Spring整合Mybatis的方式
阿新 • • 發佈:2021-10-20
匯入依賴的jar包
<dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13.2</version> <scope>test</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.49</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>5.2.0.RELEASE</version> </dependency> <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>1.9.7</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <dependency>
寫一個類
public class User {
private int id;
private String name;
private String pwd;
}
寫一個介面
public interface UserMapper {
public List<User> selectUser();
}
配置mybatis-config.xml檔案
<mapper namespace="com.kangdamu.mapper.UserMapper"> <select id="selectUser" resultType="user"> select * from user; </select> </mapper>
配置spring xml檔案
<?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" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!--DateSource:使用Spring的資料來源替換Mybatis的配置--> <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/mybatis?useSSL=true&useUnicode=true&characterEncoding=UTF-8"/> <property name="username" value="root"/> <property name="password" value="123456"/> </bean> <!-- sqlSessionFactory--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 繫結Mybatis 配置檔案--> <property name="configLocation" value="classpath:mybatis-config.xml"/> <property name="mapperLocations" value="classpath:com/kangdamu/mapper/*.xml"/> </bean> <!-- SqlSessionTemplate就是使用的sqlSession --> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"> <!-- 只能使用構造器注入sqlSessionFactory,因為它沒有set方法--> <constructor-arg index="0" ref="sqlSessionFactory"/> </bean> <bean id="userMapper" class="com.kangdamu.mapper.UserMapperImpl"> <property name="sqlSession" ref="sqlSession"></property> </bean> </beans>
介面實現類
public class UserMapperImpl implements UserMapper{
//原來所有的操作,都是用sqlSession來執行,現在都使用SqlSessionTemplate
private SqlSessionTemplate sqlSession;
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
@Override
public List<User> selectUser() {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.selectUser();
}
}
寫一個測試類
public class MyTest {
@Test
public void test(){
ApplicationContext context = new ClassPathXmlApplicationContext("spring-dao.xml");
UserMapper userMapper = (UserMapper) context.getBean("userMapper");
for (User user : userMapper.selectUser()) {
}
}
}