4、SpringBoot_Mybatis、Druid、Juint整合

news2025/1/10 16:15:07

五、SSM整合

1.整合Mybatis

1.1springmvc 整合回顾

导入坐标

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.2.17.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.6</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.29</version>
    </dependency>

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.16</version>
    </dependency>

创建数据库配置文件

jdbc.url=jdbc:mysql://localhost:3306/ssm
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.username=root
jdbc.password=123456

提供jdbcconfig

public class DbConfig {

    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.driver}")
    private String driver;
    @Value("${jdbc.username}")
    private String username;
    @Value("${jdbc.password}")
    private String password;

    /**
     * 配置德鲁伊连接池
     * @return
     */
    @Bean
    public DataSource dataSource(){
        DruidDataSource source = new DruidDataSource();
        source.setUrl(url);
        source.setDriverClassName(driver);
        source.setPassword(password);
        source.setUsername(username);
        return source;
    }

    @Bean
    public PlatformTransactionManager transactionManager(DataSource dataSource){
        DataSourceTransactionManager manager = new DataSourceTransactionManager();
        manager.setDataSource(dataSource);
        return manager;
    }

}

springconfig

@Configuration
@ComponentScan(value = {"cn.sycoder.service","cn.sycoder.dao"})
@EnableTransactionManagement
@PropertySource("classpath:db.properties")
@Import({DbConfig.class,MybatisConfig.class})
public class SpringConfig {
}

mybatis 交给spring管理

public class MybatisConfig {

    @Bean
    public SqlSessionFactoryBean sessionFactoryBean(DataSource dataSource){
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setTypeAliasesPackage("cn.sycoder.domain");
        return bean;
    }

    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer(){
        MapperScannerConfigurer configurer = new MapperScannerConfigurer();
        configurer.setBasePackage("cn.sycoder.dao");
        return configurer;
    }
}

1.2SpringBoot整合Mybatis

1.2.1创建模块

创建模块并填入基础信息

添加依赖

在这里插入图片描述

等价于手动添加配置依赖

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.2.2</version>
</dependency>

<dependency>
    <groupId>com.mysql</groupId>
    <artifactId>mysql-connector-j</artifactId>
    <scope>runtime</scope>
</dependency>

1.2.2添加配置

添加mysql配置

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/springboot_ssm
    username: root
    password: 123456

1.2.3创建mapper并且测试

创建 domain

@Data
public class Item {
    private Long id;
    private String name;
    private String remark;
}

创建 mapper

@Mapper
public interface ItemMapper {
    @Insert("insert into item(name,remark) value(#{name},#{remark})")
    void insert(Item item);

    @Select("select * from item where id = #{id}")
    public Item getById(Long id);
}

测试验证

@SpringBootTest
class SpringbootSsmApplicationTests {

    @Autowired
    ItemMapper mapper;

    @Test
    void contextLoads() {
        Item item = new Item();
        item.setName("上云 javase 精讲");
        item.setRemark("课程免费，知识全面");
        mapper.insert(item);

        System.out.println(mapper.getById(1L));
    }

}

1.2.4总结

使用SpringBoot 整合真的太方便了
- 需要添加 mybatis 的依赖也即mybatis-spring-boot-starter
- @Mapper 将Mapper 映射交给容器管理
- 如果有下划线你觉得难受，添加 @Repository就可以解决（不解决也行）

2.整合Druid

2.1目前使用的数据连接池

默认springboot会给我们使用 Hikari 连接池
整合德鲁伊
- 导入对应starter
- 修改配置即可

2.2导入依赖

导入依赖

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.2.15</version>
</dependency>

2.3修改配置

配置如下

spring:
  datasource:
    druid:
      url: jdbc:mysql://localhost:3306/springboot_ssm
      username: root
      password: 123456
      driver-class-name: com.mysql.cj.jdbc.Driver

日志查看
配置总结
- 导入Druid starter
- 提供配置文件

3.整合JUnit

导入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

传统方式

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfig.class)
public class ItemTest {

    @Autowired
    IItemService service;
    @Test
    public void save(){
        Item item = new Item();
        item.setName("单元测试");
        item.setRemark("单元测试");
        item.setType("单元测试");
        boolean save = service.save(item);
        System.out.println(save);
    }
}

3.1@SpringBootTest

现在的使用

@SpringBootTest
class SpringbootSsmApplicationTests {

    @Autowired
    ItemMapper mapper;

    @Test
    void contextLoads() {
        Item item = new Item();
        item.setName("上云 javase 精讲");
        item.setRemark("课程免费，知识全面");
        mapper.insert(item);

        System.out.println(mapper.getById(1L));
    }

}