一、Spring整合Mybatis

1.1 整合Mybatis，原配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><properties resource="jdbc.properties"></properties><typeAliases><package name="com.practice.domain"/></typeAliases><environments default="development"><environment id="mysql"><transactionManager type="JDBC"/><dataSource type="POOLED"><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><mapper resource="com.practice.dao"/></mappers>
</configuration>

1.2整合后

package com.practice.config;import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;import javax.sql.DataSource;/*** @Author YJ* @Date 2023/7/31 10:10* Description:Mybatis配置*/
public class MybatisConfig {@Beanpublic SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) {SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();ssfb.setTypeAliasesPackage("com.practice.domain");ssfb.setDataSource(dataSource);return ssfb;}@Beanpublic MapperScannerConfigurer mapperScannerConfigurer() {MapperScannerConfigurer msc = new MapperScannerConfigurer();msc.setBasePackage("com.practice.dao");return msc;}
}

1.3相关文件：

1.3.1jdbc配置文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/mybatis?useSSL=false
jdbc.userName=root
jdbc.password=123456

1.3.2jdbc配置类及spring配置类

package com.practice.config;import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;import javax.sql.DataSource;/*** @Author YJ* @Date 2023/7/31 10:00* Description:Jdbc配置*/
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 dataSource = new DruidDataSource();dataSource.setDriverClassName(driver);dataSource.setUrl(url);dataSource.setUsername(userName);dataSource.setPassword(password);return dataSource;}
}

package com.practice.config;import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.PropertySource;/*** @Author YJ* @Date 2023/7/31 9:52* Description:*/
@Configuration
@ComponentScan("com.practice")
@PropertySource("jdbc.properties")
@Import({JdbcConfig.class,MybatisConfig.class})
public class SpringConfig {
}

1.3.3数据库操作类

public interface UserDao {void save(User user);@Insert("insert into tb_user(id,username,password,gender,addr) values(#{id},#{username},#{password},#{gender},#{addr})")void insert(User user);@Delete("delete from tb_user where id=#{id}")void delete(Integer id);@Update("update tb_user set username=#{username} where id=#{id}")void update(User user);@Select("select * from tb_user")List<User> selectAll();@Select("select * from tb_user where id=#{id}")User selectById(Integer id);
}

public interface UserService {void save(User user);void update(User user);void delete(Integer id);User selectById(Integer id);List<User> selectAll();
}

@Service
public class UserServiceImpl implements UserService {@Autowiredprivate UserDao userDao;public void save(User user) {userDao.save(user);}public void update(User user) {userDao.update(user);}public void delete(Integer id) {userDao.delete(id);}public User selectById(Integer id) {return userDao.selectById(id);}public List<User> selectAll() {return userDao.selectAll();}
}

1.3.4测试类

public class App2 {public static void main(String[] args) {ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringConfig.class);UserService bean = ctx.getBean(UserService.class);User user = bean.selectById(2);System.out.println(user);}
}

1.3.5运行结果

在这里插入图片描述

二、Spring整合JUnit

2.1使用Spring整合JUnit专用的类加载器

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfig.class)
public class UserServiceTest {@Autowiredprivate UserService userService;@Testpublic void testSelectById() {System.out.println(userService.selectById(2));}@Testpublic void testSelectAll(){System.out.println(userService.selectAll());}
}