Spring入门学习---07
Spring
1、Spring整合Mybatis
导入相关依赖和资源过滤问题
<dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.10.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.10.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.4</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> </resources> </build>
在导入依赖前,我们需要清楚Maven的版本兼容问题
什么是Mybatis-Spring?
需要增加的就几个spring的配置即可
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/> <property name="url" value="jdbc:mysql:///mybatis?useSSL=true&useUnicode=true&serverTimezone=Asia/Shanghai&characterEncoding=UTF-8"/> <property name="username" value="root"/> <property name="password" value="1234"/> </bean> <!-- sqlSessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!-- 绑定mybatis配置文件 --> <property name="configLocation" value="classpath:mybatis-config.xml"/> <property name="mapperLocations" value="classpath:com/charles/mapper/*.xml"/> </bean> <!-- org.mybatis.spring.SqlSessionTemplate就是我们使用的sqlSession --> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"> <!-- 只能使用构造器注入,因为它没有set方法 --> <constructor-arg index="0" ref="sqlSessionFactory"/> </bean>
2、声明式事务
由于编程式事务需要在代码中进行事务的管理,这十分不安全,因此我们推出了声明式事务 即通过AOP的思想进行事务管理
<!-- 配置声明式事务 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <constructor-arg ref="dataSource"/> </bean> <!-- 结合AOP实现事务的织入 --> <!-- 配置事务通知 --> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <!-- 给那些方法配置事务 --> <!-- 配置事务的传播特性propagation:new REQUIRED (spring的默认选择)--> <tx:attributes> <tx:method name="add" propagation="REQUIRED"/> <tx:method name="delete" propagation="REQUIRED"/> <tx:method name="query" read-only="true"/> <tx:method name="*" propagation="REQUIRED"/> </tx:attributes> </tx:advice> <!-- 配置事务切入 --> <aop:config> <aop:pointcut id="pointcut" expression="execution(* com.charles.mapper.*.*(..))"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/> </aop:config>