桥哥我又来啦！今天咱们要盘一盘Spring和Mybatis这对黄金搭档。Spring负责管理对象，Mybatis负责数据库操作，强强联手，天下我有！整合这两个框架，就像给你的Java项目装上了涡轮增压，效率嗖嗖的！
准备工作：导入依赖
首先，得把需要的“零件”准备好，也就是各种依赖库。在pom.xml文件中，把Spring和Mybatis相关的依赖都加上，就像组装电脑一样，螺丝钉一个都不能少。
ounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(line <!-- 其他依赖 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>...</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>...</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>...</version> </dependency> <!-- 其他依赖 -->
创建POJO类：实体化数据
有了依赖，接下来就要创建POJO类，也就是普通的Java对象。这些类对应数据库中的表，把数据库里的数据变成Java对象，方便操作。比如数据库里有个user表，就得创建一个User类，里面有id、username、password等属性。
ounter(lineounter(lineounter(lineounter(lineounter(lineounter(line public class User { private int id; private String username; private String password; // getter和setter方法 }
创建Dao接口：数据库操作入口
Dao接口定义了对数据库的操作，比如增删改查。用注解的方式，可以省去不少配置。
ounter(lineounter(lineounter(lineounter(lineounter(line public interface UserDao { @Select("SELECT * FROM user WHERE id = #{id}") User getUserById(int id); // 其他数据库操作方法 }
创建Service接口和实现类：业务逻辑层
Service层处理业务逻辑，调用Dao层的方法来操作数据库。
ounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(line public interface UserService { User getUserById(int id); } @Service public class UserServiceImpl implements UserService { @Autowired private UserDao userDao; @Override public User getUserById(int id) { return userDao.getUserById(id); } }
配置文件：连接数据库
jdbc.properties文件配置数据库连接信息，就像告诉程序数据库在哪儿，用户名密码是什么。
ounter(lineounter(lineounter(lineounter(line jdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/your_database_name jdbc.username=your_username jdbc.password=your_password
Spring配置类：管理Bean
Spring配置类负责管理各种Bean，包括SqlSessionFactory和MapperScannerConfigurer。SqlSessionFactory是Mybatis的核心，MapperScannerConfigurer负责扫描Mapper接口。
ounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(line @Configuration @MapperScan("your.mapper.package") // 扫描Mapper接口所在的包 public class MybatisConfig { @Bean public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) throws Exception { SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean(); factoryBean.setDataSource(dataSource); // 其他配置 return factoryBean; } } @Configuration public class JdbcConfig { @Bean public DataSource dataSource() { DruidDataSource dataSource = new DruidDataSource(); // 设置数据库连接信息 return dataSource; } }
温馨提示: 注意导入javax.sql.DataSource，而不是javax.activation.DataSource，否则会掉进坑里！
运行测试：见证奇迹
最后，写个测试类，看看整合是否成功。
ounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(lineounter(line @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(classes = {SpringConfig.class}) public class Test { @Autowired private UserService userService; @Test public void testGetUserById() { User user = userService.getUserById(1); System.out.println(user); } }
总结：Spring + Mybatis = 起飞
Spring和Mybatis的整合，关键在于SqlSessionFactory和MapperScannerConfigurer的配置。搞清楚这两个，整合就So easy！今天的分享就到这里，桥哥下次再带你飞！
