关于spring:SpringMybatis

导包

<dependencies>
     <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
         <version>4.12</version>
     </dependency>
     <dependency>
         <groupId>mysql</groupId>
         <artifactId>mysql-connector-java</artifactId>
         <version>5.1.47</version>
     </dependency>
     <dependency>
         <groupId>org.mybatis</groupId>
         <artifactId>mybatis</artifactId>
         <version>3.5.2</version>
     </dependency>
     <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-webmvc</artifactId>
         <version>5.1.9.RELEASE</version>
     </dependency>
     <!--Spring 操作数据库的话，还须要一个 spring-jdbc-->
     <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-jdbc</artifactId>
         <version>5.1.9.RELEASE</version>
     </dependency>
     <dependency>
         <groupId>org.aspectj</groupId>
         <artifactId>aspectjweaver</artifactId>
         <version>1.8.13</version>
     </dependency>
     <dependency>
         <groupId>org.mybatis</groupId>
         <artifactId>mybatis-spring</artifactId>
         <version>2.0.2</version>
     </dependency>
     <dependency>
         <groupId>org.projectlombok</groupId>
         <artifactId>lombok</artifactId>
         <version>1.18.10</version>
     </dependency>
 </dependencies>

编写数据源配置

<!--DataSource: 应用 Spring 的数据源替换 Mybatis 的配置 c3p0 dbcp druid
咱们这里应用 Spring 提供的 JDBC:org.springframework.jdbc.datasource
-->
<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"/>
 <property name="username" value="root"/>
 <property name="password" value="196840xrk"/>
</bean>

sqlSessionFactory

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
 <property name="dataSource" ref="datasource"/>
 <!-- 绑定 Mybatis 配置文件 -->
 <property name="configLocation" value="classpath:mybatis-config.xml"/>
 <property name="mapperLocations" value="classpath:com/sunfl/mapper/*.xml"/>
</bean>

sqlSessionTemplate

<!--SqlSessionTemplate 就是咱们应用的 sqlSession-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
 <!-- 只能应用结构器注入 sqlSessionFactory，因为它没有 set 办法 -->
 <constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>

须要给接口增加实现类

public class UserMapperImpl implements UserMapper{

 // 咱们的所有操作，在原来都应用 sqlSession 来执行，当初都应用 SqlSessionTemple
 private SqlSessionTemplate sqlSession;

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

 public List<User> selectUser() {UserMapper mapper = sqlSession.getMapper(UserMapper.class);
     return mapper.selectUser();}
}

将本人写的实现类注入到 spring 中

<bean id="userMapper" class="com.sunfl.mapper.UserMapperImpl">
 <property name="sqlSession" ref="sqlSession"/>
</bean>

测试应用

ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
List<User> userList = userMapper.selectUser();
for (User user : userList) {System.out.println(user);
}