spring-mybatis整合
spring-mybatis整合
需要导入的包
junit
lombok(可选)
mybatis-spring
spring-webmvc
aspectjweaver
mysql-connector-java
mybatis
spring-jdbc
整合方法一
pojo类+mapper+mapper.xml不变
添加一个接口实现类,私有化sqlSessionTemplate
public class StudentMapperImpl implements StudentMapper{
private SqlSessionTemplate sqlSession;
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
public List<Student> getStudent() {
StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);
return mapper.getStudent();
}
}
mybatis-config.xml
<?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>
<typeAlias alias="student" type="com.chao.pojo.Student"/>
</typeAliases>
</configuration>
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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!--配置数据源-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/test1?useUnicode=true&
characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</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"/>
<property name="mapperLocations" value="classpath:com/chao/mapper/*.xml"/>
</bean>
<!--注册sqlSessionTemplate,关联sqlSessionFactory;-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
</beans>
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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="spring-dao.xml"/>
<bean id="StudentMapper" class="com.chao.mapper.StudentMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
</beans>
测试类
@Test
public void test(){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
StudentMapper studentMapper = context.getBean("StudentMapper", StudentMapper.class);
List<Student> students = studentMapper.getStudent();
for (Student student : students) {
System.out.println(student);
}
}
整合方式二
在原来的基础上修改接口实现类和applicationContext.xml中注册它的配置
public class StudentMapperImpl extends SqlSessionDaoSupport implements StudentMapper{
public List<Student> getStudent() {
return getSqlSession().getMapper(StudentMapper.class).getStudent();
}
}
<bean id="StudentMapper" class="com.chao.mapper.StudentMapperImpl">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
spring-dao.xml可以去除掉
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
dao继承Support类 , 直接利用 getSqlSession() 获得 , 然后直接注入SqlSessionFactory . 比起方式1 , 不需要管理SqlSessionTemplate.
SqlSessionDaoSupport是对SqlSessionTemplate的处理,需要的是sqlSessionFactory,因此可以去掉sqlSession的相关配置。