一.spring整合mybatis
1.mybatis回顾
<1>目录
<2>依赖
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</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>
<!--jdbc管理事务-->
<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>1.8.3</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.5</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
</dependencies>
<3>实体类
@Data
public class User {
private int id;
private String username;
private String password;
}
<4>mybatis核心配置文件
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/springboot?useSSL=false&useUnicode=true&characterEncoding=UTF8&serverTimezone=GMT
jdbc.username=root
jdbc.password=88888888
<?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>
<!--加载properties属性文件-->
<properties resource="jdbc.properties"></properties>
<!--设置java类型别名-->
<typeAliases>
<package name="com.itheima.pojo"></package>
</typeAliases>
<!--环境配置-->
<environments default="mysql">
<!--mysql环境-->
<environment id="mysql">
<!--使用JDBC类型事务管理器 -->
<transactionManager type="JDBC"></transactionManager>
<!--使用连接池 POOLED-->
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</dataSource>
</environment>
</environments>
<!--加载映射文件,注意注册接口，如果不写这个会报绑定错误-->
<mappers>
<package name="com.itheima.mapper"></package>
</mappers>
</configuration>
<5>编写接口和接口的映射xml配置文件
public interface UserMapper {
public List<User> selectUser();
}
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.itheima.mapper.UserMapper">
<select id="selectUser" resultType="User">
select * from USER
</select>
</mapper>
<6>测试
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
public class MyTest {
@Test
public void test() throws IOException {
String resources = "mybatisConfig.xml";
InputStream in = Resources.getResourceAsStream(resources);
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(in);
SqlSession sqlSession = sqlSessionFactory.openSession(true);
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
List<User> userList = mapper.selectUser();
for(User user : userList){
System.out.println(user);
}
}
}
<7>解决资源无法导出的问题
<!-- 静态资源导出问题 -->
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
2.mybatis-spring
<1>spring整合mybatis方式一
I.Mybatis-Spring
i.是什么
http://mybatis.org/spring/zh/index.html
新依赖Mybatis-Spring，
sqlSessionTemplate是它的核心，作用是为了代替mybatis中的sqlSession
允许mybatis参与到spring的事务管理中
ii.怎么用
使用mybatis-spring需要在xml中配置两个
DataSource数据源
sqlSessionFactory
让spring来管理他们
II.mybaits的核心配置文件
III.spring核心配置文件实现bean管理
IV.用普通类代替原来的测试类
V.测试
VI.优化
编写总配置文件，适用于团队开发，spring.xml中只有mybatis的配置
<2>spring整合mybatis方式二
3.mybatis-spring的事务整合
<1>使用spring的事务管理（声明式aop事务，交给容器管理）
目的：我们做crud的时候，把事务丢进去
I.注册bean对象
在spring-service.xml中配置
II.事务织入
spring中propegation的7种事务配置
