<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.5.3.1</version>
</dependency>

META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

com.baomidou.mybatisplus.autoconfigure.MybatisPlusAutoConfiguration

@Configuration
@ConditionalOnClass({SqlSessionFactory.class, SqlSessionFactoryBean.class})
@ConditionalOnSingleCandidate(DataSource.class)
@EnableConfigurationProperties(MybatisPlusProperties.class)
@AutoConfigureAfter({DataSourceAutoConfiguration.class})
public class MybatisPlusAutoConfiguration {
    @Bean
    @ConditionalOnMissingBean
    public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {
        MybatisSqlSessionFactoryBean factoryBean = new MybatisSqlSessionFactoryBean();
        factoryBean.setDataSource(dataSource);
        // 設(shè)置 MyBatis-Plus 全局配置、插件、掃描路徑等
        return factoryBean.getObject();
    }
    @Bean
    @ConditionalOnMissingBean
    public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
    @Bean
    @ConditionalOnProperty(prefix = "mybatis-plus", name = "mapper-locations")
    public MapperScannerConfigurer mapperScannerConfigurer() {
        MapperScannerConfigurer configurer = new MapperScannerConfigurer();
        configurer.setBasePackage(mybatisPlusProperties.getMapperLocations());
        return configurer;
    }
}

// 自動(dòng)添加分頁插件
if (globalConfig.getDbConfig().isEnableSqlRunner()) {
    interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
}

public interface BaseMapper<T> extends Mapper<T> {
    int insert(T entity);
    T selectById(Serializable id);
    int updateById(T entity);
    int deleteById(Serializable id);
    // ... 更多方法
}

public interface UserService extends IService<User> {}
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {}

@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor() {
    MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
    interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
    interceptor.addInnerInterceptor(new LogicDeleteInnerInterceptor());
    interceptor.addInnerInterceptor(new BlockAttackInnerInterceptor()); // 防止全表更新/刪除
    return interceptor;
}

flowchart TD
    A[Spring Boot 啟動(dòng)] --> B[加載 MybatisPlusAutoConfiguration]
    B --> C[創(chuàng)建 SqlSessionFactory]
    C --> D[MybatisSqlSessionFactoryBean.build()]
    D --> E[解析 Mapper 接口]
    E --> F[MP 掃描 BaseMapper 子接口]
    F --> G[生成默認(rèn) SQL（通過 SqlMethod 枚舉）]
    G --> H[注冊 MappedStatement]
    H --> I[注入 MybatisPlusInterceptor]
    I --> J[Mapper 代理對(duì)象創(chuàng)建]
    J --> K[Service 層注入 Mapper]
    K --> L[應(yīng)用就緒]

public enum SqlMethod {
    INSERT("insert", "插入一條數(shù)據(jù)", "<script>INSERT INTO %s %s VALUES %s</script>");
    // 更多...
}

// org.apache.ibatis.session.Configuration
mappedStatements.put(ms.getId(), ms); // 注冊到 MyBatis 全局配置

mybatis-plus:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.example.entity
  configuration:
    map-underscore-to-camel-case: true
  global-config:
    db-config:
      id-type: auto
      logic-delete-value: 1
      logic-not-delete-value: 0
  configuration:
    auto-mapping-behavior: full