SpringBoot+Mybatis使用Mapper接口注册的几种方式

CREATE TABLE `money` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(20) NOT NULL DEFAULT '' COMMENT '用户名',
  `money` int(26) NOT NULL DEFAULT '0' COMMENT '钱',
  `is_deleted` tinyint(1) NOT NULL DEFAULT '0',
  `create_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `update_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
  PRIMARY KEY (`id`),
  KEY `name` (`name`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4;

<dependencies>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.2.0</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
</dependencies>

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/story?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=Asia/Shanghai
    username: root
    password:

@Data
public class MoneyPo {
    private Integer id;

    private String name;

    private Long money;

    private Integer isDeleted;

    private Timestamp createAt;

    private Timestamp updateAt;
}

public interface MoneyMapper {

    /**
     * 保存数据，并保存主键id
     *
     * @param po
     * @return int
     */
    @Options(useGeneratedKeys = true, keyProperty = "po.id", keyColumn = "id")
    @Insert("insert into money (name, money, is_deleted) values (#{po.name}, #{po.money}, #{po.isDeleted})")
    int save(@Param("po") MoneyPo po);

    /**
     * 更新
     *
     * @param id    id
     * @param money 钱
     * @return int
     */
    @Update("update money set `money`=#{money} where id = #{id}")
    int update(@Param("id") int id, @Param("money") long money);

    /**
     * 删除数据
     *
     * @param id id
     * @return int
     */
    @Delete("delete from money where id = #{id}")
    int delete(@Param("id") int id);

    /**
     * 主键查询
     *
     * @param id id
     * @return {@link MoneyPo}
     */
    @Select("select * from money where id = #{id}")
    @Results(id = "moneyResultMap", value = {
            @Result(property = "id", column = "id", id = true, jdbcType = JdbcType.INTEGER),
            @Result(property = "name", column = "name", jdbcType = JdbcType.VARCHAR),
            @Result(property = "money", column = "money", jdbcType = JdbcType.INTEGER),
            @Result(property = "isDeleted", column = "is_deleted", jdbcType = JdbcType.TINYINT),
            @Result(property = "createAt", column = "create_at", jdbcType = JdbcType.TIMESTAMP),
            @Result(property = "updateAt", column = "update_at", jdbcType = JdbcType.TIMESTAMP)})
    MoneyPo getById(@Param("id") int id);
}

@Slf4j
@Service
public class MoneyService {
    @Autowired
    private MoneyMapper moneyMapper;

    public void basicTest() {
        int id = save();
        log.info("save {}", getById(id));
        boolean update = update(id, 202L);
        log.info("update {}, {}", update, getById(id));
        boolean delete = delete(id);
        log.info("delete {}, {}", delete, getById(id));
    }

    private int save() {
        MoneyPo po = new MoneyPo();
        po.setName("一灰灰blog");
        po.setMoney(101L);
        po.setIsDeleted(0);
        moneyMapper.save(po);
        return po.getId();
    }

    private boolean update(int id, long newMoney) {
        int ans = moneyMapper.update(id, newMoney);
        return ans > 0;
    }

    private boolean delete(int id) {
        return moneyMapper.delete(id) > 0;
    }

    private MoneyPo getById(int id) {
        return moneyMapper.getById(id);
    }
}

@MapperScan(basePackages = "com.git.hui.boot.mybatis.mapper")
@SpringBootApplication
public class Application {

    public Application(MoneyService moneyService) {
        moneyService.basicTest();
    }

    public static void main(String[] args) {
        SpringApplication.run(Application.class);
    }
}

@Mapper
public interface MoneyMapper {
...
}

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="xxx"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>

@Configuration
public class AutoConfig {
    @Bean(name = "sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(
                // 设置mybatis的xml所在位置，这里使用mybatis注解方式，没有配置xml文件
                new PathMatchingResourcePatternResolver().getResources("classpath*:mapping/*.xml"));
        return bean.getObject();
    }

    @Bean("sqlSessionTemplate")
    public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory storySqlSessionFactory) {
        return new SqlSessionTemplate(storySqlSessionFactory);
    }

    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer() {
        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
        mapperScannerConfigurer.setBasePackage("com.git.hui.boot.mybatis.mapper");
        mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory");
        mapperScannerConfigurer.setSqlSessionTemplateBeanName("sqlSessionTemplate");
        return mapperScannerConfigurer;
    }
}