14.mybatis整合spring

1.指定扫描包
配置文件是SqlMapConfig.xml，如下：

<?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>
    <!-- 设置别名 -->
    <typeAliases>
        <!-- 2. 指定扫描包，会把包内所有的类都设置别名，别名的名称就是类名，大小写不敏感 -->
        <package name="cn.itcast.xh.pojo" />
    </typeAliases>

</configuration>

2.配置SqlSessionFactoryBean。
 

<context:property-placeholder location="classpath:db.properties" />
    <!-- 数据库连接池 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
        <property name="maxActive" value="10" />
        <property name="maxIdle" value="5" />
    </bean>

    <!-- 配置SqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 配置mybatis核心配置文件 -->
        <property name="configLocation" value="classpath:SqlMapConfig.xml" />
        <!-- 配置数据源 -->
        <property name="dataSource" ref="dataSource" />
    </bean>

3.测试
 

@Test
    public void test8() {
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        
        SqlSessionFactory sqlSessionFactory = (SqlSessionFactory) ac.getBean("sqlSessionFactory");
        
        // 4. 创建SqlSession对象
        SqlSession sqlSession = sqlSessionFactory.openSession();
        List<Tag> list = sqlSession.selectList("queryTag");
        System.out.println(list.size());
        // 7. 释放资源
        sqlSession.close();
        
    }