目录
- Spring 整合 MyBatis
- Spring 整合 Junit
Spring 整合 MyBatis
- MyBatis 程序核心对象分析
// 初始化 SqlSessionFactory
// 1. 创建SqlSessionFactoryBuilder对象
SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
// 2. 加载SqlMapConfig.xml配置文件
InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml");
// 3. 创建SqlSessionFactory对象
SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(inputStream);
// 获取连接,获取实现
// 4. 获取SqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
// 5. 执行SqlSession对象执行查询,获取结果User
AccountDao accountDao = sqlSession.getMapper(AccountDao.class);
// 获取数据层接口
Account ac = accountDao.findById(2);
System.out.println(ac);
// 关闭连接
// 6. 释放资源
sqlSession.close();
三个对象:SqlSessionFactory、SqlSession、accountDao
但最核心的对象是 SqlSessionFactory
这个对象由配置得来的:
configuration>
properties resource="jdbc.properties">properties>
typeAliases>
package name="com.itheima.domain"/>
typeAliases>
environments default="mysql">
environment id="mysql">
transactionManager type="JDBC">transactionManager>
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.passwo服务器托管网rd}">property>
dataSource>
environment>
environments>
mappers>
package name="com.itheima.dao">package>
mappers>
configuration>
- Spring 整合 MyBatis
-
- 导坐标:
dependency>
groupId>org.springframeworkgroupId>
artifactId>spring-jdbcartifactId>
version>5.2.10.RELEASEversion>
dependency>
dependency>
groupId>org.mybatisgroupId>
artifactId>mybatis-springartifactId>
version>1.3.0version>
dependency>
-
- 将配置文件转换为类:
//定义bean,SqlSessionFactoryBean,用于产生SqlSessionFactory对象
@Bean
public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource){
SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();
ssfb.setTypeAliasesPackage("com.itheima.domain");
ssfb.setDataSource(dataSource);
return ssfb;
}
//定义bean,返回MapperScannerConfigurer对象
@Bean
public MapperScannerConfigurer mapperScannerConfigurer(){
MapperScannerConfigurer msc = new MapperScannerConfigurer();
msc.setBasePackage("com.itheima.dao");
return msc;
}
Spring 整合 Junit
- 导坐标
dependency>
groupId>junitgroupId>
artifactId>junitartifactId>
version>4.12version>
scope>testscope>
dependency>
dependency>
groupId>org.springframeworkgroupId>
artifactId>spring-testartifactId>
version>5.2.10.RELEASEversion>
dependency>
- Spring 整合 Junit 专用的类加载器
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfig.class)
//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
@Autowired
private AccountService accountService;
@Test
public void testFindById(){
System.out.println(accountService.findById(1));
}
@Test
public void testFindAll(){
System.out.println(accountService.findAll());
}
}
服务器托管,北京服务器托管,服务器租用 http://www.fwqtg.net
(本文为简单介绍,观点源于网络) Python作为一种高级编程语言,因其简洁的语法、强大的库支持和广泛的社区资源而在工业界获得了快速的发展和广泛的应用。在工业控制领域,Python的应用日益增多,这得益于其跨平台性、脚本语言的灵活性以及与硬件设备交互的能力。 …