spring环境搭建

1.导入jar包：

2.配置文件 — applicationContext.xml：

　　 添加schema约束，位置：spring-framework-3.2.0.RELEASE—》docs—》spring-framework-reference—》html—》xsd-config.html

再配置service

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
                              http://www.springframework.org/schema/beans/spring-beans.xsd">
    <!-- 配置service 
        <bean> 配置需要创建的对象
            id ：用于之后从spring容器获得实例时使用的
            class ：需要创建实例的全限定类名
    -->
    <bean id="userServiceId" class="com.itheima.a_ioc.UserServiceImpl"></bean>
</beans>

其次，里面可以配置加载jdbc属性文件、数据源、spring框架用于整合Hibernate的工厂bean、事务管理器、组件扫描、引入注解解析器、 事务注解 等。如：

<?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.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context.xsd
                        http://www.springframework.org/schema/aop
                        http://www.springframework.org/schema/aop/spring-aop.xsd
                        http://www.springframework.org/schema/tx 
                        http://www.springframework.org/schema/tx/spring-tx.xsd">
    
    <!-- 加载jdbc属性文件 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
                        
    <!-- 数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${driverClass}"/>
        <property name="jdbcUrl" value="${jdbcUrl}"/>
        <property name="user" value="${user}"/>
        <property name="password" value="${password}"/>
    </bean>
    <!-- spring框架用于整合Hibernate的工厂bean -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 注入Hibernate相关的属性 -->
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
        <!-- 注入Hibernate的映射文件 -->
        <property name="mappingDirectoryLocations">
            <list>
                <value>classpath:com/itheima/bos/domain</value>
            </list>
        </property>
    </bean>
    
    <!-- 事务管理器 -->
    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
    
    <!-- 组件扫描 -->
    <context:component-scan base-package="com.itheima.bos"/>
    <!-- 引入注解解析器 -->
    <context:annotation-config/>
    <!-- 事务注解 -->
    <tx:annotation-driven />
</beans>