Spring与Mybatis整合的配置笔记

程序员文章站 2022-03-23 22:46:56

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

Spring与Mybatis整合的配置笔记

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&amp;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&amp;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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Spring与Mybatis整合的配置笔记

目录结构

Mybatis-Spring、Mybatis、Spring的对应关系

maven配置

spring-dao.xml

sqlMapConfig.xml

applicationContext.xml

dao

StudentMapper

StudentMapperImpl

StudentMapper.xml

测试代码

方式2—简化版

StudentMapperImpl

spring-dao.xml

applicationContext.xml

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