Spring与Mybatis整合的配置笔记
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2022-06-24 18:50:25
maven配置在这里插入代码片Mybatis-Spring、Mybatis、Spring的对应关系...
目录结构
Mybatis-Spring、Mybatis、Spring的对应关系
maven配置
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.37</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.18</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.0.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.4</version>
</dependency>
<!--Spring操作数据库需要的包-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
<!--整合Mybatis和Spring的包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
spring-dao.xml
Mybatis的SqlSessionFactory 、SqlSession对象、XXXMapper对象交给Spring管理
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://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">
<!--DataSource:使用Spring的数据源替换Mybatis的配置-->
<bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://192.168.72.142:3306/ssm?useUnicode=true&characterEncoding=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</bean>
<!--1. SqlSessionFactory 相当于:SqlSessionFactory factory = builder.build(inputStream);-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="datasource"/>
<!--关联Mybatis-->
<property name="configLocation" value="classpath:sqlMapConfig.xml"/>
<property name="mapperLocations" value="classpath:com/jarvis/dao/*.xml"/>
</bean>
<!--2. SqlSessionTemplate就是之前我们使用的SqlSession 相当于:SqlSession session = factory.openSession();-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--无set方法,只能使用构造器注入-->
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
<!--配置声明式事务 **把事务看成一个切面类-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" 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">
<!--1. 给哪些方法配置事务 2. 配置事务的传播特性,默认为REQUIRED-->
<tx:attributes>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!--配置事务的织入-->
<aop:config>
<aop:pointcut id="txPointCut" expression="execution(public * com.jarvis.dao.StudentMapperImpl.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
</aop:config>
</beans>
sqlMapConfig.xml
Mybatis中一些设置
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<!--是否开启驼峰命名自动映射-->
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!--懒加载-->
<setting name="lazyLoadingEnabled" value="true"/>
<setting name="aggressiveLazyLoading" value="false"/>
<!--显示开启二级缓存-->
<setting name="cacheEnabled" value="true"/>
</settings>
</configuration>
applicationContext.xml
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://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">
<context:component-scan base-package="com.jarvis"/>
<context:annotation-config/>
<!--开启基于注解的AOP功能:aop名称空间-->
<aop:aspectj-autoproxy/>
<import resource="spring-dao.xml"/>
<!--相当于:StudentMapper studentMapper = session.getMapper(StudentMapper.class);-->
<bean id="studentMapper" class="com.jarvis.dao.StudentMapperImpl">
<property name="sqlSessionTemplate" ref="sqlSession"/>
</bean>
</beans>
dao
StudentMapper
package com.jarvis.dao;
import com.jarvis.pojo.Student;
import java.util.List;
public interface StudentMapper {
List<Student> findAll();
}
StudentMapperImpl
该实现类也由Spring管理了
package com.jarvis.dao;
import com.jarvis.pojo.Student;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;
public class StudentMapperImpl implements StudentMapper {
private SqlSessionTemplate sqlSession; //原先我们的操作都用SqlSession来完成,现在使用SqlSessionTemplate
public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
this.sqlSession = sqlSessionTemplate;
}
public List<Student> findAll(){
StudentMapper mapper = this.sqlSession.getMapper(StudentMapper.class);
return mapper.findAll();
}
}
StudentMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.jarvis.dao.StudentMapper">
<!--开启二级缓存-->
<cache/>
<select id="findAll" resultType="com.jarvis.pojo.Student">
select * from student
</select>
</mapper>
测试代码
public class test {
public static void main(String[] args) throws IOException {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
StudentMapper mapper = context.getBean("studentMapper", StudentMapper.class);
List<Student> all = mapper.findAll();
System.out.println(all);
}
}
方式2—简化版
StudentMapperImpl
实现类继承SqlSessionDaoSupport ,通过getSqlSession()方法得到SqlSession对象,所以无需在spring-dao.xml中配置SqlSessionTemplate了。
package com.jarvis.dao;
import com.jarvis.pojo.Student;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import java.util.List;
public class StudentMapperImpl extends SqlSessionDaoSupport implements StudentMapper {
public List<Student> findAll(){
return getSqlSession().getMapper(StudentMapper.class).findAll();
}
}
spring-dao.xml
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://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">
<!--DataSource:使用Spring的数据源替换Mybatis的配置-->
<bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://192.168.72.142:3306/ssm?useUnicode=true&characterEncoding=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</bean>
<!--SqlSessionFactory 相当于:SqlSessionFactory factory = builder.build(inputStream);-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="datasource"/>
<!--关联Mybatis-->
<property name="configLocation" value="classpath:sqlMapConfig.xml"/>
<property name="mapperLocations" value="classpath:com/jarvis/dao/*.xml"/>
</bean>
<!--配置声明式事务 **把事务看成一个切面类-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" 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">
<!--1. 给哪些方法配置事务 2. 配置事务的传播特性,默认为REQUIRED-->
<tx:attributes>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!--配置事务的织入-->
<aop:config>
<aop:pointcut id="txPointCut" expression="execution(public * com.jarvis.dao.StudentMapperImpl.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
</aop:config>
</beans>
applicationContext.xml
spring-dao中不配做SqlSession,但是需要将实现类和SqlSessionFactory关联起来
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://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">
<context:component-scan base-package="com.jarvis"/>
<context:annotation-config/>
<!--开启基于注解的AOP功能:aop名称空间-->
<aop:aspectj-autoproxy/>
<import resource="spring-dao.xml"/>
<bean id="studentMapper" class="com.jarvis.dao.StudentMapperImpl">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
</beans>
本文地址:https://blog.csdn.net/weixin_43283513/article/details/109625962
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