Spring的四种配置方式
Spring的4种配置方式根据代理机制不同,有以下几种配置方式:???先定义一个DAO接口及实现类:???public inter
Spring的4种配置方式
根据代理机制不同,有以下几种配置方式:
?
?
?先定义一个DAO接口及实现类:
?
?
?
public interface IUserDao { public void insertUser(UserTable user);}?
实现类:
?
?
?public class UserDaoImpl extends HibernateDaoSupport implements IUserDao{public void insertUser(UserTable user) {getHibernateTemplate().saveOrUpdate(user);}}?
?
第一种
?
??? 为每个bean设置一个代理,这种是根据具体需求来定,如要对具体到每个交易进行事务操作的话,这个方式是最合适的;
?
?<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><!-- 每个bean都有一个代理 --><beans><!-- sessionFactory相当于spring datasource --> <bean id="sessionFactory" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> </bean> <!-- 定义事务管理器(声明式的事务) --> <bean id="transactionManager" ref="sessionFactory" /> </bean> <!-- 配置DAO --> <bean id="userDao" ref="sessionFactory" /> </bean> <!-- 每个bean都有一个代理 <property name="target" ref="userDaoTarget" /> --> <bean id="userDaoProxy" ref="transactionManager" /> <property name="target" ref="userDao" /> <property name="proxyInterfaces" value="org.lgh.spring.transaction2.IUserDao" /> <!-- 配置事务属性 --> <property name="transactionAttributes"> <props> <prop key="*">PROPAGATION_REQUIRED</prop> </props> </property> </bean> </beans>?
第二种:
???? 所有的bean共享一个代理
?<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> <!-- 所有的bean共享一个代理--><beans><bean id="sessionFactory" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> </bean> <!-- 定义事务管理器(声明式的事务) --> <bean id="transactionManager" ref="sessionFactory" /> </bean> <!-- 所有的bean共享一个代理/> --> <bean id="transactionBase" lazy-init="true" abstract="true"> <!-- 配置事务管理器 --> <property name="transactionManager" ref="transactionManager" /> <!-- 配置事务属性 --> <property name="transactionAttributes"> <props> <prop key="*">PROPAGATION_REQUIRED</prop> </props> </property> </bean> <!-- 配置DAO --> <bean id="userDao" ref="sessionFactory" /> </bean> <!-- 所有的bean共享一个代理/> --> <bean id="userDaoProxy" parent="transactionBase" > <property name="target" ref="userDao" /> </bean></beans>?
?
?
?
?
?
第三种:
???使用拦截器 来配置你的事务,这个主要是进行一些方法调用前后进行一些其他事件的处理,如进行权限检查等...
代码如下:
?
?<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> <!-- 使用拦截器 --><beans><bean id="sessionFactory" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> </bean> <!-- 定义事务管理器(声明式的事务) --> <bean id="transactionManager" ref="sessionFactory" /> </bean> <bean id="transactionInterceptor" ref="transactionManager" /> <!-- 配置事务属性 --> <property name="transactionAttributes"> <props> <prop key="*">PROPAGATION_REQUIRED</prop> </props> </property> </bean> <bean name="logger" ref="sessionFactory" /> </bean> <!-- 服务层 service--> <bean id="userService" ref="userDao" /> </bean></beans>?
?
??
?
?
第四种:
? 使用aop:config配置方式
?<?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"> <context:annotation-config /> <context:component-scan base-package="org.lgh.spring.transaction5" /> <bean id="sessionFactory" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> </bean> <!-- 定义事务管理器(声明式的事务) --> <bean id="transactionManager" ref="sessionFactory" /> </bean> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="*" propagation="REQUIRED" /> </tx:attributes> </tx:advice> <aop:config proxy-target-> <aop:pointcut id="interceptorPointCuts" expression="execution(* org.lgh.spring.transaction5.*.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="interceptorPointCuts" /> </aop:config> <!-- 配置DAO --> <bean id="userDao" ref="sessionFactory" /> </bean> </beans>?
?
?
?
?
?
?
还有一种就是采用全注解方式:
??? 代码如下:
?<?xml version="1.0" encoding="UTF-8"?><!--全注解 --><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"> <context:annotation-config /> <context:component-scan base-package="org.lgh.spring.transaction6" /> <tx:annotation-driven proxy-target-class ="true" transaction-manager="transactionManager"/> <bean id="sessionFactory" value="classpath:hibernate.cfg.xml" /> <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> </bean> <!-- 定义事务管理器(声明式的事务) --> <bean id="transactionManager" ref="sessionFactory" /> </bean> <!-- 配置DAO --> <bean id="userDao" ref="sessionFactory" /> </bean> </beans>?
?
所用到的jar如下:
?
?
?
?