Spring(三）

10. 整合MyBatis

导入相关依赖

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.2.19.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.2.19.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.5.6</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.49</version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>2.0.2</version>
</dependency>
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

配置MyBtais

<?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>
    <typeAliases>
        <package name="com.wyz.bean"/>
    </typeAliases>
    <mappers>
        <mapper resource="mappers/UserMapper.xml"/>
    </mappers>
</configuration>

整合MyBatis到Spring中

要和 Spring 一起使用 MyBatis，需要在 Spring 应用上下文中定义至少两样东西：一个 SqlSessionFactory 和至少一个数据映射器类。

在 MyBatis-Spring 中，可使用 SqlSessionFactoryBean来创建 SqlSessionFactory。

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">
<!--    配置数据源-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/test?useSSL=false"/>
        <property name="username" value="user"/>
        <property name="password" value="he210052253"/>
    </bean>
<!--配置sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg index="0" ref="sqlSessionFactory"/>
    </bean>

    <bean id="userDao" class="com.wyz.dao.UserDaoImpl">
        <property name="sqlSession" ref="sqlSession"/>
    </bean>

    <bean id="userDao1" class="com.wyz.dao.UserDaoImpl1">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>
</beans>

编写UserDao和UserDaoImpl

public interface UserDao {

    List<User> getAll();
}

public class UserDaoImpl implements UserDao {
    private SqlSessionTemplate sqlSession;

    public void setSqlSession(SqlSessionTemplate sqlSession) {
        this.sqlSession = sqlSession;
    }

    @Override
    public List<User> getAll() {
        UserDao userDao = sqlSession.getMapper(UserDao.class);
        return userDao.getAll();
    }
}

测试

ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserDao userDao = context.getBean("userDao1", UserDao.class);
List<User> all = userDao.getAll();
for (User user : all) {
    System.out.println(user);
}

11. 声明式事务

<!--    配置声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <constructor-arg ref="dataSource"/>
    </bean>
    <!--    结合AOP实现事务植入-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add" propagation="REQUIRED"/>
            <tx:method name="delete" propagation="REQUIRED"/>
            <tx:method name="update" propagation="REQUIRED"/>

            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>

<!--    配置事务切入点-->
    <aop:config>
        <aop:pointcut id="pointCut" expression="execution(* com.wyz.dao.UserDao.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pointCut"/>
    </aop:config>