应用上下文配置【AppConfig】

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从spring3.0开始，Spring将JavaConfig整合到核心模块，普通的POJO只需要标注@Configuration注解，就可以成为spring配置类，并通过在方法上标注@Bean注解的方式注入bean。

Xml配置和Java类配置对比如下：

applicationContext-AppConfig.xml

Xml代码  

1. <!-- 激活自动代理功能 参看：web.function.aop.aspect.DemoAspect -->  
2.     <aop:aspectj-autoproxy proxy-target-class="true" />  
3.       
4.     <context:component-scan base-package="web.function">  
5.         <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>  
6.     </context:component-scan>  
7.       
8.       
9.     <import resource="classpath:config/context/applicationContext-CachingConfig.xml" />  
10.     <import resource="classpath:config/context/applicationContext-DaoConfig.xml" />  

 AppConfig.java

Java代码  

1. @Configuration  
2. @ComponentScan(basePackages = "web.function", excludeFilters = { @ComponentScan.Filter(type = FilterType.ANNOTATION, value = { Controller.class }) })  
3. @EnableAspectJAutoProxy(proxyTargetClass=true)  
4. @Import({CachingConfig.class,DaoConfig.class})  
5. public class AppConfig {  
6. }  

applicationContext-CachingConfig.xml

Xml代码  

1. <!-- 启用缓存注解 -->  
2. <cache:annotation-driven cache-manager="cacheManager" />  
3.   
4. <!-- cacheManager工厂类，指定ehcache.xml的位置 -->  
5. <bean id="cacheManagerFactory"  
6.     class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"  
7.     p:configLocation="classpath:/config/ehcache.xml" />  
8.   
9. <!-- 声明cacheManager -->  
10. <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager"  
11.     p:cacheManager-ref="cacheManagerFactory" />  

CachingConfig.java 

Java代码  

1. @Configuration  
2. @EnableCaching//<!-- 启用缓存注解 --> <cache:annotation-driven cache-manager="cacheManager" />  
3. public class CachingConfig {  
4.     private static final Logger logger = Logger.getLogger(CachingConfig.class);  
5.   
6.   
7.     @Bean  
8.     public EhCacheManagerFactoryBean ehCacheManagerFactoryBean() {  
9.         EhCacheManagerFactoryBean ehCacheManagerFactoryBean = new EhCacheManagerFactoryBean();  
10.         ehCacheManagerFactoryBean.setConfigLocation(new ClassPathResource(  
11.                 "config/ehcache.xml"));  
12.         return ehCacheManagerFactoryBean;  
13.     }  
14.   
15.     @Bean  
16.     public CacheManager cacheManager() {  
17.         logger.info("EhCacheCacheManager");  
18.         EhCacheCacheManager cacheManager = new EhCacheCacheManager();  
19.         cacheManager.setCacheManager(ehCacheManagerFactoryBean().getObject());  
20.         return cacheManager;  
21.     }  
22. }  

applicationContext-DaoConfig.xml

Xml代码  

1. <import resource="classpath:config/context/applicationContext-DataSourceConfig.xml" />  
2.   
3.       
4.     <bean id="sessionFactory"  
5.         class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">  
6.         <property name="dataSource" ref="dataSource" />  
7.         <property name="packagesToScan">  
8.             <list>  
9.                 <value>web.function.**.model.oracle</value>  
10.             </list>  
11.         </property>  
12.         <property name="hibernateProperties">  
13.             <props>  
14.                 <prop key="hibernate.dialect">  
15.                     ${hibernate.dialect}  
16.                 </prop>  
17.                 <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>  
18.                 <prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>  
19.             </props>  
20.         </property>  
21.     </bean>  
22.   
23.       
24.     <!-- hibernateDAO -->  
25.     <bean id="hibernateDAO" class="web.dao.hibernate.impl.CP_Hibernate4DAOImpl">  
26.       <property name="sessionFactory" ref="sessionFactory"></property>  
27.     </bean>  
28.       
29.       
30.       
31.       
32.     <bean id="transactionManager"  
33.         class="org.springframework.orm.hibernate4.HibernateTransactionManager">  
34.         <property name="sessionFactory" ref="sessionFactory" />  
35.     </bean>  
36.       
37.     <!-- 启用事务注解功能 -->  
38.     <tx:annotation-driven transaction-manager="transactionManager" />  

DaoConfig.java

Java代码  

1. @Configuration  
2. //启用注解事务管理，使用CGLib代理  
3. @EnableTransactionManagement(proxyTargetClass = true)  
4. @Import({DataSourceConfig.class})  
5. public class DaoConfig {  
6.   
7.     private static final Logger logger = Logger.getLogger(DaoConfig.class);  
8.   
9.       
10.     @Value("${hibernate.dialect}")  
11.     String hibernate_dialect;  
12.     @Value("${hibernate.show_sql}")  
13.     String hibernate_show_sql;  
14.       
15.     /**                                                           
16.     * 描述 : <负责解析资源文件>. <br>  
17.     *<p>  
18.         <这个类必须有，而且必须声明为static，否则不能正常解析>   
19.      </p>                                                                                                                                                                                                                                                 
20.     * @return                                                                                                       
21.     */    
22.     @Bean  
23.     public static PropertySourcesPlaceholderConfigurer placehodlerConfigurer() {  
24.         logger.info("PropertySourcesPlaceholderConfigurer");  
25.         return new PropertySourcesPlaceholderConfigurer();  
26.     }  
27.       
28.     @Resource(name="dataSource")  
29.     public DataSource dataSource;  
30.   
31.       
32.   
33.     @Bean(name = "sessionFactory")  
34.     public LocalSessionFactoryBean localSessionFactoryBean() {  
35.         logger.info("sessionFactory");  
36.         LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();  
37.         sessionFactory.setDataSource(dataSource);  
38.         String[] packagesToScan = new String[] { "web.function.**.model.oracle" };  
39.         sessionFactory.setPackagesToScan(packagesToScan);  
40.   
41.         Properties hibernateProperties = new Properties();  
42.         hibernateProperties.setProperty("hibernate.dialect", hibernate_dialect);  
43.         hibernateProperties.setProperty("hibernate.show_sql",  
44.                 hibernate_show_sql);  
45.         hibernateProperties.setProperty(  
46.                 "hibernate.current_session_context_class",  
47.                 "org.springframework.orm.hibernate4.SpringSessionContext");  
48.         sessionFactory.setHibernateProperties(hibernateProperties);  
49.   
50.         return sessionFactory;  
51.   
52.     }  
53.   
54.     @Bean(name = "hibernateDAO")  
55.     public CP_Hibernate4DAOImpl hibernate4Dao() {  
56.         logger.info("hibernateDAO");  
57.         CP_Hibernate4DAOImpl dao = new CP_Hibernate4DAOImpl();  
58.         dao.setSessionFactory(localSessionFactoryBean().getObject());  
59.         return dao;  
60.     }  
61.   
62.     @Bean(name = "transactionManager")  
63.     public HibernateTransactionManager hibernateTransactionManager() {  
64.         logger.info("transactionManager");  
65.         HibernateTransactionManager hibernateTransactionManager = new HibernateTransactionManager();  
66.         hibernateTransactionManager.setSessionFactory(localSessionFactoryBean()  
67.                 .getObject());  
68.         return hibernateTransactionManager;  
69.     }  
70. }  

applicationContext-DataSourceConfig.xml

Xml代码  

1. <context:property-placeholder  
2.         location="classpath:/config/properties/db.properties" />  
3.   
4.     <!-- 数据源 -->  
5.     <bean id="dataSource"  
6.         class="org.springframework.jdbc.datasource.DriverManagerDataSource">  
7.         <property name="driverClassName" value="${jdbc.driver}" />  
8.         <property name="url" value="${jdbc.url}" />  
9.         <property name="username" value="${jdbc.username}" />  
10.         <property name="password" value="${jdbc.password}" />  
11.     </bean>  

DataSourceConfig.java

Java代码  

1. @Configuration  
2. //加载资源文件  
3. @PropertySource({"classpath:/config/properties/db.properties"})  
4. public class DataSourceConfig {  
5.     private static final Logger logger = Logger.getLogger(DataSourceConfig.class);  
6.     /* 
7.      * 绑定资源属性 
8.      */  
9.     @Value("${jdbc.driver}")  
10.     String driverClass;  
11.     @Value("${jdbc.url}")  
12.     String url;  
13.     @Value("${jdbc.username}")  
14.     String userName;  
15.     @Value("${jdbc.password}")  
16.     String passWord;  
17.       
18.     @Bean(name = "dataSource")  
19.     public DataSource dataSource() {  
20.         logger.info("DataSource");  
21.         DriverManagerDataSource dataSource = new DriverManagerDataSource();  
22.         dataSource.setDriverClassName(driverClass);  
23.         dataSource.setUrl(url);  
24.         dataSource.setUsername(userName);  
25.         dataSource.setPassword(passWord);  
26.         return dataSource;  
27.     }  
28. }  

DataSource如果使用JNDI的方式如下：

xml配置：

Xml代码  

1. <jee:jndi-lookup id="dataSource" jndi-name="jdbc/demoDB" />  

Java类配置：

Java代码  

1. @Bean  
2.     public JndiObjectFactoryBean jndiObjectFactoryBean(){  
3.         JndiObjectFactoryBean factory = new JndiObjectFactoryBean();  
4.     //  factory.setJndiName("java:comp/env/jdbc/demoDB"); //两种方式均可，spring会自动补齐  
5.                 factory.setJndiName("jdbc/demoDB");  
6.         return factory;  
7.     }  
8.       
9.     @Bean(name = "dataSource")  
10.     public DataSource dataSource() throws Exception{  
11.         logger.info("DataSourceJNDI");  
12.         return (DataSource)jndiObjectFactoryBean().getObject();  
13.           
14.     }  

应用上下文配置【AppConfig】

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原文地址：http://www.cnblogs.com/yhtboke/p/5764694.html