Spring整合Mybatis/Junit

• 原生Mybatis的XML配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <properties resource="jdbc.properties" />
    <typeAliases>
    	<package name="com.itheima.domain" />
    </typeAliases>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <!--数据库连接信息-->
                <property name="driver" value="${jdbc.Driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <!--加载sql的映射文件-->
        <mapper resource="UserMapper.xml"/>
    </mappers>
</configuration>

Spring整合MyBatis

1. 第一步：添加对应的坐标

   <dependencies>
       <!-- Spring的坐标【Spring技术的核心】 -->
   	<dependency>
       	<groupId>org.springframework</groupId>
           <artifactId>spring-context</artifactId>
           <version>5.2.10.RELEASE</version>
       </dependency>
       
       <!-- druid数据连接池 -->
   	<dependency>
       	<groupId>com.alibaba</groupId>
           <artifactId>druid</artifactId>
           <version>1.1.16</version>
       </dependency>
       
       <!-- MyBatis的坐标 -->
   	<dependency>
       	<groupId>org.mybatis</groupId>
           <artifactId>mybatis</artifactId>
           <version>3.5.6</version>
       </dependency>
       
       <!-- mysql的坐标 -->
   	<dependency>
       	<groupId>mysql</groupId>
           <artifactId>mysql-connector-java</artifactId>
           <version>5.1.47</version>
       </dependency>
       
       <!-- Spring操作数据库专用的包坐标 -->
   	<dependency>
       	<groupId>org.springframework</groupId>
           <artifactId>spring-jdbc</artifactId>
           <version>5.2.10.RELEASE</version>
       </dependency>
       
       <!-- Spring整合Mybatis的包坐标【版本号要与mybatis版本对应】 -->
       <dependency>
       	<groupId>org.mybatis</groupId>
           <artifactId>mybatis-spring</artifactId>
           <version>1.3.0</version>
       </dependency>
   </dependencies>

2. 第二步：创建外部配置文件【jdbc.properties】

   jdbc.driver=com.mysql.jdbcDriver
   jdbc.url=jdbc.mysql://127.0.0.1:3306/spring_db
   jdbc.username=root
   jdbc.password=123456

3. 第三步：创建数据源配置类【JdbcConfig.java】

   public class JdbcConfig{
       @Value("${jdbc.driver}")
       private String driver;
       @Value("${jdbc.url}")
       private String url;
       @Value("${jdbc.username}")
       private String username;
       @Value("${jdbc.password}")
       private String password;
       
       @Bean
       public DataSource dataSource(){
           DruidDataSource ds = new DruidDataSource();
           ds.setDriverClassName(driver);
           ds.setUrl(url);
           ds.setUsername(username);
           ds.setPassword(password);
           return ds;
       }
   }

4. 第四步：创建配置类【SpringConfig.java】

   @Configuration						//声明为Spring的配置类
   @ComponentScan("com.itheima")					//bean的扫描
   @PropertySource("classpath:jdbc.properties")		//扫描外部配置文件
   @Import({JdbcConfig.class,MybatisConfig.class})				//第三方的bean管理
   public class SpringConfig{}

5. 第五步：创建一个Mybatis的配置类用于管理第三方(Mybatis)的bean【MybatisConfig.java】代替原生Mybatis的xml配置文件

   
   

   public class MybatisConfig{
       @Bean
       public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource){
           SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();
           ssfb.setTypeAliasesPackage("com.itheima.domian");//原生XML配置的<typeAliases>标签
           ssfb.setDataSource(dataSource);//原生XML配置的<dataSource>标签
           return ssfb;
       }
       
       @Bean
       public MapperScannerConfigurer mapperScannerConfiguree(){	//原生XML配置的mapper映射标签
           MapperScannerConfigurer msc = new MapperScannerConfigurer();
           msc.setBasePackage("com.itheima.dao");
           return msc;
       }
   }

Spring整合Junit

1. 添加对应的坐标

   <dependency>
   	<groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.12</version>
       <scope>test</scope>
   </dependency>
   
   <dependency>
   	<groupId>org.springframework</groupId>
       <artifactId>spring-test</artifactId>
       <version>5.2.10.RELEASE</version>
   </dependency>

2. 创建测试类【MyTestClass.java】

   @RunWith(SpringJUnit4ClassRunner.class)			//Spring整合JUnit专用的类加载器
   @ContextConfiguration(classes = SpringConfig.class)		//指定Spring上下文配置
   public class AccountServiceTest {
       
       @Autowired
   	private MyService myservice;
       
       @Test
       public void myTestOne(){ /*函数实现*/  	};
   }