spring_hibernate.domain.Classes; 7 import com.yanwu.www.spring_hibernate.service.ClassesService; 8 9 public class ClassesServiceTest { 10 @Test 11 public void testSaveClasses(){ 12 ApplicationContext context = new ClassPathXmlApplicationContext("com/yanwu/www/spring_hibernate/config/applicationContext.xml"); 13 ClassesService classesService = (ClassesService) context.getBean("classesService"); 14 Classes classes = new Classes(); 15 classes.setCname("aa"); 16 classesService.saveClasses(classes); 17 } 18 }
至此,完成了spring和hibernate的整合,第一次写博客,请大家多多指导。提供项目下载地址:https://pan.baidu.com/s/1kUCohYf