spring整合mybatis

之前的内容是有service层（业务实现层）、dao层（操作数据库），现在新添加一个domain（与业务相关的实体类）

依赖配置
pom.xml

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.itheima</groupId><artifactId>spring_15_spring_mybatis</artifactId><version>1.0-SNAPSHOT</version><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.2.10.RELEASE</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.16</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.16</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.47</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.2.10.RELEASE</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.0</version></dependency></dependencies>
</project>

注解配置
resource/jdbc.properties
mysql数据库相关的配置信息

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring_db?useSSL=false
jdbc.username=root
jdbc.password=

config/JdbcConfig.class

package com.itheima.config;import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;import javax.sql.DataSource;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;@Beanpublic DataSource dataSource(){DruidDataSource ds = new DruidDataSource();ds.setDriverClassName(driver);ds.setUrl(url);ds.setUsername(userName);ds.setPassword(password);return ds;}
}

config/MybatisConfig.class

public class MybatisConfig {//定义bean，SqlSessionFactoryBean，用于产生SqlSessionFactory对象// DataSource dataSource，@Bean定义的方法，形参会根据类型自动注入，也就是上面的JdbcConfig中的DataSource @Beanpublic SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource){SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();// 扫描所有的实体类ssfb.setTypeAliasesPackage("com.itheima.domain");ssfb.setDataSource(dataSource);return ssfb;}//定义bean，返回MapperScannerConfigurer对象@Beanpublic MapperScannerConfigurer mapperScannerConfigurer(){MapperScannerConfigurer msc = new MapperScannerConfigurer();// 扫描与数据库操作的类msc.setBasePackage("com.itheima.dao");return msc;}
}

config/SpringConfig.class

@Configuration
@ComponentScan("com.itheima")
//@PropertySource：加载类路径jdbc.properties文件
@PropertySource("classpath:jdbc.properties")
@Import({JdbcConfig.class,MybatisConfig.class})
public class SpringConfig {
}

业务类
AccountDao
操作数据库，应该是通过MyBatis操作数据库

public interface AccountDao {@Insert("insert into tbl_account(name,money)values(#{name},#{money})")void save(Account account);@Delete("delete from tbl_account where id = #{id} ")void delete(Integer id);@Update("update tbl_account set name = #{name} , money = #{money} where id = #{id} ")void update(Account account);@Select("select * from tbl_account")List<Account> findAll();@Select("select * from tbl_account where id = #{id} ")Account findById(Integer id);
}

AccountServiceImpl

@Service
public class AccountServiceImpl implements AccountService {@Autowiredprivate AccountDao accountDao;public void save(Account account) {accountDao.save(account);}public void update(Account account){accountDao.update(account);}public void delete(Integer id) {accountDao.delete(id);}public Account findById(Integer id) {return accountDao.findById(id);}public List<Account> findAll() {return accountDao.findAll();}
}

App

public class App {public static void main(String[] args) {ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringConfig.class);AccountService accountService = ctx.getBean(AccountService.class);Account ac = accountService.findById(1);System.out.println(ac);}
}

spring整合Junit

pom.xml

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.itheima</groupId><artifactId>spring_16_spring_junit</artifactId><version>1.0-SNAPSHOT</version><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.2.10.RELEASE</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.16</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.6</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.47</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.2.10.RELEASE</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.0</version></dependency><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></dependencies>
</project>

测试类
test/java/com.itheima.service/AccountServiceTest

//设置类运行器
@RunWith(SpringJUnit4ClassRunner.class)
//设置Spring环境对应的配置类
@ContextConfiguration(classes = SpringConfig.class)
public class AccountServiceTest {//支持自动装配注入bean@Autowiredprivate AccountService accountService;@Testpublic void testFindById() {System.out.println(accountService.findById(1));}@Testpublic void testFindAll() {System.out.println(accountService.findAll());}
}