mybatis学习笔记(10): spring整合mybatis

添加依赖:

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.11</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.37</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${spring.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/springframework/spring-orm -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>${spring.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.mchange/c3p0 -->
<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.2</version>
</dependency>
<dependency>
    <groupId>org.apache.taglibs</groupId>
    <artifactId>taglibs-standard-spec</artifactId>
    <version>1.2.5</version>
</dependency>
<dependency>
    <groupId>org.apache.taglibs</groupId>
    <artifactId>taglibs-standard-impl</artifactId>
    <version>1.2.5</version>
</dependency>

所有的jar：

applicationContext.xml文件：

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    <context:component-scan base-package="com.ssm">
        <context:exclude-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <context:property-placeholder location="classpath*:db.properties" />
    <!-- 数据源配置 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${dev_driver}"></property>
        <property name="jdbcUrl" value="${dev_url}"></property>
        <property name="user" value="${dev_username}"></property>
        <property name="password" value="${dev_password}"></property>
    </bean>

    <!-- 整合mybatis -->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <!-- 使用Mybatis配置文件，简化这里面的配置，比如settings配置可以放在Mybatis配置文件里 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!-- 配置映射文件的位置 -->
        <property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"></property>
        <!-- 指定包内的实体类引用可以使用别名，可配合@Alias注解使用 -->
        <property name="typeAliasesPackage" value="com.ssm.domain"></property>
    </bean>

    <!-- 配置扫描mapper接口文件，自动为其注册bean -->
    <!-- #方式一 -->
    <mybatis-spring:scan base-package="com.ssm.mapper"/>

     <!-- #方式二 -->
   <!--  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.ssm.mapper"></property>
    </bean> -->


    <!-- 事务管理 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!-- 开启注解事务管理 -->
    <tx:annotation-driven transaction-manager="transactionManager" />
</beans>

整合思路:
将数据源配置交给spring容器管理
将Mapper代理对象的生成交给spring容器管理
将事务控制交给容器管理

Mapper 接口文件:

public interface EmployeeMapper {

    public List<Employee> getEmps ();
}

Mapper XML文件：

<mapper namespace="com.ssm.mapper.EmployeeMapper">
    <!-- <cache type="org.mybatis.caches.ehcache.EhcacheCache"></cache> -->
    <select id="getEmps" resultType="com.ssm.domain.Employee">
        select * from tbl_employee
    </select>
</mapper>

spring容器会根据Mapper XML文件创建代理类，并将之注册到容器内。

测试：

@Test
public void testssm(){
    ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    EmployeeMapper mapper = ac.getBean(EmployeeMapper.class);
    List<Employee> emps = mapper.getEmps();
    for (Employee emp : emps) {
        System.out.println(emp);
    }
}