4、SpringBoot_Mybatis、Druid、Juint整合

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

  

  • 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));
      }
  
  }
  

4.整合其它总结

• 导入对应的 starter
• 需要写配置的提供配置