Spring层编写
1.配置Spring整合Mybatis，数据源使用c3p0
2.编写Spring整合Mybatis文件，spring-mapper.xml
1.关联数据库配置文件
<!-- 1.关联数据库配置文件 --> <!-- 通过spring 读取 database.properties文件 --> <context:property-placeholder location="classpath:database.properties"/>
记得导入context约束，注意约束后缀，不要导错约束
<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 http://www.springframework.org/schema/context/spring-context.xsd">
2.配置数据库连接池
<!-- 2.数据库连接池 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean>
根据数据源的不同，class下的路径也不同
3.定义sqlSessionFactory
<!-- 3.sqlSessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 创建sqlSessionFactory --> <property name="dataSource" ref="dataSource"/> <!-- 绑定Mybatis配置文件 --> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean>
SqlSessionFactoryBean 代替 Mybatis 中的 SqlSessionFactoryBuiler 来创建 SqlSessionFactory
4.配置扫描mapper接口包,动态实现mapper接口,注入到spring容器中
<!-- 4.配置扫描Dao接口包,动态实现Dao接口,注入到spring容器中 --> <!-- mybatis-spring提供了MapperScannerConfigurer这个类，它将会查找类路径下的映射器并自动将它们创建成MapperFactoryBean --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 注入sqlSessionFactory --> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!-- 扫描Mapper接口包 --> <property name="basePackage" value="com.autumn.mapper"/> </bean>
3.编写Spring整合Service层文件，spring-service.xml
1.扫描service下的包
<!-- 1.扫描service下的包 --> <context:component-scan base-package="com.autumn.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" 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">
2.将业务类注入Spring容器中
<!-- 2.将业务类注入到Spring 可通过配置或者注解实现 --> <bean id="BookServiceImpl" class="com.autumn.service.BookServiceImpl"> <property name="bookMapper" ref="bookMapper"/> </bean>
3.声明式事务
<!-- 3.声明式事务 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 注入数据源 --> <property name="dataSource" ref="dataSource"/> </bean>