观察者模式: 观察者:ServletContextListener 被观察者:ServletContext 事件:ServletContext对象被创建或者被销毁 监听器方法就被执行 Spring的事件编程就是观察者模式的体现 定义的ApplicationListener接口就是用来监听Application的事件 ApplicationContext内置了几个事件:ContextRefreshedEvent,ContextStartedEvent,ContextClosedEvent 策略模式重要实现就是面向接口编程,几个实现类可以互相切换,这就是我们Spring的策略模式 模板类的模板方法调用的是子类方法的执行观察者模式: 观察者:ServletContextListener 被观察者:ServletContext 事件:ServletContext对象被创建或者被销毁 监听器方法就被执行 Spring的事件编程就是观察者模式的体现 定义的ApplicationListener接口就是用来监听Application的事件 ApplicationContext内置了几个事件:ContextRefreshedEvent,ContextStartedEvent,ContextClosedEvent 策略模式重要实现就是面向接口编程,几个实现类可以互相切换,这就是我们Spring的策略模式 模板类的模板方法调用的是子类方法的执行
<?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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 引入外部的Spring配置文件--> <import resource="common.xml"></import> <!-- 引入外部的配置文件--> <context:property-placeholder location="jdbc.properties"></context:property-placeholder> <!-- 配置数据源--> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="${jdbc.driver}"></property> <property name="url" value="${jdbc.url}"></property> <property name="username" value="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> </bean> <!-- 配置SqlSessionFactoryBean--> <bean class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 指定数据源--> <property name="dataSource" ref="dataSource"></property> <!-- 指定mybatis核心配置文件--> <property name="configLocation" value="mybatis-config.xml"></property> <!-- 指定别名,就是我们原本在mybatis-config配置文件里做的--> <property name="typeAliasesPackage" value="com.powernode.bank.pojo"></property> </bean> <!-- mapper扫描配置器,指定我们扫描的Mapper,也是原本在mybatis核心配置文件里完成的--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.powernode.bank.mappers"></property> </bean> <!-- 启用事务管理器--> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 启用事务注解--> <tx:annotation-driven transaction-manager="txManager"></tx:annotation-driven> </beans>
<?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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 引入外部的Spring配置文件--> <import resource="common.xml"></import> <!-- 引入外部的配置文件--> <context:property-placeholder location="jdbc.properties"></context:property-placeholder> <!-- 配置数据源--> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="${jdbc.driver}"></property> <property name="url" value="${jdbc.url}"></property> <property name="username" value="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> </bean> <!-- 配置SqlSessionFactoryBean--> <bean class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 指定数据源--> <property name="dataSource" ref="dataSource"></property> <!-- 指定mybatis核心配置文件--> <property name="configLocation" value="mybatis-config.xml"></property> <!-- 指定别名,就是我们原本在mybatis-config配置文件里做的--> <property name="typeAliasesPackage" value="com.powernode.bank.pojo"></property> </bean> <!-- mapper扫描配置器,指定我们扫描的Mapper,也是原本在mybatis核心配置文件里完成的--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.powernode.bank.mappers"></property> </bean> <!-- 启用事务管理器--> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 启用事务注解--> <tx:annotation-driven transaction-manager="txManager"></tx:annotation-driven> </beans>
<?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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!-- 设置组件扫描--> <context:component-scan base-package="com.powernode.bank"></context:component-scan> </beans>
<?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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!-- 设置组件扫描--> <context:component-scan base-package="com.powernode.bank"></context:component-scan> </beans>