介绍
这是一个集成二级缓存（确切的说是ehcache）和spring3以及hibernate4.1的一个快速指导
下边是所使用的api的版本和框架的版本
Java 1.6
Spring 3.2.8.RELEASE
Hibernate 4.2.11.FINAL
Mysql 5
JUnit 4.11
警告：使用Java 8会导致 “org.springframework.core.NestedIOException: ASM ClassReader failed to parse class file – probably due to a new Java class file version that isn’t supported yet …”
警告：使用hibernate4.3.x会导致 “ERROR SessionFactoryImpl:1518 – HHH000302: Unable to construct current session context [org.springframework.orm.hibernate4.SpringSessionContext]java.lang.reflect.InvocationTargetException”
在这个指导里边你将会看到：
使用spring和junit进行测试，以及application加载
dao和service分层
使用ehcache作为二级缓存
spring缓存
spring3+hibernate4+ehcache集成
hibernate统计
many-to-many映射关系
DB表
这个不需要担心，表会自动创建
CREATE DATABASE `learn`
CHARACTER SET 'utf8'
COLLATE 'utf8_general_ci';
USE `learn`;
项目结构
依赖（pom.xml）
<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>
<groupId>info.hevi.learn</groupId>
<artifactId>spring-hibernate-ehcache</artifactId>
<version>1.0</version>
<description>Annotation Based Spring 3 + Hibernate 4 + EHCache + log4j Demo</description>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.build.mainClass>info.hevi.learn.spring3hibernate4ehcache.Main</project.build.mainClass>
<java.version>1.6</java.version>
<spring.version>3.2.8.RELEASE</spring.version>
<hibernate.version>4.2.11.Final</hibernate.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</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-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<!--@Transactional -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-ehcache</artifactId>
<version>${hibernate.version}</version>
</dependency>
<!-- connection pooling with c3p0 -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.27</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<id>JBoss repository</id>
<url>http://repository.jboss.org/nexus/content/groups/public/</url>
</repository>
<repository>
<id>java.net-Public</id>
<url>https://maven.java.net/content/groups/public/</url>
</repository>
</repositories>
</project>
Bean以及hibernate定义（applicationContext.xml）
<?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" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
<!-- Autowired -->
<!-- used to activate annotations in beans already registered in the application context (no matter if they were defined with XML or by package scanning) -->
<context:annotation-config/>
<!-- scans packages to find and register beans within the application context. -->
<context:component-scan base-package="info.hevi.learn.spring3hibernate4ehcache"/>
<!-- enable @Transactional Annotation -->
<tx:annotation-driven transaction-manager="transactionManager"/>
<!--spring cache-->
<bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
<property name="caches">
<set>
<bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" p:name="task" />
</set>
</property>
</bean>
<!-- @PersistenceUnit annotation -->
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>
<!-- classpath*:*.properties-->
<context:property-placeholder location="classpath:db.properties"/>
<!-- data source with c3p0 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"
p:driverClass="${jdbc.driverClassName}"
p:jdbcUrl="${jdbc.url}"
p:user="${jdbc.username}"
p:password="${jdbc.password}"
p:acquireIncrement="${c3p0.acquire_increment}"
p:minPoolSize="${c3p0.min_size}"
p:maxPoolSize="${c3p0.max_size}"
p:maxIdleTime="${c3p0.max_idle_time}"
p:unreturnedConnectionTimeout="${c3p0.unreturned_connection_timeout}"/>
<!-- Hibernate as JPA vendor-->
<bean id="jpaAdapter"
class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"
p:database="${jpa.database}" p:showSql="${jpa.showSql}"/>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<!--<prop key="hibernate.connection.autocommit">${hibernate.connection.autocommit}</prop>-->
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
<prop key="hibernate.show_sql">true</prop>
<!--useful for debugging-->
<prop key="hibernate.generate_statistics">true</prop>
</props>
</property>
<property name="packagesToScan" value="info.hevi.learn.spring3hibernate4ehcache"/>
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
</beans>
Ehcache cache definitions (ehcache.xml)
<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
updateCheck="false">
<diskStore path="cacheIO" />
<defaultCache maxElementsInMemory="10000" eternal="true"
overflowToDisk="false" diskPersistent="false"
diskExpiryThreadIntervalSeconds="1800" memoryStoreEvictionPolicy="FIFO">
</defaultCache>
<cache name="info.hevi.learn.spring3hibernate4ehcache.domain.Country"
maxElementsInMemory="300"
eternal="true"
overflowToDisk="false"
timeToIdleSeconds="12000"
timeToLiveSeconds="12000"
diskPersistent="false"
diskExpiryThreadIntervalSeconds="120"
memoryStoreEvictionPolicy="LRU" />
<cache name="countryCache"
maxElementsInMemory="300"
eternal="true"
overflowToDisk="false"
timeToIdleSeconds="12000"
timeToLiveSeconds="12000"
diskPersistent="false"
diskExpiryThreadIntervalSeconds="120"
memoryStoreEvictionPolicy="LRU" />
<cache name="countryByNameCache"
maxElementsInMemory="300"
eternal="true"
overflowToDisk="false"
timeToIdleSeconds="12000"
timeToLiveSeconds="12000"
diskPersistent="false"
diskExpiryThreadIntervalSeconds="120"
memoryStoreEvictionPolicy="LRU" />
</ehcache>
类图
测试文件
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"/applicationContext.xml"})
public class MainTest {
@Autowired
ILanguageService languageService;
@Autowired
ICountryService countryService;
@After
public void cleanup() {
Logger rootLogger = Logger.getRootLogger();
rootLogger.setLevel(Level.ERROR);
countryService.deleteAll();
languageService.deleteAll();
}
@Before
public void setup() {
Logger rootLogger = Logger.getRootLogger();
Level level = rootLogger.getLevel();
rootLogger.setLevel(Level.ERROR);
Language english = new Language("english");
Language french = new Language("french");
Language german = new Language("german");
Language spanish = new Language("spanish");
Language turkish = new Language("turkish");
Language finnish = new Language("finnish");
languageService.save(english);
languageService.save(french);
languageService.save(german);
languageService.save(spanish);
languageService.save(turkish);
languageService.save(finnish);
Country uk = new Country("uk");
Country us = new Country("us");
Country tr = new Country("tr");
Country es = new Country("es");
Country sw = new Country("sw");
Country fn = new Country("fn");
Country gr = new Country("gr");
countryService.save(uk);
countryService.save(us);
countryService.save(tr);
countryService.save(es);
countryService.save(fn);
countryService.save(sw);
countryService.save(gr);
Country country = countryService.getByName("gr");
// adding some languages to Greece
country.getLanguages().add(english);
country.getLanguages().add(finnish);
country.getLanguages().add(french);
country.getLanguages().add(turkish);
countryService.save(country);
rootLogger.setLevel(level);
}
@Test
public void testCache() {
countryService.getAll();
countryService.getByName("gr");
countryService.getAll();
}
}